Roy,
Thanks! Please do think on them. The same yaw-ish offset is seen in
airplanes with crosswinds. We called it crab when I worked with it in a
previous job life.
Grace and peace,
Jim
On 8/2/18 12:38 PM, Lowry, Roy K. wrote:
>
> Dear Jim,
>
>
> For some platforms orientation and course are virtually the same
> thing. However, in??the case of?ships, submarines, gliders and the
> like the medium in which they find themselves moves and course (a data
> stream off our ships called course made good)?is?the compass direction
> towards which the platform is moving?over the seabed. This can be
> significantly different to orientation. Think about a ship doing 3
> knots on a heading of due North with a current of 3 knots running
> towards due East. The course would be 45 degrees.
>
>
> As I said to Nan on first reading it looks like you've done an
> excellent job, especially for the triaxial six (pitch, roll, yaw,
> heave, surge and sway), but I?would like a little thinking time before
> finally?accepting them.
>
>
> Cheers, Roy.
>
>
> I have now retired but will continue to be active through an Emeritus
> Fellowship using this e-mail address.
>
>
>
> ------------------------------------------------------------------------
> *From:* CF-metadata <cf-metadata-bounces at cgd.ucar.edu> on behalf of
> Jim Biard <jbiard at cicsnc.org>
> *Sent:* 02 August 2018 17:18
> *To:* cf-metadata at cgd.ucar.edu
> *Subject:* Re: [CF-metadata] Platform Heave
>
> Nan,
>
> I guess the difference (platform_orientation - platform_course) is
> approximately platform_yaw, although it might include any "at rest"
> crab (yaw). It is a different-enough quantity that I think it probably
> deserves to stay.
>
> Grace and peace,
>
> Jim
>
> On 8/2/18 11:29 AM, Nan Galbraith wrote:
>> Thank you, Jim, well done.
>>
>> My only concern is that platform_orientation is describing the same
>> angle
>> as yaw, and maybe should be deprecated.? The web is full of
>> references to
>> 'platform orientation', and a very quick check tells me they (mainly)
>> refer to
>> all 3 axes.
>>
>> I tried to check the sign of roll for ADCPs, since this is a variable
>> that's output
>> by the Teledyne-RDIs that we use, but I don't have the time to do a
>> thorough job
>> at this point. If different communities define this differently,
>> Maybe we'll need to
>> consider using an attribute.
>>
>> Cheers - Nan
>>
>> On 8/2/18 5:01 AM, Lowry, Roy K. wrote:
>>>
>>> Dear All,
>>>
>>>
>>> You're not going to believe this, but try Googling 'pitch roll yaw'
>>> and look through the images at the?roll sign convention. This
>>> reveals some inconsistency on whether?positive roll is clockwise
>>> when looking forward (Jim's definition)?or looking backward (Ken's
>>> definition).
>>>
>>>
>>> My personal experience from going to sea was that positive roll was
>>> port to?starboard?- i.e. clockwise when looking forward. I'm pretty
>>> sure the roll data?streams we handle (Autosub and gliders)
>>> also?conform to this convention, but will ask somebody to check.
>>>
>>>
>>> Could I suggest that Ken also?check his definition sources and data
>>> streams.
>>>
>>>
>>> Cheers, Roy.
>>>
>>>
>>>
>>> ------------------------------------------------------------------------
>>>
>>> *From:* CF-metadata <cf-metadata-bounces at cgd.ucar.edu>
>>> <mailto:cf-metadata-bounces at cgd.ucar.edu> on behalf of Kenneth Kehoe
>>> <kkehoe at ou.edu> <mailto:kkehoe at ou.edu>
>>> *Sent:* 01 August 2018 22:51
>>> *To:* cf-metadata at cgd.ucar.edu <mailto:cf-metadata at cgd.ucar.edu>
>>> *Subject:* Re: [CF-metadata] Platform Heave
>>> Sounds good to me except the platform_roll positive direction seems
>>> to be opposite of what we have been describing. I typically have
>>> platform roll positive for right-hand side rising.
>>>
>>> Ken
>>>
>>>
>>> On 2018-8-1 13:55, Jim Biard wrote:
>>>>
>>>> Hi.
>>>>
>>>>
>>>> Here is my proposal for a self-consistent and generic set of
>>>> definitions for roll, pitch, yaw, surge, sway, heave, course, and
>>>> orientation. I've tried to avoid lots of reference frame or vector
>>>> terms, basing everything on the vertical direction and the nominal
>>>> forward motion direction, which are two things all the moving
>>>> platforms we are concerned with have, and which I think are easy
>>>> enough to extrapolate to a stationary platform. I haven't bothered
>>>> to do the *_rate definitions, since they are simple extrapolations
>>>> of these definitions.
>>>>
>>>> I have taken the liberty of removing the redundant word "angle"
>>>> from the definitions of roll, pitch, and yaw. It is like using
>>>> "latitude angle" for latitude or "course angle" for course. We can
>>>> make the redundant formulations aliases of the proper ones.
>>>>
>>>>
>>>>
>>>> *
>>>>
>>>> platform_roll: Roll is a rotation about an axis (the X axis) that
>>>> is perpendicular to the local vertical axis (the Z axis) and is
>>>> coplanar with the nominal forward motion direction for the
>>>> platform. The rotation is positive clockwise about that axis when
>>>> seen from behind the platform looking towards it (e.g. right-hand
>>>> side falling), and relative to the ?at rest? rotation of the
>>>> platform with respect to the X axis. Platform is a structure or
>>>> vehicle that serves as a base for mounting sensors. Platforms
>>>> include, but are not limited to, satellites, aeroplanes, ships,
>>>> buoys, ground stations, and masts.
>>>>
>>>> **
>>>>
>>>> *
>>>> *
>>>>
>>>> platform_pitch: Pitch is a rotation about an axis (the Y axis) that
>>>> is perpendicular to both the local vertical axis (the Z axis) and
>>>> the nominal forward motion direction for the platform. The rotation
>>>> is positive clockwise about that axis when seen from the left of
>>>> the platform looking towards it (e.g. front end rising), and
>>>> relative to the ?at rest? rotation of the platform with respect to
>>>> the Y axis. Platform is a structure or vehicle that serves as a
>>>> base for mounting sensors. Platforms include, but are not limited
>>>> to, satellites, aeroplanes, ships, buoys, ground stations, and masts.
>>>>
>>>> **
>>>>
>>>> *
>>>> *
>>>>
>>>> platform_yaw: Yaw is a rotation about the local vertical axis (the
>>>> Z axis). The rotation is positive clockwise about that axis when
>>>> seen from above the platform looking towards it (e.g. front end
>>>> turning to the right), and relative to the ?at rest? rotation of
>>>> the platform with respect to the Z axis. Platform is a structure or
>>>> vehicle that serves as a base for mounting sensors. Platforms
>>>> include, but are not limited to, satellites, aeroplanes, ships,
>>>> buoys, ground stations, and masts.
>>>>
>>>> **
>>>>
>>>> *
>>>> *
>>>>
>>>> platform_surge: Surge is a displacement along an axis (the X axis)
>>>> that is perpendicular to the local vertical axis (the Z axis) and
>>>> is coplanar with the nominal forward motion direction for the
>>>> platform. The displacement is positive for motion of the platform
>>>> in the nominal forward motion direction (e.g. forward motion), and
>>>> relative to the ?at rest? position of the platform with respect to
>>>> the X axis. The ?at rest? position of the platform may change over
>>>> time. Platform is a structure or vehicle that serves as a base for
>>>> mounting sensors. Platforms include, but are not limited to,
>>>> satellites, aeroplanes, ships, buoys, ground stations, and masts.
>>>>
>>>> **
>>>>
>>>> *
>>>> *
>>>>
>>>> platform_sway: Sway is a displacement along an axis (the Y axis)
>>>> that is perpendicular to both the local vertical axis (the Z axis)
>>>> and the nominal forward motion direction for the platform. The
>>>> displacement is positive for motion of the platform to the right of
>>>> the nominal forward motion direction when seen from behind the
>>>> platform looking towards it (e.g. rightward motion), and relative
>>>> to the ?at rest? position of the platform with respect to the Y
>>>> axis. The ?at rest? position of the platform may change over time.
>>>> Platform is a structure or vehicle that serves as a base for
>>>> mounting sensors. Platforms include, but are not limited to,
>>>> satellites, aeroplanes, ships, buoys, ground stations, and masts.
>>>>
>>>> **
>>>>
>>>> *
>>>> *
>>>>
>>>> platform_heave: Heave is a displacement along the local vertical
>>>> axis (the Z axis). The displacement is positive for upward motion
>>>> of the platform, and relative to the ?at rest? position of the
>>>> platform with respect to the Z axis. The ?at rest? position of the
>>>> platform may change over time. Platform is a structure or vehicle
>>>> that serves as a base for mounting sensors. Platforms include, but
>>>> are not limited to, satellites, aeroplanes, ships, buoys, ground
>>>> stations, and masts.
>>>>
>>>> **
>>>>
>>>> *
>>>> *
>>>>
>>>> platform_course: Course is the clockwise angle with respect to
>>>> North of the nominal forward motion direction of the platform.
>>>> Platform is a structure or vehicle that serves as a base for
>>>> mounting sensors. Platforms include, but are not limited to,
>>>> satellites, aeroplanes, ships, buoys, ground stations, and masts.
>>>>
>>>> **
>>>>
>>>> *
>>>> *
>>>>
>>>> platform_orientation: Orientation is the clockwise angle with
>>>> respect to North of the longitudinal (front-to-back) axis of the
>>>> platform, which may be different than the platform course (see
>>>> platform_course).*Platforms include, but are not limited to,
>>>> satellites, aeroplanes, ships, buoys, ground stations, and masts.*
>>>>
>>>> *
>>>> Grace and peace,
>>>>
>>>> Jim
>>>>
>>>> On 7/31/18 3:29 AM, Lowry, Roy K. wrote:
>>>>>
>>>>> On second thoughts removing the underscores is more elegant
>>>>> correction than adding 'platform'.
>>>>>
>>>>>
>>>>> Cheers, Roy.
>>>>>
>>>>>
>>>>> I have now retired but will continue to be active through an
>>>>> Emeritus Fellowship using this e-mail address.
>>>>>
>>>>>
>>>>>
>>>>> ------------------------------------------------------------------------
>>>>>
>>>>> *From:* CF-metadata <cf-metadata-bounces at cgd.ucar.edu>
>>>>> <mailto:cf-metadata-bounces at cgd.ucar.edu>
>>>>> <mailto:cf-metadata-bounces at cgd.ucar.edu>
>>>>> <mailto:cf-metadata-bounces at cgd.ucar.edu> on behalf of Lowry, Roy
>>>>> K. <rkl at bodc.ac.uk> <mailto:rkl at bodc.ac.uk>
>>>>> <mailto:rkl at bodc.ac.uk> <mailto:rkl at bodc.ac.uk>
>>>>> *Sent:* 30 July 2018 18:49
>>>>> *To:* Kenneth Kehoe
>>>>> *Cc:* CF Metadata List
>>>>> *Subject:* Re: [CF-metadata] Platform Heave
>>>>>
>>>>> Hi Ken,
>>>>>
>>>>>
>>>>> You're absolutely right - should have been platform_yaw_angle.
>>>>> Getting the detail spot on in these things isn't easy, which is
>>>>> why we have discussion lists!
>>>>>
>>>>>
>>>>> With the way I'm currently seeing things?I don't agree that pitch
>>>>> and roll affect the definition of heave. They are only factors
>>>>> that come into account with the coupling of heave into the next
>>>>> level of the CRS hierarchy.
>>>>>
>>>>>
>>>>> Cheers, Roy.
