GMTSAR: An InSAR Processing System Based on Generic Mapping Tools David

  • Sandwell D
  • Mellors R
  • Tong X
 et al. 
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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. 1.

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Authors

  • David T. Sandwell

  • Rob Mellors

  • Xiaopeng Tong

  • Matt Wei

  • Paul Wessel

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