Quasi-parabolic reflecting bottom surfaces of the Drygalski Antarctic floating ice tongue
Very high frequency deep radio sounding systems for ice thickness measurements are practically the only useful apparatuses for large scale radar flight surveys in polar regions. The morphology of the bottom surface of an Antarctic floating ice tongue, in the Ross Sea area, East Antarctica, was studi...
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Istituto Nazionale di Geofisica e Vulcanologia, INGV
2001
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Online Access: | https://www.annalsofgeophysics.eu/index.php/annals/article/view/3580 https://doi.org/10.4401/ag-3580 |
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ftjaog:oai:ojs.annalsofgeophysics.eu:article/3580 2023-05-15T13:54:52+02:00 Quasi-parabolic reflecting bottom surfaces of the Drygalski Antarctic floating ice tongue Bianchi, C. Chiappini, M. Tabacco, I. E. Zirizzotti, A. Zuccheretti, E. 2001-12-25 application/pdf https://www.annalsofgeophysics.eu/index.php/annals/article/view/3580 https://doi.org/10.4401/ag-3580 eng eng Istituto Nazionale di Geofisica e Vulcanologia, INGV https://www.annalsofgeophysics.eu/index.php/annals/article/view/3580/3632 https://www.annalsofgeophysics.eu/index.php/annals/article/view/3580 doi:10.4401/ag-3580 Annals of Geophysics; V. 44 N. 3 (2001) Annals of Geophysics; Vol. 44 No. 3 (2001) 2037-416X 1593-5213 radio echo sounding radio glaciology glacier ice tongues 04.02.05. Downhole radioactivity remote sensing and other methods info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2001 ftjaog https://doi.org/10.4401/ag-3580 2022-03-27T06:36:25Z Very high frequency deep radio sounding systems for ice thickness measurements are practically the only useful apparatuses for large scale radar flight surveys in polar regions. The morphology of the bottom surface of an Antarctic floating ice tongue, in the Ross Sea area, East Antarctica, was studied using the arrival times of signal echoes of the radio sounding system. The amplitude variations of radar signals from the reflecting surface were analyzed to determine the gain or the loss of the reflectors. Such surfaces show quasi-parabolic geometrical shapes at the ice/water interface with both concave and convex faces towards the sounding system. Electromagnetic analysis performed on radar echoes indicates that amplitude variations detected by the antenna are focusing or defocusing effects only due to the reflector's shape. A factor in the radar equation that represents the surface shape when coherent reflectors are involved is introduced. This factor allows us to determine more precisely the morphology and electromagnetic characteristics of the interface between the media investigated by means of radio echo sounding. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ross Sea Annals of Geophysics (INGV, Istituto Nazionale di Geofisica e Vulcanologia) Antarctic East Antarctica Ross Sea Drygalski ENVELOPE(-61.000,-61.000,-64.717,-64.717) Annals of Geophysics 44 3 |
institution |
Open Polar |
collection |
Annals of Geophysics (INGV, Istituto Nazionale di Geofisica e Vulcanologia) |
op_collection_id |
ftjaog |
language |
English |
topic |
radio echo sounding radio glaciology glacier ice tongues 04.02.05. Downhole radioactivity remote sensing and other methods |
spellingShingle |
radio echo sounding radio glaciology glacier ice tongues 04.02.05. Downhole radioactivity remote sensing and other methods Bianchi, C. Chiappini, M. Tabacco, I. E. Zirizzotti, A. Zuccheretti, E. Quasi-parabolic reflecting bottom surfaces of the Drygalski Antarctic floating ice tongue |
topic_facet |
radio echo sounding radio glaciology glacier ice tongues 04.02.05. Downhole radioactivity remote sensing and other methods |
description |
Very high frequency deep radio sounding systems for ice thickness measurements are practically the only useful apparatuses for large scale radar flight surveys in polar regions. The morphology of the bottom surface of an Antarctic floating ice tongue, in the Ross Sea area, East Antarctica, was studied using the arrival times of signal echoes of the radio sounding system. The amplitude variations of radar signals from the reflecting surface were analyzed to determine the gain or the loss of the reflectors. Such surfaces show quasi-parabolic geometrical shapes at the ice/water interface with both concave and convex faces towards the sounding system. Electromagnetic analysis performed on radar echoes indicates that amplitude variations detected by the antenna are focusing or defocusing effects only due to the reflector's shape. A factor in the radar equation that represents the surface shape when coherent reflectors are involved is introduced. This factor allows us to determine more precisely the morphology and electromagnetic characteristics of the interface between the media investigated by means of radio echo sounding. |
format |
Article in Journal/Newspaper |
author |
Bianchi, C. Chiappini, M. Tabacco, I. E. Zirizzotti, A. Zuccheretti, E. |
author_facet |
Bianchi, C. Chiappini, M. Tabacco, I. E. Zirizzotti, A. Zuccheretti, E. |
author_sort |
Bianchi, C. |
title |
Quasi-parabolic reflecting bottom surfaces of the Drygalski Antarctic floating ice tongue |
title_short |
Quasi-parabolic reflecting bottom surfaces of the Drygalski Antarctic floating ice tongue |
title_full |
Quasi-parabolic reflecting bottom surfaces of the Drygalski Antarctic floating ice tongue |
title_fullStr |
Quasi-parabolic reflecting bottom surfaces of the Drygalski Antarctic floating ice tongue |
title_full_unstemmed |
Quasi-parabolic reflecting bottom surfaces of the Drygalski Antarctic floating ice tongue |
title_sort |
quasi-parabolic reflecting bottom surfaces of the drygalski antarctic floating ice tongue |
publisher |
Istituto Nazionale di Geofisica e Vulcanologia, INGV |
publishDate |
2001 |
url |
https://www.annalsofgeophysics.eu/index.php/annals/article/view/3580 https://doi.org/10.4401/ag-3580 |
long_lat |
ENVELOPE(-61.000,-61.000,-64.717,-64.717) |
geographic |
Antarctic East Antarctica Ross Sea Drygalski |
geographic_facet |
Antarctic East Antarctica Ross Sea Drygalski |
genre |
Antarc* Antarctic Antarctica East Antarctica Ross Sea |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ross Sea |
op_source |
Annals of Geophysics; V. 44 N. 3 (2001) Annals of Geophysics; Vol. 44 No. 3 (2001) 2037-416X 1593-5213 |
op_relation |
https://www.annalsofgeophysics.eu/index.php/annals/article/view/3580/3632 https://www.annalsofgeophysics.eu/index.php/annals/article/view/3580 doi:10.4401/ag-3580 |
op_doi |
https://doi.org/10.4401/ag-3580 |
container_title |
Annals of Geophysics |
container_volume |
44 |
container_issue |
3 |
_version_ |
1766261006380564480 |