>>>>>
>>>>>
>>>>> I have now retired but will continue to be active through an
>>>>> Emeritus Fellowship using this e-mail address.
>>>>>
>>>>>
>>>>>
>>>>> ------------------------------------------------------------------------
>>>>>
>>>>> *From:* CF-metadata <cf-metadata-bounces at cgd.ucar.edu>
>>>>> <mailto:cf-metadata-bounces at cgd.ucar.edu>
>>>>> <mailto:cf-metadata-bounces at cgd.ucar.edu>
>>>>> <mailto:cf-metadata-bounces at cgd.ucar.edu> on behalf of Kenneth
>>>>> Kehoe <kkehoe at ou.edu> <mailto:kkehoe at ou.edu>
>>>>> <mailto:kkehoe at ou.edu> <mailto:kkehoe at ou.edu>
>>>>> *Sent:* 30 July 2018 18:39
>>>>> *Cc:* CF Metadata List
>>>>> *Subject:* Re: [CF-metadata] Platform Heave
>>>>> I agree with John the (keel to top of mast) statement is incorrect
>>>>> when the platform is tilted. I only inserted that to help describe
>>>>> the Z-axis. But I don't think it's helping. I think John is also
>>>>> right on point with this since I can't find a definition of heave
>>>>> that discusses the orientation of the platform and how it relates
>>>>> to the measurement of heave. That is why I'm suggesting we not try
>>>>> to tackle that issue. From an instrument perspective I don't think
>>>>> the organization writing the measurement to file actually know all
>>>>> the details of how the values are derived or the full reference
>>>>> frame. I tell people to not use the standard_name definitions
>>>>> unless they are positive it matches exactly, and without all the
>>>>> information I don't think people will be able to use a too
>>>>> specific definition. A less specific definition would allow the
>>>>> use now, and a more specific definition can be added later if needed.
>>>>>
>>>>> I did like Roy's definition of platform_yaw_angle and
>>>>> platform_yaw_rate. My only suggestion is to remove the underscore
>>>>> in "yaw_angle" in the definition of platform_yaw_rate, or use the
>>>>> full term "platform_yaw_angle". Otherwise it appears like a
>>>>> reference to a different term.
>>>>>
>>>>> Ken
>>>>>
>>>>>
>>>>>
>>>>> On 2018-7-30 10:52, John Graybeal wrote:
>>>>>> 1) Now that we have another platform_heave comment, could we
>>>>>> please create a new thread for the discussion on
>>>>>> pitch/roll/heading? ?Maybe starting without all the historical
>>>>>> points, at least the heave-related ones? Both are difficult
>>>>>> conversations to follow in sequence.
>>>>>>
>>>>>> 2) I have a concern about the last two heave definitions.
>>>>>> ? a) "Heave is the linear motion along the vertical Z-axis (e.g.
>>>>>> keel to top of mast) with positive values representing upward
>>>>>> motion.?
>>>>>>
>>>>>> I like the thrust of this definition, it?s simple to understand.
>>>>>> However I don?t think it?s measured in the direction of keel to
>>>>>> top of mast of the current or recent vessel position, is it? I
>>>>>> rather assume it is perpendicular to a nominally level service,
>>>>>> possibly in the direction of the gravity vector. The dictionary
>>>>>> definition "Heaving is the linear motion along the vertical
>>>>>> Z-axis? with the positive values coda seems closer.
>>>>>>
>>>>>> ? b) "upwards vertical displacement of a platform over a
>>>>>> measurement time interval?
>>>>>>
>>>>>> I can?t tell how to parse ?over? here. ?An upwards vertical
>>>>>> displacement is relative to another position, and in this case I
>>>>>> think that ?original? position is being measured (at least
>>>>>> conceptually) during another time interval. It just needs a few
>>>>>> words, something like ?of a platform when compared to its average
>>>>>> vertical position over a corresponding time interface?.
>>>>>>
>>>>>> But I guess the fundamental issue is I can?t tell (and don?t
>>>>>> actually know) what heave is determined with respect to. If my
>>>>>> last 11 positions relative to average seas are 0, 1, 2, 2, 1, 4,
>>>>>> 1, 2, 2, 1, 0 (think hilly!), I have no idea if the heave at the
>>>>>> peak (?4?) is 4 or something else ? it just depends on when and
>>>>>> how long the baseline measurement is, doesn?t it? ?(Or to put it
>>>>>> another way, is the heave at the 7th point a negative number,
>>>>>> since the ship just went down 3 units?) ?If someone can answer
>>>>>> that then our best definition might be more obvious.
>>>>>>
>>>>>> John
>>>>>>
>>>>>> ---------------------------------------
>>>>>> John Graybeal
>>>>>> jbgraybeal at mindspring.com <mailto:jbgraybeal at mindspring.com>
>>>>>> <mailto:jbgraybeal at mindspring.com>
>>>>>> <mailto:jbgraybeal at mindspring.com>
>>>>>>
>>>>>>> On Jul 29, 2018, at 04:29, Lowry, Roy K. <rkl at bodc.ac.uk
>>>>>>> <mailto:rkl at bodc.ac.uk> <mailto:rkl at bodc.ac.uk>
>>>>>>> <mailto:rkl at bodc.ac.uk>> wrote:
>>>>>>>
>>>>>>> Dear All,
>>>>>>>
>>>>>>> Giving it some thought over the weekend I realise that where we
>>>>>>> lost the plot in this discussion was when we encountered
>>>>>>> 'direction of travel'. Jim succinctly described platform motion
>>>>>>> with the phrase 'nested co-ordinate systems'. What I failed to
>>>>>>> realise - and I'm guessing I'm not alone - is that the pitch,
>>>>>>> roll, heave etc. family of terms for platform motion refer
>>>>>>> SOLELY to the innermost co-ordinate reference in that nest and
>>>>>>> that the 'zero' for these measurements is 'platform at rest'.
>>>>>>> This innermost co-ordinate reference comprises three orthogonal
>>>>>>> axes that intersect at the platform's centre of gravity. Two of
>>>>>>> these are horizontal (Ken's longitudinal X-axis and transverse
>>>>>>> Y-axis) and the third vertical (Ken's vertical Z-axis). Others
>>>>>>> make?no attempt to treat these parameters in the same way as
>>>>>>> zenith, and I now realise?CF shouldn't be any different.
>>>>>>>
>>>>>>> Having come to terms with this, Ken's definition elements hve a
>>>>>>> beautiful simplicity that?can be slotted into Alison's compound
>>>>>>> definitions. My only problem is the inclusion of nautical terms
>>>>>>> like 'bow' and 'stern', but these can easily be replaced by
>>>>>>> generic equivalents such as 'front' and 'back'. I would also
>>>>>>> make it clearer is that zero is platform at rest.
>>>>>>>
>>>>>>> For example the definition pair for yaw become:
>>>>>>>
>>>>>>> platform_yaw_angle
>>>>>>> "yaw _angle"?is the amount of rotation from the rest
>>>>>>> position?around the vertical Z-axis with positive values
>>>>>>> resulting in clockwise motion?when viewed from above.?The
>>>>>>> vertical?Z axis, also known as the "yaw axis", is an imaginary
>>>>>>> line running vertically through the platform's?centre of
>>>>>>> gravity. Standard names for "platform" describe the motion and
>>>>>>> orientation of the vehicle from which observations are made.
>>>>>>> Platforms include, but are not limited to, satellites,
>>>>>>> aeroplanes, ships, instruments and buoys.
>>>>>>>
>>>>>>> platform_yaw_rate
>>>>>>> "platform_yaw_rate" is the change per unit time of "yaw_angle".
>>>>>>> "yaw _angle"?is?the amount of rotation from the rest
>>>>>>> position?around the vertical Z-axis with positive values
>>>>>>> resulting in clockwise motion?when viewed from above.?The
>>>>>>> vertical Z axis, also known as the "yaw axis", is an imaginary
>>>>>>> line running vertically through the platform's centre of
>>>>>>> gravity. Standard names for "platform" describe the motion and
>>>>>>> orientation of the vehicle from which observations are made.
>>>>>>> Platforms include, but are not limited to, satellites,
>>>>>>> aeroplanes, ships, instruments and buoys.
>>>>>>>
>>>>>>> How does that work for people?
>>>>>>>
>>>>>>> Cheers, Roy.
>>>>>>>
>>>>>>> I have now retired but will continue to be active through an
>>>>>>> Emeritus Fellowship using this e-mail address.
>>>>>>>
>>>>>>>
>>>>>>> ------------------------------------------------------------------------
>>>>>>>
>>>>>>> *From:*CF-metadata <cf-metadata-bounces at cgd.ucar.edu
>>>>>>> <mailto:cf-metadata-bounces at cgd.ucar.edu>
>>>>>>> <mailto:cf-metadata-bounces at cgd.ucar.edu>
>>>>>>> <mailto:cf-metadata-bounces at cgd.ucar.edu>> on behalf of Kenneth
>>>>>>> Kehoe <kkehoe at ou.edu <mailto:kkehoe at ou.edu>
>>>>>>> <mailto:kkehoe at ou.edu> <mailto:kkehoe at ou.edu>>
>>>>>>> *Sent:*27 July 2018 16:49
>>>>>>> *To:*cf-metadata at cgd.ucar.edu <mailto:cf-metadata at cgd.ucar.edu>
>>>>>>> <mailto:cf-metadata at cgd.ucar.edu>
>>>>>>> *Subject:*Re: [CF-metadata] Platform Heave
>>>>>>> All,
>>>>>>>
>>>>>>> Sorry for joining this conversation late. This is an important
>>>>>>> discussion for my group and finding a resolution would be very
>>>>>>> helpful. For my purposes I only need a good definition, which
>>>>>>> might coincide with the nautical definitions. For examplethis
>>>>>>> reference
>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.wartsila.com_encyclopedia_term_ship-2Dmotions&d=DwMFaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=J2x5E3dUpn954rPN8-v-TFQOZiyobvfd2MaoRgJ8_Zg&s=GnqNqW163_p5PcNhTjRgd0qwnu6cR6JuDeQvE2qaBGQ&e=>
>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.wartsila.com_encyclopedia_term_ship-2Dmotions&d=DwMFaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=J2x5E3dUpn954rPN8-v-TFQOZiyobvfd2MaoRgJ8_Zg&s=GnqNqW163_p5PcNhTjRgd0qwnu6cR6JuDeQvE2qaBGQ&e=>would
>>>>>>> suffice for most of my needs except for the missing definition
>>>>>>> of positive direction. I've asked about defining a positive
>>>>>>> direction in the past using the "positive" attribute and it was
>>>>>>> decided to not expand that attribute. If we can define the
>>>>>>> positive direction in all the platform standard names that would
>>>>>>> be great, but it should be universally existent for all current
>>>>>>> and future platform definitions.
>>>>>>>
>>>>>>> I would prefer to not get into the details of how a value is
>>>>>>> derived in the definition as that is more of the cell_methods
>>>>>>> domain. Also I find that confusing as heave on an ocean going
>>>>>>> ship is not always measured as the difference between two GPS
>>>>>>> points but could be an integration of a speed or acceleration.
>>>>>>> This would result in two different measurements that depend on
>>>>>>> the method, but both are correct.
>>>>>>>
>>>>>>> I next attempted to come up with some definitions but I ended up
>>>>>>> going down a wormhole of different reference frames only to
>>>>>>> realize in the end my definitions will never match with the
>>>>>>> values from the vendor supplied data values because my
>>>>>>> definitions were becoming too specific. I can't find a
>>>>>>> definition of heave that takes into account tides, large waves
>>>>>>> (water or atmospheric), or orientation of the platform. They all
>>>>>>> seem to be relative to the platform position some x time ago. So
>>>>>>> here is my attempt at the definitions:
>>>>>>>
>>>>>>> platform_heave =? Heave is the linear motion along the vertical
>>>>>>> Z-axis (e.g. keel to top of mast) with positive values
>>>>>>> representing upward motion.
