Subsurface discontinuity detection by microwave radiometry.Brief description of a joint program undertaken near Austin and San Antonio, Tex., to detect the presence of subsurface voids such as caverns and tunnels by microwave radiometry. Mi crowave radiometric temperature measurements using both vertical and horizontal polarization were taken with fixed-view angle traverses across three sites at two locations. No unambiguous correlation between the microwave temperature contours and the subsurface voids was observed at either location, but a correlation between microwave temperature and moisture patterns was observed at both locations. The large microwave temperature anomalies observed at all three sites indicated a sensitivity to near-surface structure and moisture distribution. A close correlation was noted between low soil-bearing strength values and the tunnel location at the San Antonio site.
Document ID
19720028126
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Hruby, R. J. (NASA Ames Research Center Moffett Field, Calif., United States)
Edgerton, A. T. (Aerojet-General Corp. El Monte, Calif., United States)
Date Acquired
August 6, 2013
Publication Date
January 1, 1971
Subject Category
Geophysics
Meeting Information
Meeting: International Symposium on Remote Sensing of Environment, 7th, University of Michigan