Determining Presence, Thickness, and Electrical Properties of Stratified Media Using Swept-Frequency Radar
Abstract
The ability of swept-frequency radar system operating under field conditions to detect the presence and measure the thickness of layered substrata and to determine the electrical properties of the materials in these substrata was studied. Reflectivity on sections of asphaltic concrete pavement structures (i.e. asphalt highway) of various subsurface layer thicknesses was measured by a specially designed microwave system operating over the frequency range of 0.25 to 8.0 GHz at perpendicular incidence. Test results indicated that swept-frequency radar measurements can be used to estimate power reflectance from the surface material of highway structures and to determine the amplitude of the subsurface contribution.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1972
- Accession Number
- AD0752509
Entities
People
- Jerry R. Lundien