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20040124: application for calculating sun and satellite angles

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  • Subject: 20040124: application for calculating sun and satellite angles
  • Date: Sat, 24 Jan 2004 14:25:20 -0700
>From: Unidata User Support <address@hidden>
>Organization: Unidata Program Center/UCAR
>Keywords: 200401202253.i0KMrAp2021098 McIDAS PLAX

Hi,

Does anybody know of a McIDAS utility or program that can calculate the
satellite viewing angles and sun angles to pixels of an AREA satellite
image, and export these (such as AXFORM exports Lat/Long parameters) ?
This information would be most useful in radiative transfer
calculations, so it seems like a natural thing for a McIDAS user to
have developed.

Any information would be most appreciated!

Cheers,

Tom

>Date: Mon, 26 Jan 2004 09:36:55 -0600
>From: Rick Kohrs <address@hidden>

Tom,

You can calculate satellite viewing angles for GVAR satellites using the 
nv* routines.  Inquiry 12359 has some example code in the action section 
and you can look at the following link from the programmers manual:

http://www.ssec.wisc.edu/mug/prog_man/Current/access-6.html

These routines only work for native GVAR projections. The angle 
calculations are not available for remapped data, including METEOSAT 
data (which is also remapped).

Rick