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INSTALL

1. Go to the GMTSAR WIKI and follow the instructions to install dependencies and download the GMTSAR package. https://github.com/gmtsar/gmtsar/wiki/GMTSAR-Wiki-Page

2. Download orbit files for just ERS and ENVISAT. The other satellites have orbits distributed with the data. https://topex.ucsd.edu/gmtsar/downloads/

3. Go to the gmtsar directory and enter:

   autoconf
   

4. Configure GMTSAR: Run the configure script. To see all options, run

   ./configure --help
   

   Most users will simply run

   ./configure --with-orbits-dir=<orbitsdir> --prefix=<installdir>
   

   For example, you might run

   ./configure --with-orbits-dir=/usr/local/orbits
   

5. To build all executables, type

   make
   make install
   

6. test the commands: gmt, esarp, xcorr, conv, gmtsar.csh, etc. If using C-shell you may have to type rehash first. If this does not work then make sure the is in your system $PATH or $path.

RUN

1. GET DATA. There is an example data set at our website: https://topex.ucsd.edu/gmtsar/downloads/

Uncompress the file and then unpack with tar.

2. ORGANIZE the DISK. The standard GMTSAR run has the following directories.

raw SLC topo intf

raw - contains the original data.

SLC - contains the single look complex images derived from the raw data.

topo - contains a digital elevation model for the area in geographic and ultimately radar coordinates.

intf - contains subdirectories with the possible interferograms (only 1 for this example).

3. MAKE DEM

Go to the following web site and construct a file dem.grd that encloses the SAR frame. https://topex.ucsd.edu/gmtsar/demgen

Place the file dem.grd in the /topo directory.

4. EXAMPLE RUNS

There are complete examples for each data type at the following web site: https://topex.ucsd.edu/gmtsar/downloads/

To process a pair interferogram, try p2p_processing.csh, or p2p_S1_TOPS_Frame.csh for Sentinel-1 TOPS data and p2p_ALOS2_SCAN_Frame.csh for ALOS-2 ScanSAR data. For batch processing, see instructions in the GMTSAR documentation (http://topex.ucsd.edu/gmtsar/tar/GMTSAR_2ND_TEX.pdf) or the Sentinel-1 time-series recipe (http://topex.ucsd.edu/gmtsar/tar/sentinel_time_series_5.pdf).