>>>>>>>
>>>>>>> platform_sway = Sway is the motion along the transverse Y-axis
>>>>>>> (e.g. port to starboard) with positive values towards the
>>>>>>> right-hand side the platform (starboard) when oriented towards
>>>>>>> leading edge of the platform.
>>>>>>>
>>>>>>> platform_surge = Surge is the motion along the longitudinal
>>>>>>> X-axis (e.g. stern to bow) with positive values indicating
>>>>>>> motion towards the leading edge of the platform (bow).
>>>>>>>
>>>>>>> platform_roll_angle = Roll is a rotation around a longitudinal
>>>>>>> X-axis with positive values resulting in counter clockwise
>>>>>>> motion (e.g. right-hand side rising) when oriented towards
>>>>>>> leading edge of the platform.
>>>>>>>
>>>>>>> platform_pitch_angle = Pitch is a rotation around the transverse
>>>>>>> Y-axis with positive values resulting in counter clockwise
>>>>>>> motion (e.g. leading edge of the platform rising).
>>>>>>>
>>>>>>> platform_yaw_angle = Yaw is a rotation around the vertical
>>>>>>> Z-axis with positive values resulting in clockwise motion of the
>>>>>>> forward section (bow) when viewed from above.
>>>>>>>
>>>>>>> platform_roll_rate = Roll rate is rotation change per unit time
>>>>>>> around a longitudinal X-axis with positive values resulting in
>>>>>>> counter clockwise motion (e.g. right-hand side rising) when
>>>>>>> oriented towards leading edge of the platform.
>>>>>>>
>>>>>>> platform_pitch_rate = Pitch rate is rotation change per unit
>>>>>>> time around the transverse Y-axis with positive values resulting
>>>>>>> in counter clockwise motion (e.g. leading edge of the platform
>>>>>>> rising).
>>>>>>>
>>>>>>> platform_yaw_rate = Yaw rate is rotation change per unit time
>>>>>>> around the vertical Z-axis with positive values resulting in
>>>>>>> clockwise motion of the forward section (bow) when viewed from
>>>>>>> above.
>>>>>>>
>>>>>>> I know these differ from the current definitions, but I'm not
>>>>>>> completely understanding how the definitions are created. Is
>>>>>>> platform_orientation always prepended? Is a rate always defined
>>>>>>> with the same as the angle definition but with a final sentence
>>>>>>> explaining it's actually a rate?
>>>>>>>
>>>>>>> Thanks,
>>>>>>>
>>>>>>> Ken
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On 2018-7-25 09:50, Jim Biard wrote:
>>>>>>>> Alison,
>>>>>>>> It's a lovely nested reference frames problem, isn't it? Roll,
>>>>>>>> pitch, and yaw are usually defined relative to a center of
>>>>>>>> motion (CM) reference frame defined using the (mean) direction
>>>>>>>> of motion and the up direction. In my (satellite-based)
>>>>>>>> experience, the Y axis unit vector is defined by the normalized
>>>>>>>> cross-product of the up unit vector with the direction of
>>>>>>>> motion unit vector (Z x X). The X axis unit vector is then
>>>>>>>> defined by the cross-product of the Y unit vector and the up
>>>>>>>> unit vector (Y x Z). This means of forming the CM reference
>>>>>>>> frame decouples orientation from motion. The X axis is not
>>>>>>>> necessarily identical to the direction of motion. The vehicle
>>>>>>>> reference frame may have fixed offsets in x, y, z, roll, pitch,
>>>>>>>> and yaw relative to the CM reference frame, but in my limited
>>>>>>>> experience those offsets have been zero.
>>>>>>>> Platforms that aren't moving are an even more entertaining
>>>>>>>> case, for sure!
>>>>>>>> In the end, I'd tend towards referring to a CM or geospatial
>>>>>>>> reference frame with the Z direction defined as "up" if I'm
>>>>>>>> going to try and get detailed about it, as opposed to 'mean
>>>>>>>> orientation'. But I only have experience with satellites (and a
>>>>>>>> bit with airplanes).
>>>>>>>> Grace and peace,
>>>>>>>> Jim
>>>>>>>>
>>>>>>>> On 7/25/18 9:37 AM, Alison Pamment - UKRI STFC wrote:
>>>>>>>>> Hi Roy and Jim,
>>>>>>>>>
>>>>>>>>> Thanks for your quick comments on the definitions. I have just
>>>>>>>>> been looking again at the suggested text for yaw_angle:
>>>>>>>>> 'Platform yaw angle is the angle between the platform's
>>>>>>>>> longitudinal/X axis and the direction of travel. Zero yaw
>>>>>>>>> angle means the longitudinal axis is aligned with the
>>>>>>>>> direction of travel, or a reference direction if the platform
>>>>>>>>> is stationary. The usual sign convention is that yaw angle is
>>>>>>>>> measured positive when the front or leading edge of the
>>>>>>>>> platform is rotated clockwise from its orientation (which has
>>>>>>>>> the standard name platform_orientation).'
>>>>>>>>>
>>>>>>>>> The problem is how to describe the reference direction which
>>>>>>>>> the angle is calculated relative to. I started out by talking
>>>>>>>>> about 'direction of travel' and later referred to
>>>>>>>>> 'platform_orientation'. The definition of platform_orientation
>>>>>>>>> says 'The platform orientation is the direction in which the
>>>>>>>>> "front" or longitudinal axis of the platform is pointing (not
>>>>>>>>> necessarily the same as the direction in which it is
>>>>>>>>> travelling, called platform_course).' I've realised my new
>>>>>>>>> definition doesn't really make sense if direction of travel
>>>>>>>>> and orientation aren't the same (and clearly they can be
>>>>>>>>> different). Also, if 'orientation' is the instantaneous
>>>>>>>>> direction of the longitudinal axis, then presumably it
>>>>>>>>> includes yaw angle, so it isn't the right reference for
>>>>>>>>> measuring yaw.
>>>>>>>>>
>>>>>>>>> I've revised the text as follows:
>>>>>>>>> 'Platform yaw angle is the angle between the platform's
>>>>>>>>> longitudinal/X axis and the platform's mean orientation (i.e.
>>>>>>>>> its orientation not including high frequency variations due to
>>>>>>>>> swaying and rocking motions, for example, ship motions caused
>>>>>>>>> by the passing of sea surface waves). Zero yaw angle means the
>>>>>>>>> longitudinal axis is aligned with the mean orientation. The
>>>>>>>>> usual sign convention is that yaw angle is measured positive
>>>>>>>>> when the front or leading edge of the platform is rotated
>>>>>>>>> clockwise from its mean orientation (which has the standard
>>>>>>>>> name platform_orientation).
>>>>>>>>>
>>>>>>>>> Does it sound okay to refer to a 'mean orientation' in this
>>>>>>>>> way? I'm having trouble thinking of a better wording!
>>>>>>>>>
>>>>>>>>> Best wishes,
>>>>>>>>> Alison
>>>>>>>>>
>>>>>>>>> ------
>>>>>>>>> Alison Pamment???????????????????????????????? Tel: +44 1235
>>>>>>>>> 778065
>>>>>>>>> NCAS/Centre for Environmental Data Archival
>>>>>>>>> Email:alison.pamment at stfc.ac.uk
>>>>>>>>> <mailto:Email:alison.pamment at stfc.ac.uk>
>>>>>>>>> <mailto:alison.pamment at stfc.ac.uk>
>>>>>>>>> <mailto:alison.pamment at stfc.ac.uk>
>>>>>>>>> STFC Rutherford Appleton Laboratory
>>>>>>>>> R25, 2.22
>>>>>>>>> Harwell Oxford, Didcot, OX11 0QX, U.K.
>>>>>>>>>
>>>>>>>>> -----Original Message-----
>>>>>>>>> From: CF-metadata<cf-metadata-bounces at cgd.ucar.edu>
>>>>>>>>> <mailto:cf-metadata-bounces at cgd.ucar.edu>
>>>>>>>>> <mailto:cf-metadata-bounces at cgd.ucar.edu>
>>>>>>>>> <mailto:cf-metadata-bounces at cgd.ucar.edu>? On Behalf Of Alison
>>>>>>>>> Pamment - UKRI STFC
>>>>>>>>> Sent: 25 July 2018 13:12
>>>>>>>>> To: Hamilton, Steve<sj.hamilton at fugro.com>
>>>>>>>>> <mailto:sj.hamilton at fugro.com> <mailto:sj.hamilton at fugro.com>
>>>>>>>>> <mailto:sj.hamilton at fugro.com>;cf-metadata at cgd.ucar.edu
>>>>>>>>> <mailto:cf-metadata at cgd.ucar.edu>
>>>>>>>>> <mailto:cf-metadata at cgd.ucar.edu>
>>>>>>>>> Subject: Re: [CF-metadata] Platform Heave
>>>>>>>>>
>>>>>>>>> Dear Steve, Nan, et al,
>>>>>>>>>
>>>>>>>>> Thank you for proposing new standard names for platform_heave
>>>>>>>>> and improved definitions for existing names for platform
>>>>>>>>> pitch, roll and yaw. Thank you also to all those who submitted
>>>>>>>>> comments about these names.
>>>>>>>>>
>>>>>>>>> Regarding Steve's proposals for new names, the discussion
>>>>>>>>> seems to have reached consensus on the quantities themselves.
>>>>>>>>>
>>>>>>>>> Until now, our usual explanatory sentence for 'platform' has
>>>>>>>>> said 'Standard names for platform describe the motion and
>>>>>>>>> orientation of the vehicle from which observations are made
>>>>>>>>> e.g. aeroplane, ship or satellite.' Nan has suggested
>>>>>>>>> extending the list of possible platforms, which seems fair
>>>>>>>>> enough, so we would now have 'Standard names for platform
>>>>>>>>> describe the motion and orientation of the vehicle from which
>>>>>>>>> observations are made. Platforms include, but are not limited
>>>>>>>>> to, satellites, aeroplanes, ships, instruments, and buoys.'
>>>>>>>>> I've added this into the definitions of Steve's names, leading
>>>>>>>>> to:
>>>>>>>>>
>>>>>>>>> platform_heave (m)
>>>>>>>>> 'Standard names for "platform" describe the motion and
>>>>>>>>> orientation of the vehicle from which observations are made.
>>>>>>>>> Platforms include, but are not limited to, satellites,
>>>>>>>>> aeroplanes, ships, instruments, and buoys. "Heave" means the
>>>>>>>>> vertical displacement of a platform (positive upwards) over a
>>>>>>>>> measurement time interval.'
>>>>>>>>>
>>>>>>>>> platform_heave_rate (m s-1)
>>>>>>>>> 'Standard names for "platform" describe the motion and
>>>>>>>>> orientation of the vehicle from which observations are made.
>>>>>>>>> Platforms include, but are not limited to, satellites,
>>>>>>>>> aeroplanes, ships, instruments, and buoys "Heave" means the
>>>>>>>>> vertical displacement of a platform (positive upwards) over a
>>>>>>>>> measurement time interval. "Heave rate" means the rate of
>>>>>>>>> change of vertical displacement of the platform over a
>>>>>>>>> measurement time interval.'
>>>>>>>>>
>>>>>>>>> These two names are accepted for publication in the standard
>>>>>>>>> name table and will be added in the next update, planned for
>>>>>>>>> 6th August.
