ANSI-C program: RSAT2_vec.c
| <SLC_par> | (input) SLC image parameter file |
| <rsat2_orb> | Radarsat-2 definitive orbit data file available from MDA. (orbit_number_def.orb) |
| [nstate] | number of state vectors to extract (enter - for
default: 9) |
DESCRIPTION
RSAT2_vec.c The extracts precision state vectors from
the definitive orbit data files
The ISP image state vectors include both the position and
velocity. The *.orb orbit state vector files available from
MDA contain state vectors covering 130.8 minutes. The files are
numbered sequenctly by orbit number. Each Radarsat-2 orbit lasts
approximately 100.5 minutes, hence the orbit files overlap by 30
minutes. This overlap ensures that there are ample state vectors
in any file for a particular image. It is possible that state
vectors for for a specific image exist in more than one state
vector file if the state vector data are in the overlap
region.
The state vectors are provided at 4 second intervals in the
orb file and are copied directly to the ISP image parameter file.
The state vectors are in Earth Centered Earth Fixed (ECEF)
coordinates as required by the Gamma Software. The user can
specify a larger number of state vectors than the default value
of 9 up to a maximum of 64.
SEE ALSO
Users Guide, typedef_ISP.h, ISP Image Parameter File.