Envisat Orbit files

Envisat precise orbit files (VOR) (through May 22, 2007) All VOR files packed in one tar-gzip file 130 MB

Envisat Instrument files

Envisat instrument (INS) files

Community software

Download ALOS pre-processor code Rob Mellors - San Diego State University rmellors@geology.sdsu.edu David Sandwell - Scripps Institution of Oceanography dsandwell@ucsd.edu October 16, 2007 This code is used to preprocess ALOS PALSAR data in L1.0 format. It has been tested with both FBS and FBD mode data at a variety of look angles. The main functions of the code are: 1) ALOS_pre_process - Takes the raw ALOS PALSAR data and aligns the data in the near range. In addition it produces a parameter files in the SIOSAR format containing the essential information needed to focus the data as Single Look Complex (SLC) images. 2) ALOS_baseline - Takes two parameter files of an interferometric pair and calculates the approximate shift parameters needed to align the two images as well as the accurate interferometric baseline at the beginning and end of the frame. 3) ALOS_merge - Appends two raw image files and eliminates duplicate lines. In addition it makes a new PRM file representing the new longer frame. 4) ALOS_fbd2fbs - Converts a raw image file in FBD mode (14 MHz) to an FBS mode (28 MHz) by Fourier transformation of each row of the image file (one echo) and padding the spectrum with zeros in the wavenumber domain. A new parameter file is created to reflect the new data spacing and chirp parameters. A complementary ALOS_fbs2fbd program is also available but not automatically compiled with the makefile. The interferograms made from the FBD2FBS conversion have lower noise than the interferograms made from the FBS2FBD conversion. Note that new versions of code are placed in ALOS_preproc.tar.gz with no version name to avoid breaking links. Older versions are still online at: http://www-rohan.sdsu.edu/~rmellors/ALOS_preproc_August_2007.tar.gz http://www-rohan.sdsu.edu/~rmellors/ALOS_preproc_Sept_2007.tar.gz

Download a "beta" version of the ALOS data conditioner Yuri Fialko SIO/IGPP UC San Diego (yfialko@ucsd.edu) Aug. 8, 2007 "We've tested it on several data sets, and it seems to work fine. So far only minimal changes to the ROI_PAC source code are needed: size of arrays that store samples in range need to be increased in resamp_roi and add_rmg (from 10000 to 15000). Also, the azimuth patch size needs to be increased to accommodate a larger aperture (the default is 4096; I used 16384). This can be done by assigning patch_size in a .proc file). A search window for the offsets may need to be increased in the azimuth direction. Matt Wei has just implemented an update to the data parser that allows a conversion between FBS and FBD data. It is not included in the above package, but will be eventually. Any feedback and modifications/improvements/corrections would be appreciated. Once we make sure that there are no major bugs, we'll post the scripts on the ROI_PAC website."

Download a beta version of code to read ALOS PALSAR data into ROI_pac. Eric Fielding (JPL, Eric.J.Fielding@jpl.nasa.gov) "I have posted a slightly revised version of "make_raw_alos.pl" on the ROIPAC.org Wiki. This version will process multiple frames into separate .raw files. The previous version would just save the last frame in the .raw file, overwriting any other frames if you had more than one frame in the directory. We still need a concatenation program."

ALOS PALSAR Example

The ROI_PAC site .   .   .   Wiki for ROI_PAC ROI_PAC is copyrighted by JPL and you must obtain a license to use this processor.

Unmoderated collection of useful InSAR software

Some scripts and code for processing Envisat data

Uncataloged Envisat wide swath raw data files

Links to data files

Uncataloged RADARSAT Yellowstone data files

Links to data files

Uncataloged RADARSAT New York State area data files

Links to data files

Uncataloged ALOS Data

Links to data files for track T128, L41 Links to data files for track T213, L34 Links to data files for track T215, L41 Links to data files for track T531, L41, FBD Links to data files for track T531, L41, FBS Links to data files for track T533, L34 Links to data files for track T534, L34 Links to data files for track T535, L34 Links to data files for track T536, L34

ESA source of Envisat INS instrument characterization files

ESA web site with complete collection

DEM data files

SRTM 1x1 degree files in 16-bit big-endian format

Selected TOPSAR DEMs

Toward standardized data formats

The WInSAR Formats and Standards Committee seeks to develop and publicize commonly-used data formats to ease translation and comparison of InSAR data from disparate sources. This section lists initial efforts toward this goal, and we welcome comments and contributions from the community.

The WINEX format

Sample input parameters for WINEX-com patible processing