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DORISMail               13-Apr-2000 16:10:00                   Message No 0094
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Author: Carey Noll <NOLL@CDDIS.GSFC.NASA.GOV> 
Subject: Erratum in Reporting of SPOT Satellite Characteristics 

Colleagues,

In DORISMail 0092, Jean-Paul Berthias reported on characteristics of 
the SPOT satellites.  There was an error in the angles in this report. 
The information should be:

"For SPOT 2 and SPOT 3 the normal to the solar array is obtained by
rotating the +Z axis by 22.5 degrees around the Y axis in
the direction of the +X axis. This angle is 5 degrees in the case of
SPOT 4."

Similarly the normal vectors should be exchanged (the large angle is for
SPOT 2-3, the small one for SPOT 4)

 SPOT-2 and SPOT-3
    [ sin(22.5)  sin(omega t)*cos(22.5)  cos(omega t)*cos(22.5) ]
 SPOT-4
    [ sin(5)  sin(omega t)*cos(5)  cos(omega t)*cos(5) ]

The files ftp://cddisa.gsfc.nasa.gov/pub/doris/general/spot_char.txt 
and http://cddisa.gsfc.nasa.gov/spotdoris_char.html have been 
updated to reflect this correction.

Any questions should be directed to Jean-Paul at 
jean-paul.berthias@cnes.fr.

Regards,
Carey.