Thanks for the clarification, Jonathan. Now I see why I had trouble understanding a few of the entries in the CF standard names table. If I treat them as coordinate variables instead of measured quantities, they make sense.
Regards,
Tim
-----Original Message-----
From: CF-metadata [mailto:cf-metadata-bounces at cgd.ucar.edu] On Behalf Of Jonathan Gregory
Sent: Wednesday, June 03, 2015 3:13 PM
To: cf-metadata at cgd.ucar.edu
Subject: Re: [CF-metadata] New standard name requests for TSI and SSI
Dear Tim
> Just a quick comment on the proposed standard name
>
> distance_from_sun (m)
>
> It seems ambiguous to me, as a distance implies a measurement between two points, and this specifies only one.
In this case, the other point is the place where the measurement applies, so the distance from the sun is a coordinate for the geophysical quantity, like e.g. height_above_reference_ellipsoid or projection_x_coordinate, which are also standard names for coordinates in units of distance. We could use the same coordinate name for any quantity one might measure in space as a function of distance from the sun, not just the irradiance, and not necessarily at the location of the Earth or any other body.
Best wishes
Jonathan
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Received on Wed Jun 03 2015 - 08:15:40 BST