>>>>>>>>>
>>>>>>>>> We have six existing platform pitch, roll and yaw names:
>>>>>>>>> platform_pitch_angle (degree)
>>>>>>>>> platform_pitch_rate (degree s-1)
>>>>>>>>> platform_roll_angle (degree)
>>>>>>>>> platform_roll_rate (degree s-1)
>>>>>>>>> platform_yaw_angle (degree)
>>>>>>>>> platform_yaw_rate (degree s-1)
>>>>>>>>>
>>>>>>>>> Nan has suggested the following definitions, based
>>>>>>>>> onhttps://en.wikipedia.org/wiki/Ship_motions
>>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__en.wikipedia.org_wiki_Ship-5Fmotions&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=gxXkUfvVSqtWNEzxwyAeuKgEMzADzXWv2OOZtOBRAao&e=>
>>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__en.wikipedia.org_wiki_Ship-5Fmotions&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=gxXkUfvVSqtWNEzxwyAeuKgEMzADzXWv2OOZtOBRAao&e=>.
>>>>>>>>> (A quick search of other online sources yields definitions
>>>>>>>>> consistent with these).
>>>>>>>>> Pitch
>>>>>>>>> The up/down rotation of a platform about its transverse/Y
>>>>>>>>> axis. The transverse/Y axis, lateral or pitch axis is an
>>>>>>>>> imaginary line running horizontally across the platform and
>>>>>>>>> through its center of gravity. A pitch motion is an up-or-down
>>>>>>>>> movement of the bow and stern of the platform.
>>>>>>>>>
>>>>>>>>> Roll
>>>>>>>>> The tilting rotation of a platform about its longitudinal/X
>>>>>>>>> axis. The longitudinal/X axis, or roll axis, is an imaginary
>>>>>>>>> line running horizontally through the length of the platform,
>>>>>>>>> through its center of gravity, and parallel to the waterline.
>>>>>>>>> A roll motion is a side-to-side or port-starboard tilting
>>>>>>>>> motion of the superstructure around this axis.
>>>>>>>>>
>>>>>>>>> Yaw
>>>>>>>>> The turning rotation of a platform about its vertical/Z axis.
>>>>>>>>> The vertical/Z axis, or yaw axis, is an imaginary line running
>>>>>>>>> vertically through the platform and through its center of
>>>>>>>>> gravity. A yaw motion is a side-to side movement of the bow
>>>>>>>>> and stern of the ship.
>>>>>>>>>
>>>>>>>>> These are useful and concise definitions. I suggest that we
>>>>>>>>> don't refer anywhere to 'ship', 'bow' or 'stern', since we
>>>>>>>>> want the definitions to apply to all possible platforms. I'm
>>>>>>>>> thinking also that 'port' and 'starboard' may apply to ships
>>>>>>>>> and aeroplanes, but perhaps not to a satellite, so are
>>>>>>>>> probably best avoided. Similarly, 'waterline' only applies to
>>>>>>>>> maritime platforms. I suggest the following amendments to make
>>>>>>>>> the definitions as generic as possible:
>>>>>>>>>
>>>>>>>>> Pitch
>>>>>>>>> "Pitch" means rotation of the platform in the vertical plane
>>>>>>>>> about its transverse/Y axis. The transverse/Y axis, also known
>>>>>>>>> as the "lateral axis" or "pitch axis", is an imaginary line
>>>>>>>>> running horizontally across the platform and through its
>>>>>>>>> center of gravity. In pitch motion, the leading edge of the
>>>>>>>>> platform moves vertically upwards while the rear moves
>>>>>>>>> vertically downwards, and vice versa.
>>>>>>>>>
>>>>>>>>> Roll
>>>>>>>>> "Roll" means rotation of the platform in the vertical plane
>>>>>>>>> about its longitudinal/X axis. The longitudinal/X axis, also
>>>>>>>>> known as the "roll axis", is an imaginary line running
>>>>>>>>> horizontally through the length of the platform and through
>>>>>>>>> its center of gravity. In roll motion, the platform tilts such
>>>>>>>>> that one side moves vertically upwards while the other moves
>>>>>>>>> vertically downwards, and vice versa.
>>>>>>>>>
>>>>>>>>> Yaw
>>>>>>>>> "Yaw" means rotation of the platform in the horizontal plane
>>>>>>>>> about its vertical/Z axis. The vertical/Z axis, also known as
>>>>>>>>> the "yaw axis", is an imaginary line running vertically
>>>>>>>>> through the platform and through its center of gravity. In yaw
>>>>>>>>> motion, the platform rotates clockwise or counter clockwise in
>>>>>>>>> the horizontal, relative to its orientation, which has the
>>>>>>>>> standard name platform_orientation.
>>>>>>>>>
>>>>>>>>> Are these okay?
>>>>>>>>>
>>>>>>>>> For names such as platform_view_angle and
>>>>>>>>> platform_zenith_angle we also describe how the angle itself is
>>>>>>>>> measured. We should do the same for pitch, roll and yaw angles
>>>>>>>>> while we are in the process of updating the definitions. I
>>>>>>>>> have come up with the following:
>>>>>>>>>
>>>>>>>>> Pitch angle
>>>>>>>>> Platform pitch angle is the angle between the local horizontal
>>>>>>>>> and the platform's longitudinal/X axis. Zero pitch angle means
>>>>>>>>> the longitudinal axis is horizontal. The usual sign convention
>>>>>>>>> is that pitch angle is measured positive when the front or
>>>>>>>>> leading edge of the platform is elevated above the horizontal,
>>>>>>>>> negative when it is below the horizontal.
>>>>>>>>>
>>>>>>>>> Roll angle
>>>>>>>>> Platform roll angle is the angle between the local horizontal
>>>>>>>>> and the platform's lateral/Y axis. Zero roll angle means the
>>>>>>>>> lateral axis is horizontal. The usual sign convention is that
>>>>>>>>> roll angle is measured positive when the right hand edge of
>>>>>>>>> the platform (when viewing towards the orientation direction
>>>>>>>>> or "front" of the platform) is elevated above the horizontal,
>>>>>>>>> negative when it is below the horizontal.
>>>>>>>>>
>>>>>>>>> Yaw angle
>>>>>>>>> Platform yaw angle is the angle between the platform's
>>>>>>>>> longitudinal/X axis and the direction of travel. Zero yaw
>>>>>>>>> angle means the longitudinal axis is aligned with the
>>>>>>>>> direction of travel, or a reference direction if the platform
>>>>>>>>> is stationary. The usual sign convention is that yaw angle is
>>>>>>>>> measured positive when the front or leading edge of the
>>>>>>>>> platform is rotated clockwise from its orientation (which has
>>>>>>>>> the standard name platform_orientation).
>>>>>>>>>
>>>>>>>>> Just so we can see a couple of examples of pulling all this
>>>>>>>>> together, I've written out the full revised definitions of
>>>>>>>>> platform platform_pitch_angle and platform_pitch_rate below.
>>>>>>>>>
>>>>>>>>> platform_pitch_angle (degree)
>>>>>>>>> 'Standard names for "platform" describe the motion and
>>>>>>>>> orientation of the vehicle from which observations are made.
>>>>>>>>> Platforms include, but are not limited to, satellites,
>>>>>>>>> aeroplanes, ships, instruments and buoys. "Pitch" means
>>>>>>>>> rotation of the platform in the vertical plane about its
>>>>>>>>> transverse/Y axis. The transverse/Y axis, also known as the
>>>>>>>>> "lateral axis" or "pitch axis", is an imaginary line running
>>>>>>>>> horizontally across the platform and through its center of
>>>>>>>>> gravity. In pitch motion, the leading edge of the platform
>>>>>>>>> moves vertically upwards while the rear moves vertically
>>>>>>>>> downwards, and vice versa. Platform pitch angle is the angle
>>>>>>>>> between the local horizontal and the platform's longitudinal/X
>>>>>>>>> axis. Zero pitch angle means the longitudinal axis is
>>>>>>>>> horizontal. The usual sign convention is that pitch angle is
>>>>>>>>> measured positive when the front or leading edge of the
>>>>>>>>> platform is elevated above the horizontal, negative when it is
>>>>>>>>> below the horizontal.'
>>>>>>>>>
>>>>>>>>> platform_pitch_rate (degree s-1)
>>>>>>>>> 'Standard names for "platform" describe the motion and
>>>>>>>>> orientation of the vehicle from which observations are made.
>>>>>>>>> Platforms include, but are not limited to, satellites,
>>>>>>>>> aeroplanes, ships, instruments and buoys. "Pitch" means
>>>>>>>>> rotation of the platform in the vertical plane about its
>>>>>>>>> transverse/Y axis. The transverse/Y axis, also known as the
>>>>>>>>> "lateral axis" or "pitch axis", is an imaginary line running
>>>>>>>>> horizontally across the platform and through its center of
>>>>>>>>> gravity. In pitch motion, the leading edge of the platform
>>>>>>>>> moves vertically upwards while the rear moves vertically
>>>>>>>>> downwards, and vice versa. The quantity with standard name
>>>>>>>>> platform_pitch_rate is the change per unit time in the
>>>>>>>>> quantity with standard name platform_pitch_angle.'
>>>>>>>>>
>>>>>>>>> The roll and yaw definitions would be constructed similarly.
>>>>>>>>>
>>>>>>>>> The pitch/roll/yaw names are still under discussion. I'd
>>>>>>>>> welcome further comments on these.
>>>>>>>>>
>>>>>>>>> Best wishes,
>>>>>>>>> Alison
>>>>>>>>>
>>>>>>>>> ------
>>>>>>>>> Alison Pamment???????????????????????????????? Tel: +44 1235
>>>>>>>>> 778065
>>>>>>>>> NCAS/Centre for Environmental Data Archival
>>>>>>>>> Email:alison.pamment at stfc.ac.uk
>>>>>>>>> <mailto:Email:alison.pamment at stfc.ac.uk>
>>>>>>>>> <mailto:alison.pamment at stfc.ac.uk>
>>>>>>>>> <mailto:alison.pamment at stfc.ac.uk>
>>>>>>>>> STFC Rutherford Appleton Laboratory
>>>>>>>>> R25, 2.22
>>>>>>>>> Harwell Oxford, Didcot, OX11 0QX, U.K.
>>>>>>>>>
>>>>>>>>> -----Original Message-----
>>>>>>>>> From: CF-metadata<cf-metadata-bounces at cgd.ucar.edu>
>>>>>>>>> <mailto:cf-metadata-bounces at cgd.ucar.edu>
>>>>>>>>> <mailto:cf-metadata-bounces at cgd.ucar.edu>
>>>>>>>>> <mailto:cf-metadata-bounces at cgd.ucar.edu>? On Behalf Of
>>>>>>>>> Hamilton, Steve
>>>>>>>>> Sent: 11 July 2018 10:52
>>>>>>>>> To:cf-metadata at cgd.ucar.edu
>>>>>>>>> <mailto:To:cf-metadata at cgd.ucar.edu>
>>>>>>>>> <mailto:cf-metadata at cgd.ucar.edu>
>>>>>>>>> <mailto:cf-metadata at cgd.ucar.edu>
>>>>>>>>> Subject: Re: [CF-metadata] Platform Heave
>>>>>>>>>
>>>>>>>>> Hi Nan,
>>>>>>>>>
>>>>>>>>> I agree expanding on the existing standard name descriptions
>>>>>>>>> does make sense and standardising for _rate and _angle
>>>>>>>>>
>>>>>>>>> What you suggest below seems acceptable
>>>>>>>>>
>>>>>>>>> Thanks
>>>>>>>>>
>>>>>>>>> Steve
>>>>>>>>>
>>>>>>>>> -----Original Message-----
>>>>>>>>> From: CF-metadata<cf-metadata-bounces at cgd.ucar.edu>
>>>>>>>>> <mailto:cf-metadata-bounces at cgd.ucar.edu>
>>>>>>>>> <mailto:cf-metadata-bounces at cgd.ucar.edu>
>>>>>>>>> <mailto:cf-metadata-bounces at cgd.ucar.edu>? On Behalf Of Nan
>>>>>>>>> Galbraith
>>>>>>>>> Sent: 10 July 2018 17:39
>>>>>>>>> To:cf-metadata at cgd.ucar.edu
>>>>>>>>> <mailto:To:cf-metadata at cgd.ucar.edu>
>>>>>>>>> <mailto:cf-metadata at cgd.ucar.edu>
>>>>>>>>> <mailto:cf-metadata at cgd.ucar.edu>
>>>>>>>>> Subject: Re: [CF-metadata] Platform Heave
>>>>>>>>>
>>>>>>>>> Hi Alison, Steve, and all -
>>>>>>>>>
>>>>>>>>> Since we have a little time to finalize this, could we also
>>>>>>>>> consider updating the definitions of platform_pitch_angle,
>>>>>>>>> platform_roll_angle and platform_yaw_angle?
