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SHORT-PULSE ELECTROMAGNETIC TRANSPONDER FOR HOLE-TO-HOLE USE.

IEEE Transactions on Geoscience and Remote Sensing

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Abstract

Hole-to-hole observations were made through nearly 20 m of granite using an electromagnetic transponder (an active reflector) in one borehole and a single-hole short-pulse radar in another. The transponder is inexpensive, operationally simple, and effective in extending the capability of a short-pulse borehole radar system to allow hole-to-hole operation without requiring timing cables. A detector in the transponder senses the arrival of each pulse from the radar. Each pulse detection triggers a kilovolt-amplitude pulse for retransmission. The transponder 'echo' may be stronger than that of a passive reflector by a factor of as much as 120 db. The result is an increase in range capability by a factor which depends on attenuation in the medium and hole-to-hole wavepath geometry.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
SHORT-PULSE ELECTROMAGNETIC TRANSPONDER FOR HOLE-TO-HOLE USE.
Series title:
IEEE Transactions on Geoscience and Remote Sensing
Volume
GE-22
Issue:
6
Year Published:
1983
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
IEEE Transactions on Geoscience and Remote Sensing
First page:
720
Last page:
725
Number of Pages:
6
Conference Title:
Int Geosci and Remote Sens Symp (IGARSS '83), Remote Sens, Extending Man's Horiz
Conference Location:
San Francisco, CA, USA
Conference Date:
31 August 1983 through 2 September 1983