Decadal progress and results of the GNSS-A seafloor geodetic observation from 2011 to 2020
Average rating
Cast your vote
You can rate an item by clicking the amount of stars they wish to award to this item.
When enough users have cast their vote on this item, the average rating will also be shown.
Star rating
Your vote was cast
Thank you for your feedback
Thank you for your feedback
Author
Watanabe, Shun-ichiDate
2021
Metadata
Show full item recordAbstract
The Japan Coast Guard has been developing and operating seafloor geodetic observation with the GNSS‒ Acoustic ranging combined technique (GNSS-A) for more than 20 years. Important scientific results were provided by the GNSS-A obser vation. In this decade, GNSS-A obser vation has detected seafloor movements due to the co- and post-seismic crustal deformation of the 2011 off the Pacific coast of Tohoku Earthquake, and the interseismic seafloor velocity along the Japan Trench, the Sagami Trough, and the Nankai Trough, including their temporal variations. These results provided essential information on interplate earthquakes. Decadal improvements of the GNSS-A technique and efficiency have enhanced the observation frequency. Observation accuracy was also improved by introducing a new analysis method where the spatial gradient components of the sound speed structure are estimated and corrected. Recently, we embarked on an effort to develop an “open” GNSS-A for the further development of GNSS-A community.Journal
Report of Hydrographic and Oceanographic ResearchesIssue/Article Nr
59Page Range
pp.95-114