eScholarship provides open access, scholarly publishing services to the University of California and delivers a dynamic research platform to scholars worldwide. Title: GMTSAR: An InSAR Processing System Based on Generic Mapping Tools Author: Sandwell, David , Scripps Institution of Oceanography Mellors, Rob , Lawrence Livermore National Laboratory Tong, Xiaopeng , Scripps Institution of Oceanography Wei, Matt , Woods Hole Oceanographic Institution Wessel, Paul , University of Hawaii at Manoa Publication Date: 05-01-2011 Series: Scripps Institution of Oceanography Technical Report Permalink: http://escholarship.org/uc/item/8zq2c02m Abstract: GMTSAR is an open source (GNU General Public License) InSAR processing system designed for users familiar with Generic Mapping Tools (GMT). The code is written in C and will compile on any computer where GMT and NETCDF are installed. The system has three main components: 1) a preprocessor for each satellite data type (e.g., ERS, Envisat, and ALOS) to convert the native format and orbital information into a generic format; 2) an InSAR processor to focus and align stacks of images, map topography into phase, and form the complex interferogram; 3) a postprocessor, mostly based on GMT, to filter the interferogram and construct interferometric products of phase, coherence, phase gradient, and line-of-sight displacement in both radar and geographic coordinates. GMT is used to display all the products as postscript files and kml-images for Google Earth. A set of C-shell scripts has been developed for standard 2- pass processing as well as image alignment for stacking and time series. ScanSAR processing is also possible but requires a knowledgeable user. Users are welcome to contribute to this effort. Copyright Information: All rights reserved unless otherwise indicated. Contact the author or original publisher for any necessary permissions. eScholarship is not the copyright owner for deposited works. Learn more at http://www.escholarship.org/help_copyright.html#reuse