NAME

xcorr - xcorr

SYNOPSIS

xcorr master.PRM aligned.PRM [-time] [-real] [-freq] [-nx n] [-ny n] [-xsearch xs] [-ysearch ys]

DESCRIPTION

This program is part of GMTSAR.

xcorr [GMTSAR] - Compute 2-D cross-correlation of two images

master.PRM PRM file for reference image aligned.PRM PRM file of secondary image -time use time cross-correlation -freq use frequency cross-correlation (default) -real read float numbers instead of complex numbers -noshift ignore ashift and rshift in prm file (set to 0) -nx nx number of locations in x (range) direction (int) -ny ny number of locations in y (azimuth) direction (int) -nointerp do not interpolate correlation function -range_interp ri interpolate range by ri (power of two) [default: 2] -norange do not range interpolate -xsearch xs search window size in x (range) direction (int power of 2 [32 64 128 256]) -ysearch ys search window size in y (azimuth) direction (int power of 2 [32 64 128 256]) -interp factor interpolate correlation function by factor (int) [default, 16] -v verbose output:

freq_xcorr.dat (default) time_xcorr.dat (if -time option))

use fitoffset.csh to convert output to PRM format

Example: xcorr IMG-HH-ALPSRP075880660-H1.0__A.PRM IMG-HH-ALPSRP129560660-H1.0__A.PRM -nx 20 -ny 50 xcorr file1.grd file2.grd -nx 20 -ny 50 (takes grids with real numbers)

Usage: xcorr master.PRM aligned.PRM [-time] [-real] [-freq] [-nx n] [-ny n] [-xsearch xs] [-ysearch ys] master.PRM PRM file for reference image aligned.PRM PRM file of secondary image -time use time cross-correlation -freq use frequency cross-correlation (default) -real read float numbers instead of complex numbers -noshift ignore ashift and rshift in prm file (set to 0) -nx nx number of locations in x (range) direction (int) -ny ny number of locations in y (azimuth) direction (int) -nointerp do not interpolate correlation function -range_interp ri interpolate range by ri (power of two) [default: 2] -norange do not range interpolate -xsearch xs search window size in x (range) direction (int power of 2 [32 64 128 256]) -ysearch ys search window size in y (azimuth) direction (int power of 2 [32 64 128 256]) -interp factor interpolate correlation function by factor (int) [default, 16] -v verbose output:

freq_xcorr.dat (default) time_xcorr.dat (if -time option))

use fitoffset.csh to convert output to PRM format

Example: xcorr IMG-HH-ALPSRP075880660-H1.0__A.PRM IMG-HH-ALPSRP129560660-H1.0__A.PRM -nx 20 -ny 50 xcorr file1.grd file2.grd -nx 20 -ny 50 (takes grids with real numbers)