>>>>>>>>>
>>>>>>>>> Currently, these all say 'Standard names for platform describe
>>>>>>>>> the motion and orientation of the vehicle from which
>>>>>>>>> observations are made e.g. aeroplane, ship or satellite.'
>>>>>>>>>
>>>>>>>>> John Helly pointed to the helpful Wikipedia page for ship
>>>>>>>>> motion,https://en.wikipedia.org/wiki/Ship_motions
>>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__en.wikipedia.org_wiki_Ship-5Fmotions&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=gxXkUfvVSqtWNEzxwyAeuKgEMzADzXWv2OOZtOBRAao&e=>
>>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__en.wikipedia.org_wiki_Ship-5Fmotions&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=gxXkUfvVSqtWNEzxwyAeuKgEMzADzXWv2OOZtOBRAao&e=>.
>>>>>>>>> The suggestions below are merged from different sections of
>>>>>>>>> that page, and might be a little ... long, but I'd also like
>>>>>>>>> to append something like 'Platforms include but are not
>>>>>>>>> limited to satellites, aeroplanes, ships, instruments, and
>>>>>>>>> buoys.'
>>>>>>>>>
>>>>>>>>> Pitch
>>>>>>>>> The up/down rotation of a platform about its transverse/Y
>>>>>>>>> axis. The transverse/Y axis, lateral or pitch axis is an
>>>>>>>>> imaginary line running horizontally across the platform and
>>>>>>>>> through its center of gravity. A pitch motion is an up-or-down
>>>>>>>>> movement of the bow and stern of the platform.
>>>>>>>>>
>>>>>>>>> Roll
>>>>>>>>> The tilting rotation of a platform about its longitudinal/X
>>>>>>>>> axis. The longitudinal/X axis, or roll axis, is an imaginary
>>>>>>>>> line running horizontally through the length of the platform,
>>>>>>>>> through its center of gravity, and parallel to the waterline.
>>>>>>>>> A roll motion is a side-to-side or port-starboard tilting
>>>>>>>>> motion of the superstructure around this axis.
>>>>>>>>>
>>>>>>>>> Yaw
>>>>>>>>> The turning rotation of a platform about its vertical/Z axis.
>>>>>>>>> The vertical/Z axis, or yaw axis, is an imaginary line running
>>>>>>>>> vertically through the platform and through its center of
>>>>>>>>> gravity.
>>>>>>>>> A yaw motion is a side-to side movement of the bow and stern
>>>>>>>>> of the ship.
>>>>>>>>>
>>>>>>>>> And we had something like this for heave:
>>>>>>>>> platform_heave (m) = upwards vertical displacement
>>>>>>>>>
>>>>>>>>> I suppose these could also be applied to platform_*_rates.
>>>>>>>>>
>>>>>>>>> Regards -
>>>>>>>>> Nan
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On 7/4/18 4:47 AM, Alison Pamment - UKRI STFC wrote:
>>>>>>>>>
>>>>>>>>>> Dear Steve,? > > Thank you for your message and apologies for
>>>>>>>>>> not
>>>>>>>>>> having processed
>>>>>>>>> ? > your proposals as yet. I have been working on the CMIP
>>>>>>>>> names, but > they are reaching a conclusion and I will shortly
>>>>>>>>> be looking through > the many other proposals that have been
>>>>>>>>> waiting for attention. > > A quick look through the discussion
>>>>>>>>> of your names shows they are > pretty much agreed. You need
>>>>>>>>> take no further action at this time - I > will check that the
>>>>>>>>> names and definitions are clear and consistent > with existing
>>>>>>>>> names and get back to you on the list with any final >
>>>>>>>>> comments or questions. Version 56 of the standard name table
>>>>>>>>> will be > published later today - I think we can probably
>>>>>>>>> finalise your names > in time for version 57. > > Best wishes,
>>>>>>>>> Alison
>>>>>>>>>> ________________________________
>>>>>>>>>> From: Hamilton, Steve<sj.hamilton at fugro.com>
>>>>>>>>>> <mailto:sj.hamilton at fugro.com> <mailto:sj.hamilton at fugro.com>
>>>>>>>>>> <mailto:sj.hamilton at fugro.com>
>>>>>>>>>> Sent: 03 July 2018 09:12
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Please can you advise if this standard name has now been
>>>>>>>>>> accepted and
>>>>>>>>>> when it will be included in the CF Standard Names
>>>>>>>>>>
>>>>>>>>>> If there is something else to do please let me know
>>>>>>>>>>
>>>>>>>>>> Thanks
>>>>>>>>>>
>>>>>>>>>> Steve
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> ________________________________
>>>>>>>>>> From: Jim Biard <jbiard at cicsnc.org <mailto:jbiard at cicsnc.org>
>>>>>>>>>> <mailto:jbiard at cicsnc.org>
>>>>>>>>>> <mailto:jbiard at cicsnc.org><mailto:jbiard at cicsnc.org>
>>>>>>>>>> <mailto:jbiard at cicsnc.org> <mailto:jbiard at cicsnc.org>
>>>>>>>>>> <mailto:jbiard at cicsnc.org>>
>>>>>>>>>> Sent: 01 June 2018 22:56
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Nan,
>>>>>>>>>> Thanks for pulling things back in. I very much like the idea
>>>>>>>>>> of keeping technology or specific methods out of the
>>>>>>>>>> definition if at all possible, so I like your proposal. I
>>>>>>>>>> expect we should include platform in the definition, as well
>>>>>>>>>> as an indication that this is dynamic (over time). How about
>>>>>>>>>> these definitions?
>>>>>>>>>> platform_heave (m) = upwards vertical displacement of a
>>>>>>>>>> platform over
>>>>>>>>>> a measurement time interval platform_heave_rate (m s-1) =
>>>>>>>>>> upwards rate
>>>>>>>>>> of change in vertical displacement of a platform over a
>>>>>>>>>> measurement time interval They leave out some detail but
>>>>>>>>>> capture the relative nature of the quantities.
>>>>>>>>>> (In my mind, the primary detail being left out is the 'net zero'
>>>>>>>>>> nature of the quantities, which gets back to defining the
>>>>>>>>>> 'moving-mean' sea level reference point.) Grace and peace,
>>>>>>>>>>
>>>>>>>>>> Jim
>>>>>>>>>> On 6/1/18 11:23 AM, Nan Galbraith wrote:
>>>>>>>>>> Hi all -
>>>>>>>>>>
>>>>>>>>>> The latest version is confusing to me. The term 'a platform
>>>>>>>>>> that is
>>>>>>>>>> nominally at rest' does not apply to many platforms for which
>>>>>>>>>> heave is
>>>>>>>>>> calculated; the original version of that, 'a moving object
>>>>>>>>>> above the
>>>>>>>>>> vertical level of that object when stationary' was maybe a
>>>>>>>>>> little more clear... if also a little wordy.
>>>>>>>>>>
>>>>>>>>>> And, the term? 'vertical displacement determined by integrating
>>>>>>>>>> vertical accelerations' may also not apply - I've been
>>>>>>>>>> looking at the
>>>>>>>>>> different ways heave is calculated, and there are a few:
>>>>>>>>>> 'Heave can be
>>>>>>>>>> computed from GPS RTK height measurements and from vertical
>>>>>>>>>> accelerations measured by linear accelerometers'
>>>>>>>>>>
>>>>>>>>>> Why? not keep it simple: platform_heave (m) = upwards vertical
>>>>>>>>>> displacement?? Do we need to be more specific than that?
>>>>>>>>>>
>>>>>>>>>> Thanks - Nan
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> From: Lowry, Roy K.
>>>>>>>>>> Sent: 30 May 2018 21:37
>>>>>>>>>>
>>>>>>>>>> An afterthought. Heave is conventionally positive upwards so
>>>>>>>>>> to make this clear I would add the word 'upwards' thus:
>>>>>>>>>>
>>>>>>>>>> platform_heave (m) = upwards vertical displacement determined
>>>>>>>>>> by integrating vertical accelerations of a platform that is
>>>>>>>>>> nominally at rest.
>>>>>>>>>>
>>>>>>>>>> platform_heave_rate (m s-1) = upwards vertical velocity
>>>>>>>>>> determined by integrating vertical accelerations of a
>>>>>>>>>> platform that is nominally at rest.
>>>>>>>>>>
>>>>>>>>>> Cheers. Roy.
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> ----------------------------------------------------------------------
>>>>>>>>>>
>>>>>>>>>> --
>>>>>>>>>>
>>>>>>>>>> From: Lowry, Roy K. <rkl at bodc.ac.uk <mailto:rkl at bodc.ac.uk>
>>>>>>>>>> <mailto:rkl at bodc.ac.uk>
>>>>>>>>>> <mailto:rkl at bodc.ac.uk><mailto:rkl at bodc.ac.uk>
>>>>>>>>>> <mailto:rkl at bodc.ac.uk> <mailto:rkl at bodc.ac.uk>
>>>>>>>>>> <mailto:rkl at bodc.ac.uk>
>>>>>>>>>> Sent: 30 May 2018 21:02
>>>>>>>>>>
>>>>>>>>>> Thanks Jim,
>>>>>>>>>>
>>>>>>>>>> That work for me.
>>>>>>>>>>
>>>>>>>>>> Cheers, Roy.
>>>>>>>>>>
>>>>>>>>>> ----------------------------------------------------------------------
>>>>>>>>>>
>>>>>>>>>> --
>>>>>>>>>>
>>>>>>>>>> From: Jim Biard<jbiard at cicsnc.org> <mailto:jbiard at cicsnc.org>
>>>>>>>>>> <mailto:jbiard at cicsnc.org> <mailto:jbiard at cicsnc.org>
>>>>>>>>>> Sent: 30 May 2018 18:39
>>>>>>>>>>
>>>>>>>>>> Roy,
>>>>>>>>>>
>>>>>>>>>> So, heave is integrated vertical acceleration? How about
>>>>>>>>>>
>>>>>>>>>> platform_heave (m) = vertical displacement determined by
>>>>>>>>>> integrating vertical accelerations of a platform that is
>>>>>>>>>> nominally at rest.
>>>>>>>>>>
>>>>>>>>>> platform_heave_rate (m s-1) = vertical velocity determined by
>>>>>>>>>> integrating vertical accelerations of a platform that is
>>>>>>>>>> nominally at rest.
>>>>>>>>>>
>>>>>>>>>> Jim
>>>>>>>>>>
>>>>>>>>>> On 5/27/18 5:38 AM, Lowry, Roy K. wrote:
>>>>>>>>>>
>>>>>>>>>> ????? Hi Jim,
>>>>>>>>>>
>>>>>>>>>> ????? Does
>>>>>>>>>>
>>>>>>>>>> ?????????? "Heave" is a term used to describe the vertical
>>>>>>>>>> displacement
>>>>>>>>>> ????????? of a moving object above the vertical level of that
>>>>>>>>>> object
>>>>>>>>>> ????????? when stationary.
