AAI: Absorbing Aerosol Index [[BR]] AI: Aerosol Index[[BR]] AIRS: Atmospheric Infrared Sounder[[BR]] ASTER: Advanced Spaceborne Thermal Emission and Reflection Radiometer[[BR]] AVHRR: Advanced Very High Resolution Radiometer[[BR]] BTD: Brightness Temperature Difference[[BR]] CALIOP: Cloud-Aerosol Lidar with Orthogonal Polarization[[BR]] CALIPSO: Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations[[BR]] CPR: Cloud Profiling Radar[[BR]] DLR: Deutsches Zentrum fur Luft- und Raumfahrt[[BR]] DMSP: Defense Meteorological Satellite Program[[BR]] DOAS: Differential Optical Absorption Spectroscopy[[BR]] ESA: European Space Agency[[BR]] FMI: Finnish Meteorological Institute[[BR]] FTIR: Fourier-Transform Infrared[[BR]] GOES: Geostationary Operational Environmental Satellite[[BR]] GOME: Global Ozone Monitoring Experiment[[BR]] GSFC: Goddard Space Flight Center[[BR]] HIRS: High resolution Infrared Radiation Sounder[[BR]] IASI: Infrared Atmospheric Sounding Interferometer[[BR]] IR: Infrared[[BR]] JAXA: Japan Aerospace Exploration Agency[[BR]] JPSS: Joint Polar Satellite System[[BR]] L1B: Level 1B[[BR]] L2: Level 2[[BR]] L3: Level 3[[BR]] MISR: Multi-angle Imaging Spectroradiometer[[BR]] MLS: Microwave Limb Sounder[[BR]] MSG: Meteosat Second Generation[[BR]] MODIS: Moderate Resolution Imaging Spectroradiometer[[BR]] MTSAT: Multifunctional Transport Satellites[[BR]] NASA: National Aeronautical and Space Administration[[BR]] NOAA: National Oceanic and Atmospheric Administration[[BR]] NPOESS: National Polar-orbiting Operational Environmental Satellite System[[BR]] NPP: NPOESS Preparatory Project[[BR]] OCO: Orbiting Carbon Observatory[[BR]] OMI: Ozone Monitoring Instrument[[BR]] OMPS: Ozone Mapping and Profiler Suite[[BR]] POES: Polar Operational Environmental Satellite[[BR]] SCIAMACHY: Scanning Imaging Absorption Spectrometer for Atmospheric Cartography[[BR]] SEVIRI: Spinning Enhanced Visible and Infrared Imager [[BR]] UV: Ultraviolet[[BR]] VAAC: Volcanic Ash Advisory Center[[BR]]