Surface configuration of the Antarctic ice sheet in the sector 30゜E - 80゜E using SEASAT altimetry data
Using Interim Geophysical Data Record (IGDR) of SEASAT radar altimetry, a configuration map of the Antarctic ice sheet in the area bounded by 30°and 80°E and latitude 72°S is compiled. A total of 7480 footprint data of every second sampling (6.62km apart) along 63 subsatellite groundtracks are obtai...
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National Institute of Polar Research
1986
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ftnipr:oai:nipr.repo.nii.ac.jp:00002008 2023-05-15T13:47:59+02:00 Surface configuration of the Antarctic ice sheet in the sector 30゜E - 80゜E using SEASAT altimetry data Kazuo Shibuya Yuko Kajikawa Jiro Segawa 1986-09 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2008 http://id.nii.ac.jp/1291/00002008/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2008&item_no=1&attribute_id=18&file_no=1 en eng National Institute of Polar Research Department of Physics, Tokai University Ocean Research Institute, University of Tokyo https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2008 http://id.nii.ac.jp/1291/00002008/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 43, 1-12(1986-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2008&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1986 ftnipr 2022-11-12T19:42:52Z Using Interim Geophysical Data Record (IGDR) of SEASAT radar altimetry, a configuration map of the Antarctic ice sheet in the area bounded by 30°and 80°E and latitude 72°S is compiled. A total of 7480 footprint data of every second sampling (6.62km apart) along 63 subsatellite groundtracks are obtained in the area. The area was divided into rectangles with side lengths of 0.1°in latitude and 0.4°in longitude, and the average elevation above sea level by SEASAT altimetry data within the rectangle is used for computer-aided contouring. Since the height error for 147 crossover points on the ice sheet was±6.7m in standard deviation, and height errors from slope-induced effect and other sources were 20m, the contour interval of 100m was chosen for an inland area higher than 500m above sea level. The obtained configuration resembles the map published by the Scott Polar Research Institute (1983). A total of 157 ground survey data from triangulation survey, satellite Doppler positioning and previously published topographic map are used to estimate an overall accuracy of the obtained configuration map. The ground survey height is on an average 2.2m lower than the SEASAT-derived elevation with a standard deviation of ±21.5m, which may reflect the limited data quality of IGDR without retracking correction of the return-pulse waveform. Drawing orthogonals to the contours, ice drainage basins are determined and they are slightly different from the previous ones defined by the over-snow traverse surveys. Report Antarc* Antarctic Ice Sheet Memoirs of National Institute of Polar Research Polar Research Scott Polar Research Institute National Institute of Polar Research Repository, Japan Antarctic The Antarctic |
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Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
Using Interim Geophysical Data Record (IGDR) of SEASAT radar altimetry, a configuration map of the Antarctic ice sheet in the area bounded by 30°and 80°E and latitude 72°S is compiled. A total of 7480 footprint data of every second sampling (6.62km apart) along 63 subsatellite groundtracks are obtained in the area. The area was divided into rectangles with side lengths of 0.1°in latitude and 0.4°in longitude, and the average elevation above sea level by SEASAT altimetry data within the rectangle is used for computer-aided contouring. Since the height error for 147 crossover points on the ice sheet was±6.7m in standard deviation, and height errors from slope-induced effect and other sources were 20m, the contour interval of 100m was chosen for an inland area higher than 500m above sea level. The obtained configuration resembles the map published by the Scott Polar Research Institute (1983). A total of 157 ground survey data from triangulation survey, satellite Doppler positioning and previously published topographic map are used to estimate an overall accuracy of the obtained configuration map. The ground survey height is on an average 2.2m lower than the SEASAT-derived elevation with a standard deviation of ±21.5m, which may reflect the limited data quality of IGDR without retracking correction of the return-pulse waveform. Drawing orthogonals to the contours, ice drainage basins are determined and they are slightly different from the previous ones defined by the over-snow traverse surveys. |
format |
Report |
author |
Kazuo Shibuya Yuko Kajikawa Jiro Segawa |
spellingShingle |
Kazuo Shibuya Yuko Kajikawa Jiro Segawa Surface configuration of the Antarctic ice sheet in the sector 30゜E - 80゜E using SEASAT altimetry data |
author_facet |
Kazuo Shibuya Yuko Kajikawa Jiro Segawa |
author_sort |
Kazuo Shibuya |
title |
Surface configuration of the Antarctic ice sheet in the sector 30゜E - 80゜E using SEASAT altimetry data |
title_short |
Surface configuration of the Antarctic ice sheet in the sector 30゜E - 80゜E using SEASAT altimetry data |
title_full |
Surface configuration of the Antarctic ice sheet in the sector 30゜E - 80゜E using SEASAT altimetry data |
title_fullStr |
Surface configuration of the Antarctic ice sheet in the sector 30゜E - 80゜E using SEASAT altimetry data |
title_full_unstemmed |
Surface configuration of the Antarctic ice sheet in the sector 30゜E - 80゜E using SEASAT altimetry data |
title_sort |
surface configuration of the antarctic ice sheet in the sector 30゜e - 80゜e using seasat altimetry data |
publisher |
National Institute of Polar Research |
publishDate |
1986 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2008 http://id.nii.ac.jp/1291/00002008/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2008&item_no=1&attribute_id=18&file_no=1 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Ice Sheet Memoirs of National Institute of Polar Research Polar Research Scott Polar Research Institute |
genre_facet |
Antarc* Antarctic Ice Sheet Memoirs of National Institute of Polar Research Polar Research Scott Polar Research Institute |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2008 http://id.nii.ac.jp/1291/00002008/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 43, 1-12(1986-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2008&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766248334791540736 |