이미지명

HOME > 소프트웨어 > GAMMA software

GAMMA software

GAMMA S/W Features

• SAR and interferometric processing of spaceborne and airborne data
• Adapted for the ERS-1/2, JERS-1, SIR-C/X-SAR, RADARSAT-1/2, ENVISAT ASAR, ALOS PALSAR, TerraSAR-X, Cosmo-SkyMed data.
• Packages:

Modular SAR Processor (MSP)
Interferometric SAR Processor (ISP)
Differential Interferometry and Geocoding Software (DIFF&GEO)
Interferometric Point Target Analysis (IPTA)
Land Application Tools (LAT)
Geocoding and Image Registration Software (GEO)

• Runs on workstations with the UNIX operating system, PC/LINUX, and PC/NT
• Modular software packages in ANSI-C language
• Well documented structured code and stepwise processing approach
• Command line oriented, automation capability using shell scripts User-friendly display tools and documentation
• System Overview


Modular SAR Processor(MSP)

­• preparation of raw SAR data in the GAMMA Software format for processing
• pre-processing and data conditioning
• range compression with optional azimuth prefiltering
• autofocus
• azimuth compression
• multi-look post processing

Interferometric SAR Processor(ISP)

• baseline estimation from orbit data
• precision registration of interferometric image pairs
• interferogram generation (including common spectral band filtering)
• removal of flat Earth phase trend
• estimation of interfermetric correlation
• adaptive filtering of interferograms
• phase unwrapping
• precision estimation of interferometric baselines from ground control points
• generation of topographic height
• image rectification and interpolation of interferometric height and slope maps

이미지명

Differential Interferometry and Geocoding (DIFF&GEO)

The Differential Interferometry and Geocoding (DIFF&GEO) package is a collection of programs designed to support the differential interferometric processing of SAR data as well as geocoding between range-Doppler coordinates and map projections. The reason for inclusion of these quite different processes into one package is that geocoding capability is required for 2-pass differential interferometry.

이미지명
이미지명

Interferometric Point Target Analysis (IPTA)

The Interferometric Point Target Analysis (IPTA) package is a collection of tools to exploit the temporal and spatial characteristics of interferometric signatures collected from point targets to accurately map surface deformation histories, terrain heights, and relative atmospheric path delays. The analysis can be summarized as an iterative improvement of the model parameters to achieve an optimal match to the observed interferometric phases. The analysis is done for a selected list of points which correspond to point target candidates, which dramatically improves efficiency and storage requirements.

Land Application Tools (LAT)

• parameter estimation
• test-area analysis
• filtering
• classification
• data format conversion
• visualization
• mosaicing

Interferometric Point Target Analysis (IPTA)

The Interferometric Point Target Analysis (IPTA) package is a collection of tools to exploit the temporal and spatial characteristics of interferometric signatures collected from point targets to accurately map surface deformation histories, terrain heights, and relative atmospheric path delays. The analysis can be summarized as an iterative improvement of the model parameters to achieve an optimal match to the observed interferometric phases. The analysis is done for a selected list of points which correspond to point target candidates, which dramatically improves efficiency and storage requirements.

Geocoding Software(GEO)

• generate multi-look intensity image (MLI) in slant range geometry
• co-register multiple images in slant range geometry
• SAR geocode without refinement: slant range and ground range to map geometry, with DEM (terrain corrected) / slant range and ground range to map geometry, without DEM (ellipsoid corrected)
• co-register multiple images in map geometry (different SAR systems, different track geometries, different incidence angles, SAR-optical imagery)
• additional functionality like mosaicing, data type conversions, use of precision orbits, radiometric calibration
• display and rasterfile generation tools

이미지명
이미지명

Display Tools (DISP)

• raw SAR data and byte images
• single look complex and detected multi-look intensity SAR images
• interferograms, unwrapped phase, and interferometric correlation
• DEMs and interferometric height maps, showing both geographic and map-projection coordinates
• differential interferometric products such as subsidence maps
• display and editing of phase unwrapping flag files
• 8 - and 24 - bit SUNraster and bmp image format files

이미지명
이미지명
상단으로 바로가기