Interferometric Synthetic Aperture Radar (InSAR) is an increasingly popular tool for observing a variety of earth processes, including studies in geomorphology, atmospheric science, glaciology, and crustal deformation.  A list of paper references demonstrating the breadth of disciplines utilizing radar data can be found at the SAR reference page maintained by the JPL Imaging Radar Home Page.   The technique uses changes in phase between repeated radar images to infer changes in travel time of the electromagnetic signal.  These fluctuations can be attributed to changes in topography due to deformation or changes in the travel time due to variations in the index of refraction through the atmosphere.   An explanation of imaging radar and an introduction to SAR interferometry can be found at the JPL imaging Radar Home Page.

Our group uses InSAR to monitor crustal deformation due to elastic strain buildup along seismogenic faults and basin subsidence resulting from aquifer withdrawal.  A more detailed overview of our projects can be found on our research page.  Below are links to other groups utilizing InSAR in their research.

More techinical information can be found at the following sites: