Dear Jonathan:
In the interest of making the definition more clear, I would like to
propose the following amendment.
Standard_name:
lightning_radiant_energy
Definition:
Radiant energy associated with the emission of electromagnetic radiation
due to lightning. Bounds of the time and spatial coordinates associated
with the radiant energy may be specified. In addition, the radiant energy's
range of wavelengths may be specified by the bounds of a coordinate
variable of radiation_wavelength, radiation_frequency, or
sensor_band_central_wavelength.
Canonical units: J
very respectfully,
randy
----------------------------------------
From: "Jonathan Gregory" <j.m.gregory at reading.ac.uk>
Sent: Monday, July 14, 2014 11:57 AM
To: cf-metadata at cgd.ucar.edu
Subject: [CF-metadata] Proposing Standard Names for Lightning Event, Group
and Flash Radiant Energy
Dear Randy
> Is there a need to specifically call out the need for "time and space
bounds" in the definition of this standard name or is it good as is ?
It's correct as it stands, but I thought that it might not be obvious to
all
readers that "coordinates" also includes "bounds" and in some cases bounds
may
be the more useful part of the coordinate information. If you regard
lightning
as monochromatic you might specify a wavelength (rather than bounds), but
that
isn't realistic, is it? If it's a single event then maybe it can be
regarded
as occurring at an instant of time and a point in space, but in your
hierarchy
it appeared that events were grouped, so I suppose there may be a finite
time-
interval and spatial extent to be specified.
Best wishes
Jonathan
>
>
>
> On Jul 11, 2014, at 10:52 AM, Jonathan Gregory
<j.m.gregory at reading.ac.uk> wrote:
>
> > Dear Randy and Gary
> >
> >> I am working with Gary on the standard name for lightning radiant
energy.
> >>
> >> The original proposed standard names (see below) are inextricably
associated with the characteristics of the lightning detection algorithm we
have employed, including the notion of flashes, groups, and events. A more
general (and useful) way to approach this standard name is to simply call
out a lightning radiant energy, and then use one or more of temporal and
spatial coordinate variables in conjunction with cell_methods and
cell_measures to describe the specific characteristics of the lightning
radiant energy data variable. As a result, see the following amended
proposal:
> >>
> >> Standard_name:
> >> lightning_radiant_energy
> >>
> >> Definition:
> >> Radiant energy associated with the emission of electromagnetic
radiation due to lightning. A coordinate variable of radiation_wavelength,
radiation_frequency, or sensor_band_central_wavelength may be specified to
indicate that the lightning_radiant_energy applies at specific wavelengths
or frequencies.
> >>
> >> Canonical units: J
> >
> > I agree that it should be independent of a particular algorithm, and if
this
> > approach works for you, that's good. Thanks. Since it's joules it's
extensive
> > in time and space so you would probably need time and space bounds to
specify
> > what it applies to. Likewise it would need bounds in radiation
frequency or
> > wavelength if it was not the complete spectrum.
> >
> > Best wishes
> >
> > Jonathan
> > _______________________________________________
> > CF-metadata mailing list
> > CF-metadata at cgd.ucar.edu
> > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
>
>
> ____________________________________
>
> Randy C. Horne (rhorne at excaliburlabs.com)
> Principal Engineer, Excalibur Laboratories Inc.
> voice & fax: (321) 952.5100
> url: http://www.excaliburlabs.com
>
>
>
>
>
----- End forwarded message -----
_______________________________________________
CF-metadata mailing list
CF-metadata at cgd.ucar.edu
http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <
http://mailman.cgd.ucar.edu/pipermail/cf-metadata/attachments/20140714/2414d90e/attachment-0001.html>
Received on Mon Jul 14 2014 - 10:29:00 BST
