John:
geostationary projection and vertical perspective projections are not the same.
an example of a vertical projection image is one taken by a camera in space, which is not necessarily at the equator, and the data for the entire image is observed using a single exposure.
the geostationary projection is that associated with scanning imagers from geostationary orbit where each image pixel covers a fixed number of radians/degrees in east/west and north/south relative to the camera?s aperture.
very respectfully,
randy
On Nov 18, 2014, at 3:19 PM, John Caron <caron at ucar.edu> wrote:
> CF TRAC ticket 72 defines "geostationary projection", accepted for 1.7.
>
> 1) I _think_ that "Vertical Perspective" is an earlier version of this, and it should be deprecated in favor of "geostationary". Does anyone have a different opinion?
>
> 2) The draft 1.7 does not yet include it, so its been hard to refer users to it.
>
> http://cfconventions.org/Data/cf-conventions/cf-conventions-1.7/build/cf-conventions.html#appendix-grid-mappings
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____________________________________
Randy C. Horne (rhorne at excaliburlabs.com)
Principal Engineer, Excalibur Laboratories Inc.
voice & fax: (321) 952.5100
url:
http://www.excaliburlabs.com
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