SHORT-PULSE ELECTROMAGNETIC TRANSPONDER FOR HOLE-TO-HOLE USE.
IEEE Transactions on Geoscience and Remote Sensing
By: David L. Wright, Raymond D. Watts, and Erik Bramsoe
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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.
| 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 |
| 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 |
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