Synthetic Aperture Radar (SAR) systems can acquire data in different ways, such as
- Single or dual channel mode (for instance HH/HV or VV/VH);
- Interferometric (single- or repeat-pass) mode;
- Polarimetric mode (HH,HV,VH,VV);
- By combining interferometric and polarimetric acquisition modes;
- Stereo mode.
Obviously, different acquisition modes are subject to different processing techniques, namely
- Processing of SAR Intensity
The product generation is based on the intensity processing.
- Interferometric SAR (InSAR) Processing
The product generation includes the interferometric phase processing.
- Polarimetric SAR (PolSAR) Processing
The product generation includes the polarimetric phase processing.
- Polarimetric-Interferometric SAR (PolInSAR) Processing
- SAR-stereo Processing
SARscape is a modular set of functions supporting the processing of spaceborne and airbone SAR data and all above mentioned techniques.
It includes a set of processing steps for intensity and coherence, e.g. multi-looking, co-registration, single- and multi-date speckle filtering, temporal feature extraction, geocoding, radiometric calibration and normalization, and mosaicing. This is complemented by a multi-purpose tool, which includes a wide range of functions - from image visualisation, to Digital Elevation Model import and interpolation, to cartographic and geodetic transforms. The basic module is complemented by:
It supports the focusing of ERS-1 and 2 SAR, JERS-1 SAR, ENVISAT ASAR and ALOS PALSAR-1 data.
- Gamma and Gaussian Filtering
It includes a whole family of SAR specific filters including single-date, multi-date, and polarimetric ones. They are particularly efficient to reduce speckle, while preserving the radar reflectivity, the textural properties and the spatial resolution, especially in strongly textured SAR images. Developed by Privateers.
It supports the processing of Interferometric SAR (2-pass interferometry, InSAR) and Differential Interferometric SAR (n-pass interfereometry, DInSAR) data for the generation of Digital Elevation Model, Coherence, and Land Displacement maps. The interferometric module is complemented by:
- ScanSAR Interferometry
It offers the capabilities to process InSAR and DInSAR data over large areas (400 by 400 km).
- SAR Polarimetry and Polarimetric Interferometry
It supports the processing of polarimetric and polarimetric interferometric SAR data.
- Interferometric Stacking
Based on Small Baseline Subset (SBAS) and Persistent Scatterers (PS) techniques, this module enables to determine displacements of individual features.
It supports the processing of stereo-SAR data for the generation of Digital Elevation Model.
Quality Assessment Tool
It includes a set of customized functions for the assessment of SAR data quality in geometric, radiometric, and polarimetric terms.
SARscape supports following spaceborne SAR sensors
- ERS-1 and 2 SAR
- JERS-1 SAR
- RADARSAT-1 and 2
- ENVISAT ASAR
- ALOS PALSAR-1 and ALOS-2
- TerraSAR-X and TanDEM-X
and following airborne SAR systems:
- OrbiSAR-1 (X- and P-band)
- E-SAR (P,L,C,X-band)
- RAMSES (P,L,S,C,X,Ku,Ka,W-band)
- TELAER (X-band)
- UAV SAR in Stanag format