SEA GRAVITY MEASUREMENTS DURING THE 27TH JAPANESE ANTARCTIC RESEARCH EXPEDITION
Sea gravity measurements on board the icebreaker SHIRASE were continuously conducted during the 27th Japanese Antarctic Research Expedition. The NIPR-ORI sea gravity meter which was improved to get the on-line navigation data was employed in this cruise. Using those navigation data, we could success...
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ftnipr:oai:nipr.repo.nii.ac.jp:00002542 2023-05-15T13:48:59+02:00 SEA GRAVITY MEASUREMENTS DURING THE 27TH JAPANESE ANTARCTIC RESEARCH EXPEDITION フクダ ヨウイチ セガワ ジロウ カミヌマ カツタダ Yoichi FUKUDA Jiro SEGAWA Katsutada KAMINUMA 1987-09 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2542 http://id.nii.ac.jp/1291/00002542/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2542&item_no=1&attribute_id=18&file_no=1 en eng ABSTRACT Faculty of Science, Hirosaki University Ocean Research Institute, University of Tokyo National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2542 http://id.nii.ac.jp/1291/00002542/ AA1072335X Proceedings of the NIPR Symposium on Antarctic Geosciences, 1, 193(1987-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2542&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1987 ftnipr 2022-11-19T19:41:20Z Sea gravity measurements on board the icebreaker SHIRASE were continuously conducted during the 27th Japanese Antarctic Research Expedition. The NIPR-ORI sea gravity meter which was improved to get the on-line navigation data was employed in this cruise. Using those navigation data, we could successfully obtain free-air and Bouguer anomalies on board. Although we have confirmed the advantages of on-line data processing, we cannot avoid the off-line data processing after the cruise to correct the uncertain positioning of navigation system and to calibrate the gravity sensor. The main parts of the off-line data processing were as follows : (1) Determine the scale constants and drift rate of the gravity sensor. (2) Redetermine the measuring positions using updated satellite positions. (3) Recalculate the values of Eotvos, free-air and Bouguer corrections. By these processings, we have obtained gravity anomalies within an accuracy of a few mgals in most cases throughout the cruise. One of the interesting features of gravity anomalies was obtained on the Gunnerus ridge located off the Riiser-Larsen peninsula. The complete gravity data across the ridge has been obtained in this cruise for the first time. Therefore, we intend to study the detail structure of this area from the geophysical points of view. Report Antarc* Antarctic National Institute of Polar Research Repository, Japan Antarctic Riiser-Larsen ENVELOPE(50.667,50.667,-66.783,-66.783) Gunnerus Ridge ENVELOPE(33.750,33.750,-66.500,-66.500) Riiser-Larsen Peninsula ENVELOPE(34.000,34.000,-68.917,-68.917) |
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Open Polar |
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National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
Sea gravity measurements on board the icebreaker SHIRASE were continuously conducted during the 27th Japanese Antarctic Research Expedition. The NIPR-ORI sea gravity meter which was improved to get the on-line navigation data was employed in this cruise. Using those navigation data, we could successfully obtain free-air and Bouguer anomalies on board. Although we have confirmed the advantages of on-line data processing, we cannot avoid the off-line data processing after the cruise to correct the uncertain positioning of navigation system and to calibrate the gravity sensor. The main parts of the off-line data processing were as follows : (1) Determine the scale constants and drift rate of the gravity sensor. (2) Redetermine the measuring positions using updated satellite positions. (3) Recalculate the values of Eotvos, free-air and Bouguer corrections. By these processings, we have obtained gravity anomalies within an accuracy of a few mgals in most cases throughout the cruise. One of the interesting features of gravity anomalies was obtained on the Gunnerus ridge located off the Riiser-Larsen peninsula. The complete gravity data across the ridge has been obtained in this cruise for the first time. Therefore, we intend to study the detail structure of this area from the geophysical points of view. |
format |
Report |
author |
フクダ ヨウイチ セガワ ジロウ カミヌマ カツタダ Yoichi FUKUDA Jiro SEGAWA Katsutada KAMINUMA |
spellingShingle |
フクダ ヨウイチ セガワ ジロウ カミヌマ カツタダ Yoichi FUKUDA Jiro SEGAWA Katsutada KAMINUMA SEA GRAVITY MEASUREMENTS DURING THE 27TH JAPANESE ANTARCTIC RESEARCH EXPEDITION |
author_facet |
フクダ ヨウイチ セガワ ジロウ カミヌマ カツタダ Yoichi FUKUDA Jiro SEGAWA Katsutada KAMINUMA |
author_sort |
フクダ ヨウイチ |
title |
SEA GRAVITY MEASUREMENTS DURING THE 27TH JAPANESE ANTARCTIC RESEARCH EXPEDITION |
title_short |
SEA GRAVITY MEASUREMENTS DURING THE 27TH JAPANESE ANTARCTIC RESEARCH EXPEDITION |
title_full |
SEA GRAVITY MEASUREMENTS DURING THE 27TH JAPANESE ANTARCTIC RESEARCH EXPEDITION |
title_fullStr |
SEA GRAVITY MEASUREMENTS DURING THE 27TH JAPANESE ANTARCTIC RESEARCH EXPEDITION |
title_full_unstemmed |
SEA GRAVITY MEASUREMENTS DURING THE 27TH JAPANESE ANTARCTIC RESEARCH EXPEDITION |
title_sort |
sea gravity measurements during the 27th japanese antarctic research expedition |
publisher |
ABSTRACT |
publishDate |
1987 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2542 http://id.nii.ac.jp/1291/00002542/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2542&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(50.667,50.667,-66.783,-66.783) ENVELOPE(33.750,33.750,-66.500,-66.500) ENVELOPE(34.000,34.000,-68.917,-68.917) |
geographic |
Antarctic Riiser-Larsen Gunnerus Ridge Riiser-Larsen Peninsula |
geographic_facet |
Antarctic Riiser-Larsen Gunnerus Ridge Riiser-Larsen Peninsula |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2542 http://id.nii.ac.jp/1291/00002542/ AA1072335X Proceedings of the NIPR Symposium on Antarctic Geosciences, 1, 193(1987-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2542&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766250277597347840 |