Accession Number : AD0669923

Title :   PASSIVE MICROWAVE MEASUREMENTS OF SNOW, SOILS, AND SNOW-ICE-WATER SYSTEMS.

Descriptive Note : Technical rept. no. 4, 1 Jan-15 Nov 67,

Corporate Author : AEROJET-GENERAL CORP EL MONTE CALIF SPACE DIV

Personal Author(s) : Edgerton,A. T. ; Mandl,R. M. ; Poe,G. A. ; Jenkins,J. E. ; Soltis,F.

Report Date : 15 FEB 1968

Pagination or Media Count : 363

Abstract : The report summarizes field and laboratory investigations conducted to determine the microwave emission characteristics of a number of natural materials. These experiments demonstrate a useful relationship between the microwave brightness temperature and moisture content of soils and sediments. Small changes in soil moisture content can be measured by means of microwave radiometry. Other experiments have shown that multifrequency microwave measurements can provide an indication of the particle or fragment size distribution of exposed sediments. Laboratory measurements of ice-water systems demonstrate that definite relationships exist between the microwave temperatures and thickness of ice layers. Experiments were conducted with ice formed from both fresh and ocean water. (Author)

Descriptors :   (*SOIL MECHANICS, *RADIOMETERS), (*MOISTURE, MEASUREMENT), MICROWAVE FREQUENCY, SURFACE ROUGHNESS, SURFACE PROPERTIES, SURFACE TEMPERATURE, SNOW, ICE, SOILS, DENSITY, CONDUCTIVITY, LIMESTONE, EMISSIVITY, MICROWAVE EQUIPMENT, PHYSICAL PROPERTIES

Subject Categories : Soil Mechanics
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE