Peter:
Following is some actionable feedback and questions on ?Satellite Names and Phrases?:?
(1)
A nit ?
The alternative name for satellite, platform, could be an airplane, buoy, etc. Recommend using ?space_based_platform? or ?space_platform? if there is a desire to make it satellite specific, or, propose adding it to the standard set of special phrases.
(2)
Rather than using satellite_point, recommend a more widely used, familiar term like ?satellite_subpoint? or ?subsatellite_point?.
(3)
For the term ?measurement_point?, could you explain the motive for defining this as a satellite-specific phrase ?
(4)
?toa? is already a special standard prefix that can be used in the construction of standard names. Why is there a need to add it as a satellite-specific phrase ?
Following is a question on the submission 1 (satellite/platform related) standard_names:
(1) For the standard names, platform_measurement_latitude, platform_measurement_longitude, and platform_measurement_altitude:
what is the rationale for identifying the coordinate system in the variable?s comment attribute instead of using the CF grid mapping constructs ? (See para 5.6 in CF standard).
++++
We are still formulating feedback for the submission 2 standard_names, and will post that feedback early next week.
Note that I am working on the GOES-R program, and we fully understand the need for prompt and actionable feedback. We will fully comply with your request.
Also note that we have some standard_name (and units) that we would like to get added to CF, and will be pursuing this in the days and weeks ahead.
very respectfully,
randy
On Mar 13, 2013, at 11:00 AM, Peter Miu wrote:
> Hi,
>
> The mailing list takes out the HTML for the tables I submitted in the message so I've reformatted them:
>
> The following names are used to identify data acquired from satellites in the CF satellite standard names conventions.
>
> Name ----- Alternative Name ----- Comment
>
> satellite -- platform ------------ The object on which the instruments/sensors are attached.
>
> instrument -- sensor -------------- The observing device, mounted on the satellite/platform.
>
> detector --------------------------- The element of the instrument observing a specific band.
>
> Band ------- channel --------------- The spectral region covered by the observation. Channel may be used as a subset within a band.
>
>
>
>
> Phrase ----------------- Meaning, Please provide a better definition if you can.
>
> satellite_point -------- The absolute latitude and longitude of the satellite/platform.
>
> measurement_point ------ The geo-referenced latitude and longitude onto a standard coordinate system where the measurement is taken.
>
> Toa -------------------- top of atmosphere, see Surface in the Qualifications section for more information.
>
> Other suggestions are welcome.
>
> Sorry for the inconvenience.
>
> Regards,
>
> Pete.
>
> -----Original Message-----
> From: cf-satellite-bounces at unidata.ucar.edu [mailto:cf-satellite-bounces at unidata.ucar.edu] On Behalf Of cf-satellite-request at unidata.ucar.edu
> Sent: Wednesday, March 13, 2013 3:54 PM
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> Subject: cf-satellite Digest, Vol 29, Issue 1
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> 1. Re: cf-satellite Digest, Vol 28, Issue 10 (Peter Miu)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 13 Mar 2013 15:53:52 +0100
> From: Peter Miu <Peter.Miu at eumetsat.int>
> To: "cf-satellite at unidata.ucar.edu" <cf-satellite at unidata.ucar.edu>
> Subject: Re: [cf-satellite] cf-satellite Digest, Vol 28, Issue 10
> Message-ID:
> <354F36C3E59AE94285336EF9BD449F6F452B8AA0 at EXW10.eum.root.eumetsat.int>
> Content-Type: text/plain; charset="windows-1252"
>
> Hi,
>
>
>
> As mentioned in my Email 2 weeks ago, I attended the annual GSICS joint meeting attended by EUMETSAT, NOAA, NASA, CMA, JMA, and KMA; note our work here is visible to the WMO and CGMS. We discussed the process for submitting CF satellite standard name proposals and the already submitted proposed satellite CF standard names by NOAA and EUMETSAT, and here is what I can report.
>
>
>
> Based on our experience, the submission of satellite CF standard name proposals is a long, difficult and frustrating process. Feedback is often received that leave the proposed CF updates in limbo as questions, opinions and taste are presented that do not have an answer or solution without further discussion.
>
>
>
> In addition to this, the concept of providing a satellite vocabulary in the standard names guidelines would help with defining and clarifying the proposed satellite standard names.
>
>
>
> Therefore I suggest the following:
>
>
>
> 1. Feedback to proposals shall provide comments/opinions AND possible solutions to the issues raised in these comments/opinions to allow the submissions to be promptly reworked. Feedback leading to limbo state can be ignored (I?m sorry for the bluntness of this suggestion but we have to be efficient and pragmatic in how to use our time).
>
>
>
> 2. The following terms shall be included in the Guidelines for Construction of CF Standard Names
>
> (see: http://cf-pcmdi.llnl.gov/documents/cf-standard-names/guidelines). I suggest a new section under Chemical Species called ?Satellite Names and Phrases?
> Satellite Names and Phrases
> The following names are used to identify data acquired from satellites in the CF satellite standard names conventions.
> Name
>
> Alternative Name
>
> Comment
>
> satellite
>
> platform
>
> The object on which the instruments/sensors are attached.
>
> instrument
>
> sensor
>
> The observing device, mounted on the satellite/platform.
>
> detector
>
> The element of the instrument observing a specific band.
>
> band
>
> channel
>
> The spectral region covered by the observation.
> Channel may be used as a subset within a band.
>
>
> Phrase
>
> Meaning ? Please provide a better definition if you can.
>
> satellite_point
>
> The absolute latitude and longitude of the satellite/platform.
>
> measurement_point
>
> The geo-referenced latitude and longitude onto a standard coordinate system where the measurement is taken.
>
> toa
>
> top of atmosphere ? see Surface in the Qualifications section for more information.
>
> Other suggestions are welcome.
> For the proposed names submitted by EUMETSAT, the re-worked versions are to split them into 3 separate submissions to allow easier acceptance and these are as follows:
> Submission 1 (Satellite / Platform related):
>
> azimuth_angle
>
> * degrees
>
> * Azimuth angle is the angle measured towards the east, from north, along the astronomical horizon to the intersection of the great circle passing through the point and the astronomical zenith with the astronomical horizon.
>
>
>
> platform_measurement_latitude
>
> * degrees_north
>
> * Latitude of the data acquired at the measurement point ? coordinate system shall be defined in the variable comment attribute.
>
>
>
> platform_measurement_longitude
>
> * degrees_east
>
> * Longitude of the data acquired at the measurement point ? coordinate system shall be defined in the variable comment attribute.
>
>
>
> platform_measurement_altitude
>
> * m
>
> * Altitude of the platform above mean sea level.
> Submission 2 (Band related):
>
> band_spectral_width
>
> * cm-1
>
> * Bandwidth of the spectral channel taken by the detector Submission 3 (Top of Atmosphere related):
>
> toa_spectral_irradiance
>
> * mW m-2 (cm-1)-1
>
> * Irradiance which is relevant for any sensor measuring in the UV-VIS and NIR. This parameter is reported by integrating over the whole sphere.
>
>
>
> toa_spectral_reflectance
>
> * 1 (dimensionless)
>
> * Ratio of radiance to irradiance I/I0, reflection from a thick layer where the layer, here the atmosphere, is part of the reflection's property.
>
>
>
> toa_outgoing_inband_radiance
>
> * mW m-2 sr-1
>
> * "outgoing" means emitted toward outer space; the radiance is integrated over a discrete band.
>
>
>
> toa_reflectance
>
> * 1
>
> * Reflectance is the ratio of the energy of the reflected to the incident radiation at the top of atmosphere. A coordinate variable of radiation_wavelength or radiation_frequency can be used to specify the wavelength or frequency respectively, of the radiation.
>
>
>
>
>
> If no major issues (note issues should come with suggested solutions) on the proposals have been received within two weeks, I will assume we as a community think the proposals would benefit users and developers of satellite data, and I shall submit them for official acceptance.
