Accession Number : AD0646730

Title :   MICROWAVE RADIOMETRIC STUDIES IN RELATION TO MINE DETECTION,

Corporate Author : ARMY ENGINEER RESEARCH AND DEVELOPMENT LABS FORT BELVOIR VA

Personal Author(s) : Johnson,Charles N. ; Gravitte,Dwight L.

Report Date : NOV 1966

Pagination or Media Count : 89

Abstract : Field investigations over clay-type soils of the Fort Belvoir area indicated that microwave radiometry is highly unsuitable for mine detection for the following reasons: (1) Numerous strong and highly variable radiation signals from soils almost completely mask mine detection signals even under the most favorable summer conditions. (During moist soil and thermally neutral conditions which prevail during much of the spring, fall, and winter, detection performance can be expected to deteriorate even more.) (2) Microwave radiation originates in upper 2 in. to 4 in. of soil of moderate moisture content (13 to 20 percent) because of soil attenuation. When soil moisture approaches saturation conditions (30 to 40 percent), emitted radiation is confined to surface. (3) Strong similarity exists between thermal responses of microwave radiometer and typical infrared detector to mine signals. Infrared detector offers greater potential promise because of image-forming capability obtainable with high inherent resolution of infrared compared to microwave frequencies. (Author)

Descriptors :   (*MINE DETECTORS, LAND MINES), (*RADIOMETERS, MINE DETECTORS), THERMAL RADIATION, CLAY, PERFORMANCE(ENGINEERING), MICROWAVES, RADIOFREQUENCY INTERFERENCE, SOILS, MOISTURE, TEMPERATURE, REFLECTIVITY

Subject Categories : Ammunition and Explosives
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE