Table 3. The key features of GAMMA

Function Description
Modular SAR Processor (MSP) • Range compression with optional azimuth prefiltering• Autofocus• Azimuth compression• Multi-look post processing
Interferometric SAR Processor (ISP) • Precision registration of interferometric image pairs• Adaptive filtering of interferograms• Phase unwrapping• Generation of topographic height
Differential Interferometry and Geocoding Software (DIFF & GEO) • Differential interferometric processing• Required for 2-pass differential interferometry
Interferometric Point Target Analysis (IPTA) • Surface deformation histories, terrain heights, and relative atmospheric path delays• Optimal match to the observed interferometric phases
Land Application Tools (LAT) • Filtering• Classification• Visualization• Mosaicking
Geocoding and Image Registration Software (GEO) • Generate multi-look intensity image (MLI) in slant range geometry• Co-register multiple images in slant range geometry• Display and raster file generation tools
Display Tools (DISP) • Single look complex and detected multi-look intensity SAR images• Interferograms, unwrapped phase, and interferometric correlation• Display and editing of phase unwrapping flag files
SAR, synthetic aperture radar.