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AIRBORNE
Ice and Permafrost
4
Snow
4
PE61102A
3
RADAR
3
SHORT PULSES
3
*ICE
2
ARCTIC REGIONS
2
Active & Passive Radar Detection & Equipment
2
COVERINGS
2
FRESH WATER
2
GROUND LEVEL
2
HELICOPTERS
2
RADAR PULSES
2
SURVEYS
2
THICKNESS
2
WATER
2
WU014
2
*BRASH ICE
1
*ELECTROMAGNETIC WAVE PROPAGATION
1
*ICE JAMS
1
*Ice
1
*RADAR RECONNAISSANCE
1
*RIVER ICE
1
*Radar reflections
1
*SEA ICE
1
*SIGNAL PROCESSING
1
*Signal processing
1
*WATER RESOURCES
1
AERIAL RECONNAISSANCE
1
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