Microwave holographic imaging of underground objects
The resolving capability of underground imaging radar employing a multifrequency holographic approach is characterized in terms of controlling parameters such as the synthetic aperture length, soil conductivity and dielectric constant, and antenna beamwidth. The propagation velocity of electromagnetic wave in soil, which varies from soil to soil, is an essential parameter for reconstructing object images using the holographic approach. Hence, a method of estimating the propagation velocity and also the depth of an object from a pulse-echo image based on the minimum squared error is proposed. The result of underground object image reconstruction from real pulse-echo data is reported to demonstrate high estimation accuracy of the propagation velocity and fine resolution of the reconstructed image.
- Research Organization:
- Musashino Electrical Communication Laboratory, Nippon Telegraph and Telephone Public Corporation, Musashino-Shi, Tokyo
- OSTI ID:
- 5174878
- Journal Information:
- IEEE Trans. Antennas Propag.; (United States), Journal Name: IEEE Trans. Antennas Propag.; (United States) Vol. AP 33:2; ISSN IETPA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
580203* -- Geophysics-- Geophysical Survey Methods-- (1980-1989)
ELECTRICAL SURVEYS
ELECTROMAGNETIC RADIATION
ELECTROMAGNETIC SURVEYS
GEOPHYSICAL SURVEYS
HOLOGRAPHY
IMAGE PROCESSING
MEASURING INSTRUMENTS
MECHANICS
MICROWAVE RADIATION
PHASE VELOCITY
PROCESSING
RADAR
RADIATIONS
RANGE FINDERS
RESOLUTION
SOIL MECHANICS
SOILS
SURVEYS
SYNTHETIC-APERTURE RADAR
VELOCITY
WAVE PROPAGATION