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ADMINISTRATIVE DIVISIONS|SURVEYS|HUMAN OBSERVER
1
ALPINE/TUNDRA|AVHRR|NOAA-15, -16, -17, -18, and -19 SATELLITES
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Antarctic Circle
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Arctic Circle
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CARBON DIOXIDE|ANALYSIS|LABORATORY
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CONTOURS|GPS (GLOBAL POSITIONING SYSTEM)|GROUND-BASED OBSERVATION
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ERS-1 (EUROPEAN REMOTE SENSING SATELLITE-1)
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FIRN|MODIS|TERRA / AQUA
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GEOMAGNETIC POLES|ANALYSIS|GEOMAGNETIC OBSERVATORIES
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GLACIER ELEVATION/ICE SHEET ELEVATION|RADAR ALTIMETER|ERS-1 (EUROPEAN REMOTE SENSING SATELLITE-1)
GLACIER TOPOGRAPHY/ICE SHEET TOPOGRAPHY|ANALYSIS|DIGITAL ELEVATION MODEL
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GLACIERS
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GLACIERS|ASTER|TERRA (AM-1)
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GLACIERS|ETM+|LANDSAT-7
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GLACIERS|RADAR ALTIMETER|ERS-1 (EUROPEAN REMOTE SENSING SATELLITE-1)
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GROUND ICE|ANALYSIS|COMPUTER MODEL
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ICE DEPTH/THICKNESS|ICE PENETRATING RADAR|AIRCRAFT
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ICE EXTENT|SCANNING MULTI-CHANNEL MICROWAVE RADIOMETER (SMMR)|DMSP SATELLITES
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ICE EXTENT|SPECIAL SENSOR MICROWAVE/IMAGER (SSM/I)|DMSP SATELLITES
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ICE GROWTH/MELT|SCANNING MULTI-CHANNEL MICROWAVE RADIOMETER (SMMR)|DMSP SATELLITES
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ICE GROWTH/MELT|SPECIAL SENSOR MICROWAVE/IMAGER (SSM/I)|DMSP SATELLITES
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ICE SHEETS|MODIS|TERRA / AQUA
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ICE SHEETS|RADAR ALTIMETER|ERS-1 (EUROPEAN REMOTE SENSING SATELLITE-1)
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LANDFORMS|GPS (GLOBAL POSITIONING SYSTEM)|GROUND-BASED OBSERVATION
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MEGADUNES|GROUND-PENETRATING RADAR|SNOWMOBILES
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PERMAFROST|ANALYSIS|COMPUTER MODEL
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RADAR ALTIMETER
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SEA ICE CONCENTRATION|SCANNING MULTI-CHANNEL MICROWAVE RADIOMETER (SMMR)|DMSP SATELLITES
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SEA ICE CONCENTRATION|SPECIAL SENSOR MICROWAVE/IMAGER (SSM/I)|DMSP SATELLITES
1
SNOW COVER|ANALYSIS|GLOBAL SEASONAL SNOW CLASSIFICATION SYSTEM
1
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