Electromagnetic Subsurface Measurements.

In 1974, personnel at the U.S. Army Cold Regions Research and Engineering Laboratory (CRREL) began using an impulse radar system to profile accumulations of ice forms. Through field experience, the system has been modified so that it can be effectively used as a profiling system in a ground or airbo...

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Bibliographic Details
Main Author: Dean,Arnold M , Jr
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
Format: Text
Language:English
Published: 1981
Subjects:
Active & Passive Radar Detection & Equipment
*PROFILOMETERS
*RADAR EQUIPMENT
*RADAR PULSES
COMPUTER PROGRAMS
MEASUREMENT
ARMY RESEARCH
WATER
AIRBORNE
INTENSITY
COLD REGIONS
RADAR
FRESH WATER
PENETRATION
SNOW
ENGINEERING
PULSES
LIMITATIONS
CONFIGURATIONS
LABORATORY PROCEDURES
LABORATORIES
NOISE
RIVERS
BANKS(WATERWAYS)
SUBSURFACE
SEA ICE
PERMAFROST
ICEBERGS
REVETMENTS
Frazil ice
Water penetrating radar
Brash ice
Oil detection
Underwater radar signals
Sheet ice
Water(Air Entrained)
Ice jams
Gas detection
LPN-CWIS-31350
Cold Regions Research and Engineering Laboratory
Ice
permafrost
Sea ice
Online Access:http://www.dtic.mil/docs/citations/ADA108192
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA108192
Description
Summary:In 1974, personnel at the U.S. Army Cold Regions Research and Engineering Laboratory (CRREL) began using an impulse radar system to profile accumulations of ice forms. Through field experience, the system has been modified so that it can be effectively used as a profiling system in a ground or airborne configuration, in certain high-noise environments. The system can penetrate fresh water and media with a high water content. For instance, frazil and brash ice accumulations with approximately 50% water have been profiled to a depth of 25 to 35 ft. As a result of the CRREL modifications, the system has found extensive and varied applications as a low-level remote sensing tool. Applications include profiling ice accumulations (including ice jams), river beds, sheet ice, permafrost, subsurface ice masses, river bank revetments through air-entrained water, snow covers, sea ice, icebergs, and peat bogs. Limited laboratory work has also shown that the impulse radar system may be able to detect oil and gas under sea ice. Selected applications and data are presented. Since it has been used mainly for research, the CRREL system needs further development to make it useful to operational units. Additional development of hardware and software is recommended.

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