Investigation of the Properties of Radar Backscatter from Sea Ice.

• Main Authors: Moore,R K, Williams,T H L, Onstott,R G
• Other Authors: KANSAS UNIV/CENTER FOR RESEARCH INC LAWRENCE REMOTE SENSING LAB
• Format: Text
• Language: English
• Published: 1985
• Subjects: Snow; Ice and Permafrost; Radiofrequency Wave Propagation; *BACKSCATTERING; *RADAR REFLECTIONS; *SEA ICE; SIMULATION; MEASUREMENT; POLARIZATION; ARMY RESEARCH; CHEMICAL PROPERTIES; PHYSICAL PROPERTIES; SURFACE ROUGHNESS; PASSIVE SYSTEMS; MICROWAVES; ELECTRICAL PROPERTIES; DEPTH; ICE; SHEETS; REMOTE DETECTORS; ANTENNAS; TABLES(DATA); GREASES; ANGLE OF INCIDENCE; SPECTROMETERS; IMPLANTATION; ARCTIC OCEAN; WUNR307383; Arctic; Arctic Ocean; Cold Regions Research and Engineering Laboratory; Ice; Ice Sheet; permafrost; Sea ice
• Online Access: http://www.dtic.mil/docs/citations/ADA160788; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA160788

Active microwave measurements have been made in conjunction with passive microwave measurements of saline ice. Simulated Arctic sea ice was grown in an approximately 5 m x 15 m tank at the U.S. Army Cold Regions Research and Engineering Laboratory (CRREL), thereby simplifying experimentation and control of the physical and chemical properties of the ice sheets. Radar backscatter measurements were made at 5.2, 9.6, 13.6, and 16.6 GHz. Antenna polarizations include vertical, horizontal and cross. Angles of incidence range from 0 deg from vertical to 50 deg. Scenes investigated include water, grease ice, dark nilas, grey ice, grey ice with a roughened surface, grey ice with a 5-cm snow cover and ice which had grown to 30 cm. In addition, the influence of small-scale surface roughness and snow were examined. Conducting screens were implanted at three depths and observed by a vertical-viewing radar to investigate the lossy nature of the ice sheet.