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*Acoustic properties
1
*Acoustic sounding
1
*Permafrost
1
*Pulse echo technique
1
Acoustic Detection and Detectors
Acoustic attenuation
1
Acoustic reflection
1
Acoustic velocity
Acoustics
1
Computer programs
1
Ice
1
Ice and Permafrost
1
Interfaces
1
Low frequency
1
Moisture
Reflectivity
1
Snow
1
Soils
1
Sonar echoes
1
Sonar pulses
1
Sounding
1
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