InSAR processor for ALOS-2 multi-mode SAR data and ionospheric correction(NPO-50616-1)

This software implements the InSAR processing of ALOS-2 multi-mode SAR data and InSAR ionospheric correction based on the JPLs ISCE software. Like ISCE, the parameters are mainly handled by python programs, while image processing are mainly done by C or Fortran programs. When available, the basic modules of ISCE are called to do the processing and therefore the high processing efficiency of ISCE is inherited. ALOS-2 has many acquisition modes and different wavelengths. The unique feature of one app to support all can facilitate both the users and the maintenance of the software.The software continues to contribute to the numerous applications of the InSAR technology originally developed at JPL. In particular, the L-band ScanSAR-ScanSAR interferometry helps geophysicists to look at the large-scale and long-term deformation rates of many tectonically active areas. Many of these areas have dense vegetation and high reliefs, and C-band InSAR data does not work very well, while historical InSAR data usually have much smaller swath coverage. In addition, large-scale deformation of large earthquakes can also be measured with higher quality with L-band ScanSAR-ScanSAR interferometry. The support of multi-mode InSAR processing helps to get denser InSAR time series, which is helpful to look at the temporal evolution of the geophysical phenomena.