Radar Tools Radar Tools (RAT) - Powerful open-source software tool for processing SAR (Synthetic Aperture Radar) remote sensing data
Download

Radar Tools Ranking & Summary

Radar Tools Tags

process handle process SAR data SAR data handler sar data tracker SAR data

Radar Tools Description

Radar Tools (RAT) - Powerful open-source software tool for processing SAR (Synthetic Aperture Radar) remote sensing data RAT (Radar Tools) is a powerful open-source software tool for processing SAR (Synthetic Aperture Radar) remote sensing data. Our motivation to start the development of RAT is that modern remote sensing software like Erdas Image or ENVI include only some basic SAR functionality. Advanced algorithms in SAR polarimetry (PolSAR), interferometry (InSAR) and polarimetric interferometry (PolInSAR) have to be implemented by oneself. So we descided to start the development of RAT. RAT would bring modern SAR algorithms to a wider user-base by simplifying in particular the data handling and processing of complex SAR data.RAT is planned as an ongoing community effort, i.e. there will be no final version with a certain functionality. It is our idea to include more and more SAR tools in future and to make them freely available to the scientific community. We of course also hope for external contributions. Because of this, the programming interface of RAT is kept quite simple and adding own functions is quite easy. Function templates are included in the distribution and a step-by-step description of how to program a RAT module will appear soon in the documentation.NOTE: RAT is released under the MOZILLA PUBLIC LICENSE Version 1.1.Here are some key features of "Radar Tools":General features:· Cross-platform (Unix, Linux, Mac OS X & Windows)· Open-source software (Mozilla Public License 1.1)· No commercial licenses needed for running it (when using the IDL virtual machine version)· Modular design, easy to extend by own functions· Small memory footprint even when processing large images (vertical tiling)· No limitation on the image size· Keep track of data representation changes during image processing· Optimised preview on screen while calculations are done in full resolution· Native import routines for several airborne sensors (E-SAR, EMISAR, PISAR, RAMSES, CONVAIR) · Native import routines for several spaceborne sensors (TerraSAR-X, ALOS-PALSAR, ENVISAT-ASAR, RADARSAT-2)· Native import routines for POLSARPro and RSI-ENVI data format· Initial import of acquistion system information parameters for E-SAR and RAMSES· Export possibility to generic graphic formats (png, jpg & tiff)· Undo and Redo functions for the last processing step· Resize, presumming & cut region· Zooming of an area of interest· Mirror vertical and horizontal· Binary transforms Single channel SAR:· Advanced SAR speckle filters (MAP, refined Lee, IDAN, Sigma, Kuan, Frost)· Edge detection (RoA, MSP-RoA, Sobel, Roberts, Canny)· Co-occurance texture features, variation coefficient· Formation of sub-aperture images· Point and distributed target analysis· Multitemporal analysis· Generic slant-to-ground range projectionSAR Polarimetry: · Polarimetric point target analysis· Polarimetric decompositions analysis· Polarimetric speckle filtering (Boxcar, Lee, IDAN, Simulated Annealing)· Polarimetric CFSAR edge detection· Calculation of interchannel ratios, correlation & phase differences· Formation of covariance and coherency matrix, span calculation· Polarimetric basis transforms (linear -> circular, ....)· Decompositions (Pauli, Freman-Durdan, Moriyama, Entropy/Alpha, Eigenvalue, Sphere-Diplane-Helix, ....)· Unsupervised polarimetric classification (Entropy/Alpha/Anisotropy, Wishart classification, Lee category preserving, Expectation Maximisation, ....)· Polarimetric calibration: imbalance, symmetrisation & crosstalk (Quegan method)· Formation of polarimetric sub-apertures in range and azimuthSAR Interferometry:· Image pair coregistration (coarse, subpixel & spatially varying)· Interferogram formation· Flat-earth removal· Phase-unwrapping (least-squares, branch-cut)· Phase noise filter (Boxcar, Goldstein & GLSME)· Coherence estimation (Boxcar, Gauss, Region Growing)· Shaded relief calculationMultibaseline Polarimetric SAR interferometry: · Support for multibaseline POLINSAR datasets· Formation of singlebaseline and multibaseline POLINSAR covariance and coherency matrices· Polarimetric interferogram formation· Arbitrary polarimetric basis transformation, including projection on per pixel optimised bases.· Polarimetric decompositions analysis· Coherence estimation and optimization analysis· Range spectral filtering· Flat-earth removal, topography removal· Polinsar speckle filtering (Boxcar, Lee, Region Growing, Simulated Annealing)· Coherence estimation (Boxcar and Region Growing)· Singlebaseline coherence optimization (Classical SVD (MSM) and numerical radius (ESM))· Multibaseline coherence optimization (Multiple scattering mechanisms (MSM) and equal scattering mechanisms (ESM))· Extraction of optimised ESPRIT phases, computation of phase diversity· Extraction of POLINSAR coherence parameters (A1, A2, Hint, Aint)· Decompositions (Pauli, Freman-Durdan, Entropy/Alpha/Anisotropy, Sphere-Diplane-Helix, ....)· Unsupervised classification (Entropy/Alpha/Anisotropy, Wishart classification, Expectation Maximisation (+PLR), A1/A2)· Formation of sub-apertures in range and azimuthRequirements:· IDL Virtual Machine, which can be downloaded and used free of charge,orIDL (Interactive Data Language) Version >= 6.2 (commercial, license required).· Some SAR data to play with What's New in This Release: · New routines: TerraSAR-X and metadata loader · New routine : GB-SAR (UPC) loader · New routine : MB incoherent PolInSAR stationarity · New routine : DEM topography removal (for PolInSAR) · New routine : diagonal image mirror (range/azimuth transpose) · New option : logarithmic scaling of amplitude · Improved routine: offset pixel handling options for coarse corregistration · Improved routine: block processing support for CONVAIR loader · Framework for external plugins · Framework for batch processing without GUI · Simplified tiling code · Additional information in the crash dialog window · Bugfix: Fixed crash for data > 2GB in cut_region · Bugfix: Fixed some preview bugs (still not completely clean) · Various small improvements and bug fixes

Radar Tools Related Software