Accession Number : ADA132923

Title :   Cavity Detection and Delineation Research. Report 5. Electromagnetic (Radar) Techniques Applied to Cavity Detection.

Descriptive Note : Technical rept.,


Personal Author(s) : Ballard,Robert F , Jr

PDF Url : ADA132923

Report Date : Jul 1983

Pagination or Media Count : 110

Abstract : This study evaluated four different radar systems to determine their effectiveness in locating subterranean cavities. Tests were conducted at three well-documented sites: Vicksburg, Miss.; Medford Cave, Fla. (near Ocala); and Manatee Springs, Fla. (near Chiefland). None of the radar systems was effective at the Vicksburg, Miss., site because of extremely high conductivities encountered in the overburden materials which were comprised primarily of silts (loess) and clays. The following radar systems were used in this study: (a) A pulsed system fabricated and operated by personnel from Texas A/M University; (b) A pulsed system commercially manufactured by GSSI operated by the owners, Technos, Inc.; (c) A pulsed system developed, fabricated, and operated by personnel from SwRI, and (d) A continuous wave system development, fabricated and operated by personnel from LLNL.

Descriptors :   *Caves, *Radar deception, *Cavities, *Radar targets, *Radar antennas, *Structural geology, Very high frequency, Surveys, Electrical conductivity, Radar pulses, Silt, Range(Distance), Radar operators, Mississippi, Underground, Texas, Dielectrics, Radar, Personnel, Conductivity, Radar equipment, Rock, Moisture, Detection, Pulses

Subject Categories : Geology, Geochemistry and Mineralogy
      Hydrology, Limnology and Potamology
      Active & Passive Radar Detection & Equipment
      Electromagnetic Pulses

Distribution Statement : APPROVED FOR PUBLIC RELEASE