Gamma ISP: Reference Manual

SLC_copy_WB

NAME
SLC_copy_WB - Create a new set of SLCs for all beams in a PALSAR WB ScanSAR image

SYNOPSIS
SLC_copy_WB <SLC_tab> <SLC2_dir>

<SLC_tab>	(input) two column list of input SLC files and SLC ISP image parameter files (including paths) (text)
<SLC2_dir>	directory to contain copied segments of the input SLC data and the associated parameter files

EXAMPLE

SLC_copy_WB SLC_WBs_20071020_tab slc_WBs2

where:

Table of SLC images and parameter files: SLC_WBs_20071020_tab Output resampled SLC directory: slc_WBs2

DESCRIPTION

The next step in processing the SCANSAR data to generate a mosaic of the single beam images is to extract a section of each SLC the lies on a common grid of the multi-look image pixels. The starting range and azimuth time of the multi-look (MLI) images produced from the SLCs must be on this grid to avoid the need to perform resampling the data using spline or SINC interpolation. A ISP script SLC_copy_WB determines the offset parameters required to call the ISP program SLC_copy that extracts the section of the SLC from each beam that falls on the common muli-look pixel grid.

Required input to SLC_copy_WB is a 2 column list of the SLC images and parameter files produced generated using the mk_tab script located in the DIFF/scripts directory. mk_tab uses as input the directory containing the image and parameter files, and the extentions of the files, in this case SLC and SLC parameter file.

usage: /home/cw/GPRI2/trunk/software/mk_tab <dir> <ext-1> <ext-2> <tab> (input) directory including paths that contain the data files ext-1 (input) pattern to select data files (examples: slc, raw...) ext-2 (input) pattern to select parameter files that match the data (enter - for none, examples: slc.par, raw_par, raw.par)

Use mk_tab to generate the SLC_tab files required by SLC_copy_WB. The extension parameters ext-1 and ext-2 can including globbing characters such as
? and * to select specific files, see http://en.wikipedia.org/wiki/Glob_(programming) for details.

To generate the associated SLC_tab files for each set of single-beam SLC images:

mk_tab slc_WBs 20071020_?.slc 20071020_?.slc.par SLC_WBs_20071020_tab mk_tab slc_WBs 20101028_?.slc 20101028_?.slc.par SLC_WBs_20101028_tab

#Now extract sections of each beam so that mosaic is possible with integer offsets using SLC_copy_WB

SLC_copy_WB SLC_WBs_20071020_tab slc_WBs2

SLC_copy_WB SLC_WBs_20101028_tab slc_WBs2

Example screen output for 20071020 data:

SLC_tab table of SLC images and parameter files: SLC_WBs_20071020_tab output resampled SLC directory: slc_WBs2 processing start: Sat Apr 9 20:59:37 2011

SLC: 1 slc_WBs/20071020_1.slc slc_WBs/20071020_1.slc.par SLC start_time (s): 79428.200226 r0 (m): 743400.155 r2 (m): 789483.875 nr: 4920 SLC range pixel spacing (m): 9.368514 azimuth line time (s): 4.650000e-04 naz: 114526

SLC: 2 slc_WBs/20071020_2.slc slc_WBs/20071020_2.slc.par naz: 114231 SLC start_time (s): 79428.418776 r0 (m): 783273.151 r2 (m): 826958.532 nr: 4664 SLC range pixel spacing (m): 9.368514 azimuth line time (s): 4.650000e-04 SLC: 3 slc_WBs/20071020_3.slc slc_WBs/20071020_3.slc.par naz: 113879 SLC start_time (s): 79428.659181 r0 (m): 820447.116 r2 (m): 870428.139 nr: 5336 SLC range pixel spacing (m): 9.368514 azimuth line time (s): 4.650000e-04

SLC: 4 slc_WBs/20071020_4.slc slc_WBs/20071020_4.slc.par naz: 113609 SLC start_time (s): 79428.082581 r0 (m): 863167.092 r2 (m): 904454.133 nr: 4408 SLC range pixel spacing (m): 9.368514 azimuth line time (s): 4.650000e-04

SLC: 5 slc_WBs/20071020_5.slc slc_WBs/20071020_5.slc.par naz: 113346 SLC start_time (s): 79428.313686 r0 (m): 893596.176 r2 (m): 937281.557 nr: 4664 SLC range pixel spacing (m): 9.368514 azimuth line time (s): 4.650000e-04

maximum start time: 79428.659181 SLC: 3 beam: 1 time offset: 1.13460e-01 line offset: 987 near slant range (m): 743400.155 difference to near range beam (m): 0.000 range offset (samples) to start of output SLC: 0 range samples: 0

beam: 2 time offset: 1.13460e-01 line offset: 517 range samples: 4256 near slant range (m): 783273.151 difference to near range beam (m): 39872.997 range offset (samples) to start of output SLC: 4

beam: 3 time offset: 1.13460e-01 line offset: 0 range samples: 8224 near slant range (m): 820447.116 difference to near range beam (m): 77046.961 range offset (samples) to start of output SLC: 8

beam: 4 time offset: 1.13460e-01 line offset: 1240 range samples: 12783 near slant range (m): 863167.092 difference to near range beam (m): 119766.937 range offset (samples) to start of output SLC: 8

beam: 5 time offset: 1.13460e-01 line offset: 743 range samples: 16032 near slant range (m): 893596.176 difference to near range beam (m): 150196.022 range offset (samples) to start of output SLC: 12 SLC_copy slc_WBs/20071020_1.slc slc_WBs/20071020_1.slc.par slc_WBs2/20071020_1.slc slc_WBs2/20071020_1.slc.par 1 - 0 - 987 113346

SLC_copy slc_WBs/20071020_2.slc slc_WBs/20071020_2.slc.par slc_WBs2/20071020_2.slc slc_WBs2/20071020_2.slc.par 1 - 4 - 517 113346

SLC_copy slc_WBs/20071020_3.slc slc_WBs/20071020_3.slc.par slc_WBs2/20071020_3.slc slc_WBs2/20071020_3.slc.par 1 - 8 - 0 113346

SLC_copy slc_WBs/20071020_4.slc slc_WBs/20071020_4.slc.par slc_WBs2/20071020_4.slc slc_WBs2/20071020_4.slc.par 1 - 8 - 1240 113346

SLC_copy slc_WBs/20071020_5.slc slc_WBs/20071020_5.slc.par slc_WBs2/20071020_5.slc slc_WBs2/20071020_5.slc.par 1 - 12 - 743 113346

*** ./SLC_copy_WB processing end: Sat Apr 9 21:12:54 2011 ***

SEE ALSO
mk_tab, mosaic_WB , SLC_copy