Accession Number:

AD0647257

Title:

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

Descriptive Note:

Technical rept. no. 2, 2 Sep 65-31 May 66,

Corporate Author:

SPACE-GENERAL CORP EL MONTE CALIF

Personal Author(s):

• Kennedy,J. M.
• Edgerton,A. T.
• Sakamoto,R. T.
• Mandl,R. M.

Report Date:

1966-11-05

Pagination or Media Count:

106.0

Abstract:

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.

Descriptors:

• *SNOW
• *SOILS
• *ELECTROMAGNETIC PROBES
• *MICROWAVE EQUIPMENT
• TEST METHODS
• TEST METHODS
• MICROWAVE FREQUENCY
• ELECTROMAGNETIC PROBES
• BEACHES
• SWAMPS
• PLAYAS
• SAND
• MUD
• ROCK
• MOISTURE
• RADIOMETERS
• GEOPHYSICS
• WATER
• BRIGHTNESS
• TEMPERATURE
• MELTING
• DENSITY
• THICKNESS
• DIELECTRIC PROPERTIES

Subject Categories:

• Soil Mechanics
• Snow, Ice and Permafrost
• Civil Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE