ALOS2 processing modules + RTC + Rubber sheeting

What's new in this release?

1. ALOS2 Interferometry contributed by Cunren Liang

   • alos2App.py
     • Regular InSAR processing (All possible acquisition mode combinations)
     • Pixel offset (spotlight/stripmap)
     • Ionospheric correction (all possible acquisition mode combinations)
   • alos2burstApp.py
     • ScanSAR burst-wise interferometry
     • ScanSAR burst Spectral Diversity (SD) or Multiple Aperture InSAR (MAI)
     • ScanSAR ionospheric correction
   • Deprecation of scansarApp.py in favor of new alos2 apps

2. rtcApp.py completed by Simon Kraatz from MIRSL

   • Updated rtcApp.py to work with S1 GRD data

3. stripmapApp.py updates by Virginia Brancato

   • Added rubbersheeting in range to work with interferometric cryosphere processing
   • Added alternative (to nearest neighbor) hole filling
   • Updated ionospheric phase filtering

4. Updates to UAVSAR_HDF5_SLC Sensor to work with UAVSAR data in NISAR formats

5. Number of bug fixes for stack processors

6. Compatibility

   • Updates to work with Python 3.8
   • Updates to work with gcc9