PASSIVE MICROWAVE MEASUREMENTS OF SNOW AND SOIL. VOLUME II. ANALYSIS.

The program for the passive microwave radiometric measurements of snow was expanded to include beach sands, marine swamp, and playa lake beds. Data obtained on in situ materials further confirmed that moisture content is an important parameter, probably the most important one, affecting radiometric...

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Bibliographic Details
Main Authors: Kennedy,J. M., Edgerton,A. T., Sakamoto,R. T., Mandl,R. M.
Other Authors: SPACE-GENERAL CORP EL MONTE CALIF
Format: Text
Language:English
Published: 1966
Subjects:
Soil Mechanics
Snow
Ice and Permafrost
Civil Engineering
*SNOW
*SOILS
*ELECTROMAGNETIC PROBES
*MICROWAVE EQUIPMENT
TEST METHODS
MICROWAVE FREQUENCY
ELECTROMAGNETIC PROBES
BEACHES
SWAMPS
PLAYAS
SAND
MUD
ROCK
MOISTURE
RADIOMETERS
GEOPHYSICS
WATER
BRIGHTNESS
TEMPERATURE
MELTING
DENSITY
THICKNESS
DIELECTRIC PROPERTIES
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/AD0647257
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0647257
Description
Summary:The program for the passive microwave radiometric measurements of snow was expanded to include beach sands, marine swamp, and playa lake beds. Data obtained on in situ materials further confirmed that moisture content is an important parameter, probably the most important one, affecting radiometric brightness temperatures. The effect of water seems to be independent of the base material, so that increasing the free water content has a similar effect whether the base material is snow, soil or sand. The brightness temperature varies with changing water content in slightly different degrees for different materials, but the effect is similar. The theoretical prediction that the melt condition of new snow, as well as old snow, can be measured using microwave radiometers has been further confirmed. Also, it seems highly probably that both density and snow thickness may be determined by careful analysis of microwave data.

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