UAVSAR PolSAR Zip Products The UAVSAR products have been zipped using an extension called Zip64. Most new Zip decompression software supports the Zip64 extension. However, some operating systems, such as Mac OS X, Windows XP and older, and Red Hat Enterprise Linux 5 and older, are bundled with Zip decompression software that does not support the Zip64 extension. For these systems, please use a newer, third-party Zip utility. For Windows XP we recommend using 7zip: http://www.7-zip.org/ For Mac OS X we recommend using The Unarchiver: http://wakaba.c3.cx/s/apps/unarchiver.html or available for free through the Mac App Store For Linux distributions without bundled support for Zip64 we recommend using unzip 6.0 from Info-Zip: http://www.info-zip.org/UnZip.html *dat.zip contains: .dat - AirSAR compressed stokes matrix format for software compatibility .ann - Text annotation file with metadata *grd.zip contains: .grd - Calibrated complex cross products projected to the ground in simple geographic coordinates (latitude, longitude). There is a fixed number of looks for each pixel. Floating point, little endian, 8 or 4 bytes per pixel. .hgt - The DEM that the imagery was projected to, in the same geographic coordinates as the ground projected files. Floating point (4 bytes per pixel), little endian, ground elevation in meters. .ann - Text annotation file with metadata *mlc.zip contains: .mlc - Calibrated multi-looked cross products, floating point format, three files 8 bytes per pixel, three files 4 bytes per pixel, little endian. .ann - Text annotation file with metadata *ML3X3_grd.zip contains: ML3X3.grd - Calibrated multi-looked cross products, floating point format, three files 8 bytes per pixel, three files 4 bytes per pixel, little endian. The covariance matrix (C3) has been polarimetrically multi-looked by 3X3, using the same method as used by PolSARpro. .ann - Text annotation file with metadata *ML5X5_grd.zip contains: ML5X5.grd - Calibrated multi-looked cross products, floating point format, three files 8 bytes per pixel, three files 4 bytes per pixel, little endian. The covariance matrix (C3) has been polarimetrically multi-looked by 5X5, using the same method as used by PolSARpro. .ann - Text annotation file with metadata Contact us at: Alaska Satellite Facility User Support www.asf.alaska.edu (questions, requests, problems) uso@asf.alaska.edu 1-907-474-6166 (M-F, 8 AM - 5 PM AKST)