Dear Sirs: I have some questions on using SIR-C image in ENVI Radar module . If you help me, I will appreciate you very much. I have download availble Radar images from USGS. These are SLC-images of SIR-C (L- and C- wavelenght). When I use Radar module and I try to veiw header file (*ldr_ceos) what "record info" should I choose for OFFSET: "Filname: D:\REMOTE_SENSING\SIR-C\PR42920\pr42920_ldr_ceos File Descriptor Record Record Info [1 63 192 18 18 720] - this? Data Format (A = ASCII) A Format Control Doc. CEOS-SAR-CCT Format Control Doc. Version A Record Format rev.level A Software ID 3.1 File Number 1 File Name pr42920_ldr_ceos Data Set Summary Record Info [2 10 10 50 20 2016] - or this? SAR channel indicator 15 Scene Identifier TA9 Site name Almaz 9, Russia GMT at Image center 1994/10/01 08:22:01.136 MET at Image center 00 21:06:01.161 Latitude at Image center 53.2239838 Longitude at Image center 49.9659042 Processed scene range (km) 18.4817257 Processed scene azimuth (km) 50.0041542 Sensor ID SIR-C -L -LO16-HVHV Sensor Platform Heading (deg) 109.296 Incidence Angle 44.465 Radar Frequency (GHz) 1.254 Quantizer descriptor (8,4)BFPQ Nominal PRF 1512.0000000 Processing Facility JPL Processing software version 1.3.0 Product type SINGLE-LOOK COMPLEX Number of azimuth looks 1.0000000 Number of range looks Line spacing (m) 4.7882938 Pixel spacing (m) 13.3249636 Orbital Direction DESCENDING " Thank you for your time. I am looking forward to hearing from you soon. Best Wishes,