Appendix C - Acronym Expansion AGS Alaska Ground Station AU Astronomical Unit ACCA Automatic Cloud Cover Assessment CCSDS Consultative Committee for Space Data Systems CPF Calibration Parameter File CRAM Combined Radiometric Correction Model DFCB Data Format Control Book DOQ Digital Orthophoto Quadrangle FAC Full Aperture Calibrator ECS EOSDIS Core System EOS Earth Observing System EOSAT Earth Observation Satellite Company EOSDIS EOS Data and Information System EPGS EOS Polar Ground Sites EROS Earth Resources Observation Systems ETM Enhanced Thematic Mapper ETM+ Enhanced Thematic Mapper Plus FTP File Transfer Protocol FDF Flight Dynamics Facility GeoTIFF Geographic Tagged Image File Format GSD Ground Sample Distance HDF Hierarchical Data Format IAS Image Assessment System IFOV Instantaneous Field of View IGS International Ground Stations IOC Initial On-orbit Checkout IAD Ion Assisted Deposition IR Infrared JPL Jet Propulsion Laboratory LGS Landsat Ground Station LP-DAAC Land Processes Distributed Active Archive Center LPGS Level-1 Product Generation System LPS Landsat Processing System LTAP Long Term Acquisition Plan ME Memory Effect MOC Mission Operations Center MMS multimission modular spacecraft MSCD Mirror Scan Correction Data MTF Modulation Transfer Function NCEP National Centers for Environmental Prediction NISN NASA Integrated Services Network NLAPS National Landsat Archive Production System PAC Partial Solar Calibrator SCS Scan Correlated Shift SLC Scan Line Corrector SMA Scan Mirror Assembly SME Scan Mirror Electronics SWIR Short Wave Infrared SNR Signal to Noise Ratio SGS Svalbard Ground Station SRR Solid State Recorder TOA Top-of-Atmosphere TDRS Tracking Data and Relay Satellites TM Thematic Mapper USAF United State Air Force USGS United States Geological Survey VNIR Visible & Near Infrared WFF Wallops Flight Facility WGS World Geodetic System WRS Worldwide Reference System Table of Contents Last Update: January 10, 2008 NASA Privacy Statement   and   NASA IT Security Warning Banner