GRACE Gravity Recovery and Climate Experiment

GRAS Global Navigation Satellite System Receiver for Atmospheric Sounding

HES Hyperspectral Environmental Suite

HIRDLS High-Resolution Dynamics Limb Sounder

HIRS High-Resolution Infrared Radiation Sounder

IASI Infrared Atmospheric Sounding Interferometer

ICESat Ice, Cloud and Land Elevation Satellite

IEOS Integrated Earth Observation System

IOCCG International Ocean Colour Coordination Group

IORD Integrated Operational Requirements Document (NPOESS)

IOS Integrated Observing System

IPCC Intergovernmental Panel on Climate Change

IR infrared

IRS Indian Remote Sensing Satellite

ISRO Indian Space Agency

ITAR International Traffic in Arms Regulations

ITSC Information Technology Support Center

JAXA Japan Aerospace Exploration Agency

LAI leaf area index

LDCM Landsat Data Continuity Mission

LEO low Earth orbit

MAM mirror attenuated mosaic

MERIS Medium Resolution Imaging Spectrometer (ESA)

Meteosat Meteorological satellite for European counterpart to GOES

MetOp Meteorological Operational Satellite (European)

METSAT Meteorological Satellite

MIPAS Michelson Interferometer for Passive Atmospheric Sounding

MIS Microwave Imager and Sounder

MISR Multi-Angle Imaging Spectro-Radiometer

MLS microwave limb sounder

MODIS Moderate Resolution Imaging Spectro-Radiometer

MSG Meteosat Second Generation

MSU microwave sounding unit

NASA National Aeronautics and Space Administration

NESDIS National Environmental Satellite Data and Information Service

NESDIS/STAR National Environmental Satellite Data and Information Service/Center for Satellite Applications and Research

NIR near infrared

NIST National Institute of Standards and Technology

NOAA National Oceanic and Atmospheric Administration

NODC National Oceanic Data Center (NOAA)

NPOESS National Polar-orbiting Operational Environmental Satellite System

NPP NPOESS Preparatory Project

NRC National Research Council

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