>>>>>>>>>>
>>>>>>>>>> ????? help by getting rid of the semantically-loaded word
>>>>>>>>>> 'height'?
>>>>>>>>>> ????? If not, what would?
>>>>>>>>>>
>>>>>>>>>> ????? I think the confusion is because you are thinking of
>>>>>>>>>> heave in
>>>>>>>>>> ????? terms of position within a reference frame. To think of
>>>>>>>>>> it as the
>>>>>>>>>> ????? vertical displacement between a real platform and a
>>>>>>>>>> massless
>>>>>>>>>> ????? platform is misleading- such considerations are part of
>>>>>>>>>> the
>>>>>>>>>> ????? derivation of wave height from high frequency heave
>>>>>>>>>> measurements,
>>>>>>>>>> ????? which isn't relevant to a discussion of the raw
>>>>>>>>>> measurement. It's
>>>>>>>>>> ????? also worth bearing in mind that whilst the debate has
>>>>>>>>>> focused on
>>>>>>>>>> ????? platforms floating on the sea surface, the concept of
>>>>>>>>>> heave could
>>>>>>>>>> ????? in theory be applied to objects in the atmosphere.
>>>>>>>>>>
>>>>>>>>>> ????? In practice, heave is measured by accelerometers that
>>>>>>>>>> are usually
>>>>>>>>>> ????? combined with tilt sensors that give pitch, roll and
>>>>>>>>>> yaw. Hence,
>>>>>>>>>> ????? it is totally decoupled from any reference outside the
>>>>>>>>>> platform.
>>>>>>>>>>
>>>>>>>>>> ????? To answer your last muse, to get heave from a high
>>>>>>>>>> frequency
>>>>>>>>>> ????? height relative to datum time series the method would
>>>>>>>>>> need to
>>>>>>>>>> ????? determine the height of the object when 'stationary'.
>>>>>>>>>> In the case
>>>>>>>>>> ????? of objects on the sea, 'stationary' is considered to be
>>>>>>>>>> a flat
>>>>>>>>>> ????? calm sea (i.e. no waves), which can be approximated by
>>>>>>>>>> averaging
>>>>>>>>>> ????? the raw time series. So, heave could be approximated by
>>>>>>>>>> ????? differencing the raw and averaged data. However, I
>>>>>>>>>> can't think why
>>>>>>>>>> ????? anybody would want to do that.
>>>>>>>>>>
>>>>>>>>>> ????? Cheers, Roy.
>>>>>>>>>>
>>>>>>>>>> ----------------------------------------------------------------------
>>>>>>>>>>
>>>>>>>>>> --
>>>>>>>>>>
>>>>>>>>>> ????? From:Jim Biard<jbiard at cicsnc.org>
>>>>>>>>>> <mailto:jbiard at cicsnc.org> <mailto:jbiard at cicsnc.org>
>>>>>>>>>> <mailto:jbiard at cicsnc.org><mailto:jbiard at cicsnc.org>
>>>>>>>>>> <mailto:jbiard at cicsnc.org> <mailto:jbiard at cicsnc.org>
>>>>>>>>>> <mailto:jbiard at cicsnc.org>
>>>>>>>>>> ????? Sent: 26 May 2018 23:18
>>>>>>>>>>
>>>>>>>>>> ????? My biggest concern is that the standard name definition
>>>>>>>>>> makes it
>>>>>>>>>> ????? clear in some fashion or other that this is a measure of
>>>>>>>>>> ????? deviations from some lower frequency (or low-pass
>>>>>>>>>> filtered)
>>>>>>>>>> ????? measure of vertical position. (As are sway and surge in
>>>>>>>>>> relation
>>>>>>>>>> ????? to their corresponding horizontal coordinates.) As was
>>>>>>>>>> pointed
>>>>>>>>>> ????? out, heave is used in certain communities, so it's
>>>>>>>>>> reasonable to
>>>>>>>>>> ????? provide a standard name, but it seems rather imprecise
>>>>>>>>>> as it has
>>>>>>>>>> ????? been described so far.
>>>>>>>>>>
>>>>>>>>>> ????? If I have understood the explanations correctly, a time
>>>>>>>>>> series of
>>>>>>>>>> ????? platform height relative to a fixed datum that has
>>>>>>>>>> sufficient
>>>>>>>>>> ????? precision and frequency would fully represent the heave
>>>>>>>>>> along with
>>>>>>>>>> ????? the more slowly varying effects of tide, waves, etc. So
>>>>>>>>>> is heave,
>>>>>>>>>> ????? as usually used, the first-order instantaneous
>>>>>>>>>> difference between
>>>>>>>>>> ????? the height of an actual platform and the height of a
>>>>>>>>>> massless
>>>>>>>>>> ????? ideal platform that would maintain a fixed offset
>>>>>>>>>> relative to the
>>>>>>>>>> ????? sea surface? And, just out of curiosity, how would a
>>>>>>>>>> time series
>>>>>>>>>> ????? of instantaneous measures of height relative to a fixed
>>>>>>>>>> datum be
>>>>>>>>>> ????? separated in practice into heave and "non-heave" height?
>>>>>>>>>>
>>>>>>>>>> ????? Getting back on track, it seems to me that the
>>>>>>>>>> definition ought to
>>>>>>>>>> ????? somehow assist the reader in understanding how heave
>>>>>>>>>> relates to
>>>>>>>>>> ????? other measures of height.
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> ????? On Sat, May 26, 2018 at 3:11 AM, Lowry, Roy K. wrote:
>>>>>>>>>>
>>>>>>>>>> ????????? Dear Jim and John,
>>>>>>>>>>
>>>>>>>>>> ????????? Heave is indeed a height relative to a datum, that
>>>>>>>>>> datum being
>>>>>>>>>> ????????? the calm sea surface, which is a local short
>>>>>>>>>> interval mean sea
>>>>>>>>>> ????????? level that isn't linked into any global reference
>>>>>>>>>> system.
>>>>>>>>>> ????????? Indeed the 'datum' moves relative to the rest of
>>>>>>>>>> the world -
>>>>>>>>>> ????????? but not the platform - as tide rises and falls so
>>>>>>>>>> many would
>>>>>>>>>> ????????? prefer to call it an 'instrument zero' rather than
>>>>>>>>>> a 'datum'.
>>>>>>>>>>
>>>>>>>>>> ????????? Heave is therefore a very different measurement to
>>>>>>>>>> any sea
>>>>>>>>>> ????????? level parameter and is the raw measurement recorded
>>>>>>>>>> at high
>>>>>>>>>> ????????? (Hz to kHz) frequency as a time series by floating
>>>>>>>>>> wave
>>>>>>>>>> ????????? instruments such as waveriders and shipborne wave
>>>>>>>>>> recorders.
>>>>>>>>>> ????????? It therefore cannot be sensibly described by the
>>>>>>>>>> same or
>>>>>>>>>> ????????? similar Standard Name as a measurement of height
>>>>>>>>>> above a
>>>>>>>>>> ????????? globally referenced datum like long-term mean sea
>>>>>>>>>> level or
>>>>>>>>>> ????????? geoid. Whilst the Standard Name could be
>>>>>>>>>> 'platform_height_above_calm_sea_surface' or
>>>>>>>>>> 'platform_height_above_stationary_position' I would argue that
>>>>>>>>>> ????????? 'heave' is a term from the same domain vocabulary
>>>>>>>>>> as 'pitch',
>>>>>>>>>> ????????? 'roll' and 'yaw' and therefore should be used.
>>>>>>>>>>
>>>>>>>>>> ????????? John is right to point out that the heave
>>>>>>>>>> measurement is
>>>>>>>>>> ????????? affected by the nature of the platform with a
>>>>>>>>>> 250,000 tonne
>>>>>>>>>> ????????? supertanker moving up and down much less than a
>>>>>>>>>> rowing boat in
>>>>>>>>>> ????????? a given wave climate, especially a wind sea. That
>>>>>>>>>> was what was
>>>>>>>>>> ????????? behind the SBWR corrections based on platform
>>>>>>>>>> dimensions set
>>>>>>>>>> ????????? up by Laurie Draper and Tom Tucker back in the 1980s.
>>>>>>>>>>
>>>>>>>>>> ????????? Cheers, Roy.
>>>>>>>>>>
>>>>>>>>>> ----------------------------------------------------------------------
>>>>>>>>>>
>>>>>>>>>> --
>>>>>>>>>>
>>>>>>>>>> ????????? From: John Helly<hellyj at ucsd.edu>
>>>>>>>>>> <mailto:hellyj at ucsd.edu> <mailto:hellyj at ucsd.edu>
>>>>>>>>>> <mailto:hellyj at ucsd.edu>
>>>>>>>>>> ????????? Sent: 26 May 2018 04:48
>>>>>>>>>>
>>>>>>>>>> ????????? Can't let go of this yet.
>>>>>>>>>>
>>>>>>>>>> ????????? If you think about the inverse problem of deriving
>>>>>>>>>> the sea
>>>>>>>>>> ????????? surface elevation from the heave you would have to
>>>>>>>>>> account for
>>>>>>>>>> ????????? the latency of ship motion relative to the
>>>>>>>>>> sea-surface. A
>>>>>>>>>> ????????? wave passing under a ship induces motions that are not
>>>>>>>>>> ????????? instantaneous either in attack or decay.
>>>>>>>>>>
>>>>>>>>>> ????????? J.
>>>>>>>>>>
>>>>>>>>>> ????????? On 5/25/18 20:42, John Helly wrote:
>>>>>>>>>>
>>>>>>>>>> ????????????? I believe it's a synonym within the oceanographic
>>>>>>>>>> ????????????? community for the vertical motion of an
>>>>>>>>>> ocean-going platform.
>>>>>>>>>>
>>>>>>>>>> https://en.wikipedia.org/wiki/Ship_motions
>>>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__en.wikipedia.org_wiki_Ship-5Fmotions&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=gxXkUfvVSqtWNEzxwyAeuKgEMzADzXWv2OOZtOBRAao&e=>
>>>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__en.wikipedia.org_wiki_Ship-5Fmotions&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=gxXkUfvVSqtWNEzxwyAeuKgEMzADzXWv2OOZtOBRAao&e=>
>>>>>>>>>>
>>>>>>>>>> ????????????? Ship motions - Wikipedia
>>>>>>>>>> <https://en.wikipedia.org/wiki/Ship_motions>
>>>>>>>>>> <https://en.wikipedia.org/wiki/Ship_motions>
>>>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__en.wikipedia.org_wiki_Ship-5Fmotions&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=gxXkUfvVSqtWNEzxwyAeuKgEMzADzXWv2OOZtOBRAao&e=>
>>>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__en.wikipedia.org_wiki_Ship-5Fmotions&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=gxXkUfvVSqtWNEzxwyAeuKgEMzADzXWv2OOZtOBRAao&e=><https://en.wikipedia.org/
>>>>>>>>>> wiki/Ship_motions>
>>>>>>>>>> <https://en.wikipedia.org/wiki/Ship_motions>
>>>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__en.wikipedia.org_wiki_Ship-5Fmotions&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=gxXkUfvVSqtWNEzxwyAeuKgEMzADzXWv2OOZtOBRAao&e=>
>>>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__en.wikipedia.org_wiki_Ship-5Fmotions&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=gxXkUfvVSqtWNEzxwyAeuKgEMzADzXWv2OOZtOBRAao&e=>
>>>>>>>>>>
>>>>>>>>>> ????????????? en.wikipedia.org
>>>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__en.wikipedia.org_&d=DwMFaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=J2x5E3dUpn954rPN8-v-TFQOZiyobvfd2MaoRgJ8_Zg&s=vxsAvAgVXgUOS72MntIS3EeYgiYMynA6M4SbIbilSDk&e=>
>>>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__en.wikipedia.org_&d=DwMFaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=J2x5E3dUpn954rPN8-v-TFQOZiyobvfd2MaoRgJ8_Zg&s=vxsAvAgVXgUOS72MntIS3EeYgiYMynA6M4SbIbilSDk&e=>
>>>>>>>>>> <http://en.wikipedia.org> <http://en.wikipedia.org>
>>>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__en.wikipedia.org&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=tpfIR7_HY7_jSNmPjinu0I6CgCY2PCb65KOJTYnwrFg&e=>
>>>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__en.wikipedia.org&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=tpfIR7_HY7_jSNmPjinu0I6CgCY2PCb65KOJTYnwrFg&e=><http://en.wikipedia.org>
>>>>>>>>>> <http://en.wikipedia.org>
>>>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__en.wikipedia.org&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=tpfIR7_HY7_jSNmPjinu0I6CgCY2PCb65KOJTYnwrFg&e=>
>>>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__en.wikipedia.org&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=tpfIR7_HY7_jSNmPjinu0I6CgCY2PCb65KOJTYnwrFg&e=>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> ????????????? Ship motions are defined by the six degrees of
>>>>>>>>>> freedom
>>>>>>>>>> ????????????? that a ship, boat or any other craft can
>>>>>>>>>> experience.
