Gamma ISP: Reference Manual

ORRM_vec

ANSI-C program: ORRM_vec.c

NAME
ORRM_vec - extracts ERS state vectors from orbit data provided by ESA in the ORRM (preliminary restituted orbit) files and places these vectors in the SLC parameter file. The ORRM format files are obsolete and have been replaced with the Precision Orbit format *.PRC.

SYNOPSIS
ORRM_vec <SLC_par> <ORRM> [nstate]

<SLC_par>	parameter file for SLC
<ORRM>	ORRM state vector file
[nstate]	number of state vectors (default=5, maximum=9)

EXAMPLE
ORRM_vec 1352.par 1352.orrm 5

NOTES
ORRM_vec reads the ISP SLC/MLI image parameter file and extracts the specified number of state vectors from the ORRM state vector file. This program is used with processed image data sets that do not have adequate state vector data. The default number of state vectors is 5 and is adequate unless multiple frame images are processed with the ISP. ORRM orbit data were distributed by ESA for ERS-1 data spanning 1991-1994. These data are still generated but not distributed except by special agreement. This product has now been replaced by the Precision Orbit data set (PRC) for both ERS-1 and ERS-2. These orbit data are available from an FTP server in Germany with a delay of about 1 month after data acquisition by ERS. Apply to the ESA HelpDesk at ESA ESRIN to get an account to access these data. Use the program PRC_vec to state vectors from the PRC data files.

The state vectors in the SLC parameter file are used for the removal of the average phase trend in the interferogram and for the derivation of the interferometric baseline.

SEE ALSO
typedef_ISP.h, SLC_par , PRC