>
>
>
> Regards,
>
>
>
> Peter Miu
>
> Data Services Operations Engineer
>
>
>
> EUMETSAT
>
> EUMETSAT Allee 1
>
> 64295 Darmstadt
>
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>
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>
> -----Original Message-----
> From: cf-satellite-bounces at unidata.ucar.edu [mailto:cf-satellite-bounces at unidata.ucar.edu] On Behalf Of cf-satellite-request at unidata.ucar.edu
> Sent: Wednesday, February 27, 2013 8:00 PM
> To: cf-satellite at unidata.ucar.edu
> Subject: cf-satellite Digest, Vol 28, Issue 10
>
>
>
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> 1. Re: cf-satellite Digest, Vol 28, Issue 9 (Peter Miu)
>
>
>
>
>
> ----------------------------------------------------------------------
>
>
>
> Message: 1
>
> Date: Wed, 27 Feb 2013 09:55:22 +0100
>
> From: Peter Miu <Peter.Miu at eumetsat.int<mailto:Peter.Miu at eumetsat.int>>
>
> To: "'cf-satellite at unidata.ucar.edu'" <cf-satellite at unidata.ucar.edu<mailto:cf-satellite at unidata.ucar.edu>>
>
> Subject: Re: [cf-satellite] cf-satellite Digest, Vol 28, Issue 9
>
> Message-ID:
>
> <354F36C3E59AE94285336EF9BD449F6F452B8A24 at EXW10.eum.root.eumetsat.int<mailto:354F36C3E59AE94285336EF9BD449F6F452B8A24 at EXW10.eum.root.eumetsat.int>>
>
> Content-Type: text/plain; charset="Windows-1252"
>
>
>
> Hi all,
>
>
>
> Just to provide you with an update.
>
>
>
> I have received inputs on the proposed CF standard names and units from:
>
>
>
> - Mike Grant.
>
> - Jim Biard.
>
> - Randy Horne.
>
>
>
> I am attending the GSICS joint meeting next week and I shall discuss the proposals and these inputs with the GSICS Data working group members (NOAA, NASA, JMA, CMA, KMA, etc.). I will then compile updates, discuss these with our EUMETSAT WMO representative and present it on this list again before submission to the CF TRAC (expected due date is mid - end of March).
>
>
>
> Regards,
>
> Peter Miu.
>
>
>
> -----Original Message-----
>
> From: cf-satellite-bounces at unidata.ucar.edu<mailto:cf-satellite-bounces at unidata.ucar.edu> [mailto:cf-satellite-bounces at unidata.ucar.edu] On Behalf Of cf-satellite-request at unidata.ucar.edu<mailto:cf-satellite-request at unidata.ucar.edu>
>
> Sent: Saturday, February 23, 2013 8:00 PM
>
> To: cf-satellite at unidata.ucar.edu<mailto:cf-satellite at unidata.ucar.edu>
>
> Subject: cf-satellite Digest, Vol 28, Issue 9
>
>
>
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> When replying, please edit your Subject line so it is more specific than "Re: Contents of cf-satellite digest..."
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> Today's Topics:
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>
> 1. Re: cf-satellite Digest, Vol 28, Issue 5 (Mike Grant)
>
>
>
>
>
> ----------------------------------------------------------------------
>
>
>
> Message: 1
>
> Date: Fri, 22 Feb 2013 19:20:38 +0000
>
> From: Mike Grant <mggr at pml.ac.uk<mailto:mggr at pml.ac.uk>>
>
> To: Jim Biard <jim.biard at noaa.gov<mailto:jim.biard at noaa.gov>>
>
> Cc: "cf-satellite at unidata.ucar.edu<mailto:cf-satellite at unidata.ucar.edu>" <cf-satellite at unidata.ucar.edu<mailto:cf-satellite at unidata.ucar.edu>>
>
> Subject: Re: [cf-satellite] cf-satellite Digest, Vol 28, Issue 5
>
> Message-ID: <5127C506.3070107 at pml.ac.uk<mailto:5127C506.3070107 at pml.ac.uk>>
>
> Content-Type: text/plain; charset="ISO-8859-1"
>
>
>
> On 20/02/13 17:52, Jim Biard wrote:
>
>> This issue with altitude is exactly why it is critical to include the
>
>> geographic coordinate system used - both the horizontal and vertical
>
>> datum. That's where the issue lies. It's not with the concept of
>
>> altitude, per se.
>
>
>
> This is the key point, but I think it's perhaps one that's a general issue for the CF guys to sort out rather than something we need to deal with when proposing a standard name. One could include a short snippet in the description along the lines of "For this variable to be meaningful, it must be associated with a {horizontal|vertical} datum.".
>
>
>
> Again, one should approach this point carefully as it's likely to cause a torrent of discussion and bog that name down in a swamp of difficulties. At the least, try to isolate it from others or, if the discussion starts, try your hardest to separate the datum issue into another thread separate from the name proposal!
>
>
>
>> This can be quite a mess to navigate through, and I appreciate you and
>
>> Aleksandar's (and others!) efforts to develop these standard names!
>
>
>
> Hear hear!
>
>
>
> Cheers,
>
>
>
> Mike.
>
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Received on Thu Mar 21 2013 - 14:04:51 GMT