>>>>>>>>>>
>>>>>>>>>> ????????????? Could just be jargon but it strike me as more
>>>>>>>>>> complex:
>>>>>>>>>> ????????????? nonetheless a vertical position relative to a
>>>>>>>>>> datum, but
>>>>>>>>>> ????????????? the buoyancy, stability and momentum of the
>>>>>>>>>> platform are
>>>>>>>>>> ????????????? implied as part of the dynamics.? It seems that
>>>>>>>>>> the datum
>>>>>>>>>> ????????????? is not a geophysical one alone but confounded
>>>>>>>>>> with the
>>>>>>>>>> ????????????? 'normal' waterline for a platform so it may be
>>>>>>>>>> relative to
>>>>>>>>>> ????????????? the water level in which the platform is
>>>>>>>>>> embedded. That's
>>>>>>>>>> ????????????? a tough one. Two different platforms on the
>>>>>>>>>> same sea
>>>>>>>>>> ????????????? surface would have different 'heave', for example.
>>>>>>>>>>
>>>>>>>>>> ????????????? J.
>>>>>>>>>>
>>>>>>>>>> ????????????? On 5/25/18 19:54, Jim Biard wrote:
>>>>>>>>>>
>>>>>>>>>> ????????????????? Hi.
>>>>>>>>>>
>>>>>>>>>> ????????????????? I get and endorse the need for pitch, roll,
>>>>>>>>>> and yaw,
>>>>>>>>>> ????????????????? but I remain perplexed about heave. How is
>>>>>>>>>> a time
>>>>>>>>>> ????????????????? series of 'heave' different from a time
>>>>>>>>>> series of
>>>>>>>>>> ????????????????? height relative to some vertical datum?
>>>>>>>>>> I've yet to
>>>>>>>>>> ????????????????? see a proposed definition that convinces me
>>>>>>>>>> that this
>>>>>>>>>> ????????????????? is a uniquely different quantity.
>>>>>>>>>>
>>>>>>>>>> ????????????????? Grace and peace,
>>>>>>>>>>
>>>>>>>>>> ????????????????? Jim
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> ????????????????? On Fri, May 25, 2018 at 7:28 AM, Lowry, Roy K.
>>>>>>>>>> ????????????????? <rkl at bodc.ac.uk <mailto:rkl at bodc.ac.uk>
>>>>>>>>>> <mailto:rkl at bodc.ac.uk>
>>>>>>>>>> <mailto:rkl at bodc.ac.uk><mailto:rkl at bodc.ac.uk>
>>>>>>>>>> <mailto:rkl at bodc.ac.uk> <mailto:rkl at bodc.ac.uk>
>>>>>>>>>> <mailto:rkl at bodc.ac.uk> wrote:
>>>>>>>>>>
>>>>>>>>>> ????????????????????? Dear All,
>>>>>>>>>>
>>>>>>>>>> ????????????????????? I agree with Nan that definitions of
>>>>>>>>>> pitch roll
>>>>>>>>>> ????????????????????? and yaw would improve the existing
>>>>>>>>>> Standard Name
>>>>>>>>>> ????????????????????? definitions. I also agree with using
>>>>>>>>>> the existing
>>>>>>>>>> ????????????????????? orientation Standard Names for ADCPs
>>>>>>>>>> and that the
>>>>>>>>>> ????????????????????? 'platform' definition wording could
>>>>>>>>>> make this
>>>>>>>>>> ????????????????????? clearer. However, such an enhancements
>>>>>>>>>> should be
>>>>>>>>>> ????????????????????? submitted as a separate proposal and
>>>>>>>>>> not be
>>>>>>>>>> ????????????????????? considered as part of Steve's proposal.
>>>>>>>>>>
>>>>>>>>>> ????????????????????? Cheers, Roy.
>>>>>>>>>>
>>>>>>>>>> ----------------------------------------------------------------------
>>>>>>>>>>
>>>>>>>>>> --
>>>>>>>>>>
>>>>>>>>>> ????????????????????? From:? Nan
>>>>>>>>>> Galbraith<ngalbraith at whoi.edu> <mailto:ngalbraith at whoi.edu>
>>>>>>>>>> <mailto:ngalbraith at whoi.edu> <mailto:ngalbraith at whoi.edu>
>>>>>>>>>> ????????????????????? Sent: 25 May 2018 14:46
>>>>>>>>>>
>>>>>>>>>> ????????????????????? I'd really like to see pitch, roll and
>>>>>>>>>> yaw defined
>>>>>>>>>> ????????????????????? in the CF standard name table; currently
>>>>>>>>>> ????????????????????? the definitions only say 'Standard
>>>>>>>>>> names for
>>>>>>>>>> ????????????????????? platform describe the motion and
>>>>>>>>>> orientation
>>>>>>>>>> ????????????????????? of the vehicle from which observations
>>>>>>>>>> are made
>>>>>>>>>> ????????????????????? e.g. aeroplane, ship or satellite.'
>>>>>>>>>>
>>>>>>>>>> ????????????????????? Also, not to get too far into the
>>>>>>>>>> weeds, but many
>>>>>>>>>> ????????????????????? of the platform terms are important
>>>>>>>>>> ????????????????????? for instruments like ADCPs, so I'd just
>>>>>>>>>> like to
>>>>>>>>>> ????????????????????? confirm that these definitions - and
>>>>>>>>>> ????????????????????? the names themselves - can be used to
>>>>>>>>>> describe
>>>>>>>>>> ????????????????????? instruments, not just vehicles
>>>>>>>>>> ????????????????????? 'e.g. aeroplane, ship or satellite'. We
>>>>>>>>>> already
>>>>>>>>>> ????????????????????? use pitch roll and yaw for these
>>>>>>>>>> ????????????????????? instruments on surface moorings, and I
>>>>>>>>>> hope (and
>>>>>>>>>> ????????????????????? assume) this is legal.
>>>>>>>>>>
>>>>>>>>>> ????????????????????? Thanks - Nan Galbraith
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> ????????????????????? On 5/25/18 8:53 AM, Lowry, Roy K. wrote:
>>>>>>>>>> ????????????????????? >
>>>>>>>>>> ????????????????????? >
>>>>>>>>>> ????????????????????? > Dear Steve,
>>>>>>>>>> ????????????????????? >
>>>>>>>>>> ????????????????????? >
>>>>>>>>>> ????????????????????? > One of the reasons I was interested
>>>>>>>>>> in your
>>>>>>>>>> ????????????????????? definitions was your
>>>>>>>>>> ????????????????????? > perspective on the datum (i.e. zero
>>>>>>>>>> value) for
>>>>>>>>>> ????????????????????? heave. The datum
>>>>>>>>>> ????????????????????? > 'mean_sea_level' is well used in CF,
>>>>>>>>>> but with
>>>>>>>>>> ????????????????????? the definition 'time
>>>>>>>>>> ????????????????????? > mean of sea surface elevation at a given
>>>>>>>>>> ????????????????????? location over an arbitrary
>>>>>>>>>> ????????????????????? > period sufficient to eliminate the tidal
>>>>>>>>>> ????????????????????? signals.' This is obviously
>>>>>>>>>> ????????????????????? > not appropriate for platform heave
>>>>>>>>>> which doesn't
>>>>>>>>>> ????????????????????? take any account of
>>>>>>>>>> ????????????????????? > the state of the tide and so I would
>>>>>>>>>> exclude
>>>>>>>>>> ????????????????????? 'mean_sea_level' from the
>>>>>>>>>> ????????????????????? > Standard Name.
>>>>>>>>>> ????????????????????? >
>>>>>>>>>> ????????????????????? >
>>>>>>>>>> ????????????????????? > I think my preference would be to
>>>>>>>>>> keep the term
>>>>>>>>>> ????????????????????? 'heave' as we already
>>>>>>>>>> ????????????????????? > have 'pitch', 'yaw' and 'roll', giving:
>>>>>>>>>> ????????????????????? >
>>>>>>>>>> ????????????????????? >
>>>>>>>>>> ????????????????????? > platform_heave (m)
>>>>>>>>>> ????????????????????? >
>>>>>>>>>> ????????????????????? >
>>>>>>>>>> ????????????????????? > Standard names for platform describe
>>>>>>>>>> the motion
>>>>>>>>>> ????????????????????? and orientation of the
>>>>>>>>>> ????????????????????? > vehicle from which observations are
>>>>>>>>>> made e.g.
>>>>>>>>>> ????????????????????? aeroplane, ship or
>>>>>>>>>> ????????????????????? > satellite. "Heave" is a term used to
>>>>>>>>>> describe
>>>>>>>>>> ????????????????????? the vertical
>>>>>>>>>> ????????????????????? > displacement of the platform above
>>>>>>>>>> its position
>>>>>>>>>> ????????????????????? when not moving.
>>>>>>>>>> ????????????????????? >
>>>>>>>>>> ????????????????????? >
>>>>>>>>>> ????????????????????? > tendency_of_platform_heave (m s-1)
>>>>>>>>>> ????????????????????? >
>>>>>>>>>> ????????????????????? >
>>>>>>>>>> ????????????????????? > Standard names for platform describe
>>>>>>>>>> the motion
>>>>>>>>>> ????????????????????? and orientation of the
>>>>>>>>>> ????????????????????? > vehicle from which observations are
>>>>>>>>>> made e.g.
>>>>>>>>>> ????????????????????? aeroplane, ship or
>>>>>>>>>> ????????????????????? > satellite. "Tendency_of_X" means
>>>>>>>>>> derivative of X
>>>>>>>>>> ????????????????????? with respect to time.
>>>>>>>>>> ????????????????????? > "Heave" is a term used to describe
>>>>>>>>>> the vertical
>>>>>>>>>> ????????????????????? displacement of the
>>>>>>>>>> ????????????????????? > platform above its position when not
>>>>>>>>>> moving.
>>>>>>>>>> ????????????????????? >
>>>>>>>>>> ????????????????????? >
>>>>>>>>>> ????????????????????? > What do you think?
>>>>>>>>>> ????????????????????? >
>>>>>>>>>> ????????????????????? >
>>>>>>>>>> ????????????????????? > Cheers, Roy.
