Accession Number : AD0713911

Title :   Automatic Processing of Arctic Pack Ice Data Obtained by Means of Submarine Sonar and Other Remote Sensing Techniques.

Descriptive Note : Technical rept. 1 Dec 69-15 Sep 70,

Corporate Author : DEVELOPMENT AND RESOURCES TRANSPORTATION CO SILVER SPRING MD

Personal Author(s) : LeSchack,Leonard A. ; Hibler,William D. ; Morse,Frederick H.

Report Date : SEP 1970

Pagination or Media Count : 57

Abstract : Automatic processing and analysis of three types of remote sensing data of arctic pack ice are described. The primary emphasis is on upward-looking sonar profiles of the underside of pack ice obtained during the winter 1960 arctic cruise of the SSN 583, SARGO. Two traverses, one in the Chukchi Sea and one in the Beaufort Sea were studied. Segments of the profiles were analyzed by power spectrum and frequency distribution of amplitude techniques. Power spectrum analysis indicated preferred spacing of pressure ridges with apparent periods of 20-25, 35-40 and 80-100 m. Comparison of the power spectra of two profiles intersecting at a right angle showed the expected spatial period shift of significant ice ridge ensembles and so suggests a potential real-time technique for determining, from submarines cruising submerged, ice ridge orientation. (Author)

Descriptors :   (*SEA ICE, ARCTIC REGIONS), (*DETECTORS, SEA ICE), SUBMARINES, SONAR EQUIPMENT, POWER SPECTRA, DATA PROCESSING, AIRBORNE, LASERS, INFRARED SCANNING, THICKNESS, NAVIGATION, INFRARED IMAGES, SURFACE TEMPERATURE, ICE ISLANDS, CHUKCHI SEA

Subject Categories : Snow, Ice and Permafrost
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE