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