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> *******************************************************
>>>>>>>>> * Nan Galbraith??????? Information Systems Specialist *
>>>>>>>>> * Upper Ocean Processes Group Mail Stop 29 *
>>>>>>>>> * Woods Hole Oceanographic Institution??????????????? *
>>>>>>>>> * Woods Hole, MA 02543???????????????? (508) 289-2444 *
>>>>>>>>> *******************************************************
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> _______________________________________________
>>>>>>>>> CF-metadata mailing list
>>>>>>>>> CF-metadata at cgd.ucar.edu <mailto:CF-metadata at cgd.ucar.edu>
>>>>>>>>> <mailto:CF-metadata at cgd.ucar.edu>
>>>>>>>>> <mailto:CF-metadata at cgd.ucar.edu>
>>>>>>>>> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
>>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__mailman.cgd.ucar.edu_mailman_listinfo_cf-2Dmetadata&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=CiiBFNLLM7XQeXxCJzRPmC0xdxNR8BhH_tI-syw7_5k&e=>
>>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__mailman.cgd.ucar.edu_mailman_listinfo_cf-2Dmetadata&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=CiiBFNLLM7XQeXxCJzRPmC0xdxNR8BhH_tI-syw7_5k&e=>
>>>>>>>>> _______________________________________________
>>>>>>>>> CF-metadata mailing list
>>>>>>>>> CF-metadata at cgd.ucar.edu <mailto:CF-metadata at cgd.ucar.edu>
>>>>>>>>> <mailto:CF-metadata at cgd.ucar.edu>
>>>>>>>>> <mailto:CF-metadata at cgd.ucar.edu>
>>>>>>>>> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
>>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__mailman.cgd.ucar.edu_mailman_listinfo_cf-2Dmetadata&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=CiiBFNLLM7XQeXxCJzRPmC0xdxNR8BhH_tI-syw7_5k&e=>
>>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__mailman.cgd.ucar.edu_mailman_listinfo_cf-2Dmetadata&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=CiiBFNLLM7XQeXxCJzRPmC0xdxNR8BhH_tI-syw7_5k&e=>
>>>>>>>>>
>>>>>>>>> _______________________________________________
>>>>>>>>> CF-metadata mailing list
>>>>>>>>> CF-metadata at cgd.ucar.edu <mailto:CF-metadata at cgd.ucar.edu>
>>>>>>>>> <mailto:CF-metadata at cgd.ucar.edu>
>>>>>>>>> <mailto:CF-metadata at cgd.ucar.edu>
>>>>>>>>> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
>>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__mailman.cgd.ucar.edu_mailman_listinfo_cf-2Dmetadata&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=CiiBFNLLM7XQeXxCJzRPmC0xdxNR8BhH_tI-syw7_5k&e=>
>>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__mailman.cgd.ucar.edu_mailman_listinfo_cf-2Dmetadata&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=CiiBFNLLM7XQeXxCJzRPmC0xdxNR8BhH_tI-syw7_5k&e=>
>>>>>>>>> _______________________________________________
>>>>>>>>> CF-metadata mailing list
>>>>>>>>> CF-metadata at cgd.ucar.edu <mailto:CF-metadata at cgd.ucar.edu>
>>>>>>>>> <mailto:CF-metadata at cgd.ucar.edu>
>>>>>>>>> <mailto:CF-metadata at cgd.ucar.edu>
>>>>>>>>> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
>>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__mailman.cgd.ucar.edu_mailman_listinfo_cf-2Dmetadata&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=CiiBFNLLM7XQeXxCJzRPmC0xdxNR8BhH_tI-syw7_5k&e=>
>>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__mailman.cgd.ucar.edu_mailman_listinfo_cf-2Dmetadata&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=CiiBFNLLM7XQeXxCJzRPmC0xdxNR8BhH_tI-syw7_5k&e=>
>>>>>>>>
>>>>>>>> --
>>>>>>>> CICS-NC
>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.cicsnc.org_&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=8lHJz6dH2XHkNWXpzlPzw9Vx2dTDwQ5Ow4uXUIZBPZU&e=>
>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.cicsnc.org_&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=8lHJz6dH2XHkNWXpzlPzw9Vx2dTDwQ5Ow4uXUIZBPZU&e=>Visit
>>>>>>>> us on
>>>>>>>> Facebook
>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.facebook.com_cicsnc&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=oNLIHSVmCaO1TkAm6PFzxmtZ9Wz1oyQ9pzpsG7e3obE&e=>
>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.facebook.com_cicsnc&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=oNLIHSVmCaO1TkAm6PFzxmtZ9Wz1oyQ9pzpsG7e3obE&e=>
>>>>>>>> ????*Jim Biard*
>>>>>>>> *Research Scholar*
>>>>>>>> Cooperative Institute for Climate and Satellites
>>>>>>>> NC<https://urldefense.proofpoint.com/v2/url?u=http-3A__cicsnc.org_&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=J44MNoS3a3tRZadexG7eUT9VHnim-C1Q38Gg053klgA&e=>
>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__cicsnc.org_&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=J44MNoS3a3tRZadexG7eUT9VHnim-C1Q38Gg053klgA&e=>
>>>>>>>> North Carolina State
>>>>>>>> University<https://urldefense.proofpoint.com/v2/url?u=http-3A__ncsu.edu_&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=VFiaA8MAm8rNiE-oSavyuVxEWBUhGmkoZLFec_ZFYlo&e=>
>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__ncsu.edu_&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=VFiaA8MAm8rNiE-oSavyuVxEWBUhGmkoZLFec_ZFYlo&e=>
>>>>>>>> NOAA National Centers for Environmental
>>>>>>>> Information<https://urldefense.proofpoint.com/v2/url?u=http-3A__ncdc.noaa.gov_&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=F-xQ7THSSP276ClTb8arUk9hFLSJ8wJhSEKZwbfQNVM&e=>
>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__ncdc.noaa.gov_&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=F-xQ7THSSP276ClTb8arUk9hFLSJ8wJhSEKZwbfQNVM&e=>
>>>>>>>> /formerly NOAA?s National Climatic Data Center/
>>>>>>>> 151 Patton Ave, Asheville, NC 28801
>>>>>>>> e:jbiard at cicsnc.org <mailto:e:jbiard at cicsnc.org>
>>>>>>>> <mailto:jbiard at cicsnc.org> <mailto:jbiard at cicsnc.org>
>>>>>>>> o: +1 828 271 4900
>>>>>>>>
>>>>>>>> /Connect with us on Facebook forclimate
>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.facebook.com_NOAANCEIclimate&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=-I3y1iTURs4K97NhqWoXlP5uoaMBi-jvEE2diIwFODg&e=>
>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.facebook.com_NOAANCEIclimate&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=-I3y1iTURs4K97NhqWoXlP5uoaMBi-jvEE2diIwFODg&e=>andocean
>>>>>>>> and geophysics
>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.facebook.com_NOAANCEIoceangeo&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=8ApaGoSCCCRFwF6j3evIWD8um0l0N0Avdz4cny_m_Zs&e=>
>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.facebook.com_NOAANCEIoceangeo&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=8ApaGoSCCCRFwF6j3evIWD8um0l0N0Avdz4cny_m_Zs&e=>information,
>>>>>>>> and follow us on Twitter at at NOAANCEIclimate
>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__twitter.com_NOAANCEIclimate&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=zpNjm0rVsNRvcMCt5onLOEFwqoxJwb1z4nrtZXIDOn0&e=>
>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__twitter.com_NOAANCEIclimate&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=zpNjm0rVsNRvcMCt5onLOEFwqoxJwb1z4nrtZXIDOn0&e=>and at NOAANCEIocngeo
>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__twitter.com_NOAANCEIocngeo&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=GcsHw9fQDVUMabWDrGLrdXOZLmCJ5UWXcapPHOUcwdE&e=>
>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__twitter.com_NOAANCEIocngeo&d=DwMDaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=fsDk1eg5rM-so0h_XCTK_Pl1w5MGnQK88vuvHcbhUUI&s=GcsHw9fQDVUMabWDrGLrdXOZLmCJ5UWXcapPHOUcwdE&e=>./
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> CF-metadata mailing list
>>>>>>>> CF-metadata at cgd.ucar.edu <mailto:CF-metadata at cgd.ucar.edu>
>>>>>>>> <mailto:CF-metadata at cgd.ucar.edu>
>>>>>>>> <mailto:CF-metadata at cgd.ucar.edu>
>>>>>>>> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__mailman.cgd.ucar.edu_mailman_listinfo_cf-2Dmetadata&d=DwMFaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=J2x5E3dUpn954rPN8-v-TFQOZiyobvfd2MaoRgJ8_Zg&s=7WZod_Yl4Ny2ikX4Vb__7Og8ciU0cQVZe4z5EPcKMe0&e=>
>>>>>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__mailman.cgd.ucar.edu_mailman_listinfo_cf-2Dmetadata&d=DwMFaQ&c=qKdtBuuu6dQK9MsRUVJ2DPXW6oayO8fu4TfEHS8sGNk&r=Vm7o2ZGxPkkqRuPs8nVMVQ&m=J2x5E3dUpn954rPN8-v-TFQOZiyobvfd2MaoRgJ8_Zg&s=7WZod_Yl4Ny2ikX4Vb__7Og8ciU0cQVZe4z5EPcKMe0&e=>
>>>>>>>
>>>>>>> --
>>>>>>> Kenneth E. Kehoe
>>>>>>> ?? Research Associate - University of Oklahoma
>>>>>>> ?? Cooperative Institute for Mesoscale Meteorological Studies
>>>>>>> ?? ARM Climate Research Facility - Data Quality Office
>>>>>>> e-mail:kkehoe at ou.edu <mailto:e-mail:kkehoe at ou.edu>
>>>>>>> <mailto:kkehoe at ou.edu> <mailto:kkehoe at ou.edu>? | Office:
>>>>>>> 303-497-4754 | Cell: 405-826-0299
>>>>>>>
>>>>>>>
>>>>> --
>>>>> Kenneth E. Kehoe
>>>
>>
>
> --
> CICS-NC <http://www.cicsnc.org/>Visit us on
> Facebook <http://www.facebook.com/cicsnc> *Jim Biard*
> *Research Scholar*
> Cooperative Institute for Climate and Satellites NC <http://cicsnc.org/>
> North Carolina State University <http://ncsu.edu/>
> NOAA National Centers for Environmental Information
> <http://ncdc.noaa.gov/>
> /formerly NOAA?s National Climatic Data Center/
> 151 Patton Ave, Asheville, NC 28801
> e: jbiard at cicsnc.org <mailto:jbiard at cicsnc.org>
> o: +1 828 271 4900
>
> /Connect with us on Facebook for climate
> <https://www.facebook.com/NOAANCEIclimate> and ocean and geophysics
> <https://www.facebook.com/NOAANCEIoceangeo> information, and follow us
> on Twitter at _at_NOAANCEIclimate <https://twitter.com/NOAANCEIclimate>
> and _at_NOAANCEIocngeo <https://twitter.com/NOAANCEIocngeo>. /
>
>
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--
CICS-NC <http://www.cicsnc.org/> Visit us on
Facebook <http://www.facebook.com/cicsnc> *Jim Biard*
*Research Scholar*
Cooperative Institute for Climate and Satellites NC <http://cicsnc.org/>
North Carolina State University <http://ncsu.edu/>
NOAA National Centers for Environmental Information <http://ncdc.noaa.gov/>
/formerly NOAA?s National Climatic Data Center/
151 Patton Ave, Asheville, NC 28801
e: jbiard at cicsnc.org <mailto:jbiard at cicsnc.org>
o: +1 828 271 4900
/Connect with us on Facebook for climate
<https://www.facebook.com/NOAANCEIclimate> and ocean and geophysics
<https://www.facebook.com/NOAANCEIoceangeo> information, and follow us
on Twitter at _at_NOAANCEIclimate <https://twitter.com/NOAANCEIclimate> and
_at_NOAANCEIocngeo <https://twitter.com/NOAANCEIocngeo>. /
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