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)

xcorr  xcorr [GMTSAR] - Compute 2-D cross-corMaya2024 of two images                      XCORR(1)