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AERIAL RECONNAISSANCE
3
FREEZING
3
ICE ISLANDS
3
Ice and Permafrost
3
MELTING
3
Meteorology
3
SEA ICE
Snow
3
THICKNESS
3
*WEATHER FORECASTING
2
ARCTIC REGIONS
2
CRACKS
2
DIURNAL VARIATIONS
2
FLIGHT PATHS
2
OBSERVATION AIRCRAFT
2
*ARCTIC OCEAN
1
*ARCTIC REGIONS
1
*ICE FORECASTING
1
ALASKA
1
ARCTIC OCEAN
1
DATA ACQUISITION
1
DATA PROCESSING EQUIPMENT
1
DENMARK STRAIT
1
ELECTRONIC AIRCRAFT
1
GREENLAND
1
GREENLAND SEA
1
INFRARED SCANNING
1
LASERS
1
METEOROLOGICAL CHARTS
1
METEOROLOGICAL RADAR
1
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