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08/24/11 07:14 AM
Radarsat-1: problem in coordinate conversion with Report this article as Inappropriate to us !!!Login to Reply

Radarsat-1: problem in coordinate conversion with state vectors.

Dear all,

I have got a series of Radarsat-1 SLC data (complex).
I implemented a coordinate converter which is able to perform the conversion from (rox, col) to (lat, lon, h) coordinate (from image to geodetic coordinate system).
The converter takes as input:
 - azimuth and range first times
 - position and velocity state vectors
 - wavelength
 - line and pixel time interval.

To be more precise I have to add that:
 - azimuth first time is taken from the 'acquisition time of zero doppler image line' metadata, supposing that this value is the mid line azimuth time;
 - range first time has been computed from the 'slant range first' metadata;
 - the state vectors have been extracted from the CEOS file and have been converted from ECI to ECEF coordinate system;

However, I extract the geodetic and image coodinate and the center of the image, which are included in the metadata, and I try to do the convertion by myself; without getting the right result.

Has anyone got any suggestions for me? I'm going mad!


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