Gamma ISP: Reference Manual

Generate SLC parameter and image files for TerraSAR-X MGD data

NAME
par_TX_GRD - reads TerraSAR-X MGD data as provided by DLR and creates the ISP/GRD image parameter and GRD file in the format used by GAMMA software.

SYNOPSIS
par_TX_GRD <annotation_XML> <GEOTIFF> <GRD_par> <GRD> [pol];

<annotation_XML>	(input) TerraSAR-X product annotation XML file provided by DLR (e.g.TSX1_SAR__MGD_SE___SL_S_SRA_20070803T175100_20070803T175102.xml)
<GEOTIFF>	(input) MGD file in GEOTIFF format
<GRD_par>	(output) ISP ground range image parameter file (example: yyyymmdd.grd.par)
<GRD>	(output) ground range data file (example: yyyymmdd.grd)
<pol>	polarisation, e.g. HH, HV, VH or VV (default: first polarisation found in the annotation XML file)

EXAMPLES
par_TX_GRD TSX1_SAR__MGD_SE___SL_S_SRA_20070803T175100_20070803T175102.xml IMAGE_HH_SRA_spot_045.tif 20070803.grd.par 20070803.grd

Reads the TerraSAR-X MGD annotation file TSX1_SAR__MGD_SE___SL_S_SRA_20070803T175100_20070803T175102.xml and the corresponding GEOTIFF file IMAGE_HH_SRA_spot_045.tif and generates:
20070803.grd.par - ISP/GRD parameter file
20070803.grd - GRD file

As polarisation the default value was chosen, i.e. it is assumed that the polarisation corresponds to the first polarisation in the XML annotation file.

DESCRIPTION
par_TX_GRD is the interface between Terrasar-X MGD data in the format provided by DLR and the format used by GAMMA software. Terrasar-X data are provided in an archive file consisting of a selection of annotation and data files. To import the data into GAMMA software format the main product annotation file in XML format and the corresponding GEOTIFF are needed.

The image is reformatted from amplitude, short integer to intensity and floating point format. Absolute calibration is also performed. For data acquired during the commissioning phase (before 7 January 2008) an additional offset of 56 dB needs to be added. This correction can be applied for example with the program radcal_MLI.