Proposal for Measuring the Movement of a Large Ice Sheet by Observing Radio Echoes
Abstract The proposed method is to use a radio-echo sounder located on the surface of the ice sheet and to record the shape of the pulses returned from the rock bed. If the instrument is moved horizontally, the shape of the returning pulse will change, large differences occurring in horizontal dista...
Published in: | Journal of Glaciology |
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Language: | English |
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Cambridge University Press (CUP)
1972
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Online Access: | http://dx.doi.org/10.1017/s0022143000022292 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000022292 |
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crcambridgeupr:10.1017/s0022143000022292 2024-03-03T08:45:25+00:00 Proposal for Measuring the Movement of a Large Ice Sheet by Observing Radio Echoes Nye, J. F. Kyte, R. G. Threlfall, D. C. 1972 http://dx.doi.org/10.1017/s0022143000022292 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000022292 en eng Cambridge University Press (CUP) Journal of Glaciology volume 11, issue 63, page 319-325 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1972 crcambridgeupr https://doi.org/10.1017/s0022143000022292 2024-02-08T08:40:37Z Abstract The proposed method is to use a radio-echo sounder located on the surface of the ice sheet and to record the shape of the pulses returned from the rock bed. If the instrument is moved horizontally, the shape of the returning pulse will change, large differences occurring in horizontal distances of the order of the wavelength of the radiation, say 5 m. The spatial pattern of this variation, being largely determined by the details of the reflecting rock bed, is expected to remain fixed in position while the ice moves. It thus forms a fixed reference against which ice movement can be measured at places far removed from fixed landmarks. Analogue experiments in the laboratory, using ultrasonic waves in air in place of radio waves in ice, suggest that it should be easy to detect a movement of λ /10, 0.5 m, and, with further refinement, much smaller movements. A field test is in preparation. Article in Journal/Newspaper Ice Sheet Journal of Glaciology Cambridge University Press Journal of Glaciology 11 63 319 325 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Nye, J. F. Kyte, R. G. Threlfall, D. C. Proposal for Measuring the Movement of a Large Ice Sheet by Observing Radio Echoes |
topic_facet |
Earth-Surface Processes |
description |
Abstract The proposed method is to use a radio-echo sounder located on the surface of the ice sheet and to record the shape of the pulses returned from the rock bed. If the instrument is moved horizontally, the shape of the returning pulse will change, large differences occurring in horizontal distances of the order of the wavelength of the radiation, say 5 m. The spatial pattern of this variation, being largely determined by the details of the reflecting rock bed, is expected to remain fixed in position while the ice moves. It thus forms a fixed reference against which ice movement can be measured at places far removed from fixed landmarks. Analogue experiments in the laboratory, using ultrasonic waves in air in place of radio waves in ice, suggest that it should be easy to detect a movement of λ /10, 0.5 m, and, with further refinement, much smaller movements. A field test is in preparation. |
format |
Article in Journal/Newspaper |
author |
Nye, J. F. Kyte, R. G. Threlfall, D. C. |
author_facet |
Nye, J. F. Kyte, R. G. Threlfall, D. C. |
author_sort |
Nye, J. F. |
title |
Proposal for Measuring the Movement of a Large Ice Sheet by Observing Radio Echoes |
title_short |
Proposal for Measuring the Movement of a Large Ice Sheet by Observing Radio Echoes |
title_full |
Proposal for Measuring the Movement of a Large Ice Sheet by Observing Radio Echoes |
title_fullStr |
Proposal for Measuring the Movement of a Large Ice Sheet by Observing Radio Echoes |
title_full_unstemmed |
Proposal for Measuring the Movement of a Large Ice Sheet by Observing Radio Echoes |
title_sort |
proposal for measuring the movement of a large ice sheet by observing radio echoes |
publisher |
Cambridge University Press (CUP) |
publishDate |
1972 |
url |
http://dx.doi.org/10.1017/s0022143000022292 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000022292 |
genre |
Ice Sheet Journal of Glaciology |
genre_facet |
Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology volume 11, issue 63, page 319-325 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000022292 |
container_title |
Journal of Glaciology |
container_volume |
11 |
container_issue |
63 |
container_start_page |
319 |
op_container_end_page |
325 |
_version_ |
1792500966852919296 |