Centimeter-level positioning on the seafloor
スポンサーリンク
概要
- 論文の詳細を見る
This paper reports the activity in the development of the observation system of seafloor crustal deformation for understanding mechanism of interplate earthquakes at subduction plate boundaries around Japan. Currently, the method for the seafloor geodesy is under development in order to overcome several difficulties. The position of the sea-bottom transponders at the vicinity of the Nankai trough and the Japan Trench is observed using a GPS/Acoustic measurement system. Early results from processed data show a scatter of 4cm standard deviation for repeated horizontal positioning from drifting survey vessel. This paper describes two techniques developed to realize precise acoustic ranging, automatically detecting and correcting the Doppler-shift of acoustic propagation signal due to ships drifting and attitude motion, and theoretically forming a pulse of one wavelength in cross correlation between transmission and reception of long-coded signals.
- 日本学士院の論文
著者
-
Yabuki Tetsuichiro
Hydrographic And Oceanographic Department Japan Coast Guard
-
Asada Akira
Institute Of Industrial Science The University Of Tokyo
-
Asada Akira
Instilute Of Industrial Science University Of Tokyo
-
ASADA Akira
Institute of Industrial Science, the University of Tokyo
-
YABUKI Tetsuichiro
Hydrographic Department, Japan Coast Guard
関連論文
- Noncontact power supply for seafloor geodetic observing robot system
- Undersea co-seismic crustal movements associated with the 2005 Off Miyagi Prefecture Earthquake detected by GPS/acoustic seafloor geodetic observation
- GPS/Acoustic seafloor geodetic observation : method of data analysis and its application
- Automated acoustic method for counting and sizing farmed fish during transfer using DIDSON
- New USB-based 3D digital echo sounder system for mapping and assessing fish and aquatic plants
- Weak interplate coupling beneath the subduction zone off Fukushima, NE Japan, inferred from GPS/acoustic seafloor geodetic observation
- Centimeter-level positioning on the seafloor
- Synthetic aperture technique applied to a multi-beam echo sounder
- Assessing the biomass and distribution of submerged aquatic vegetation using multibeam echo sounding in Lake Towada, Japan
- Undersea co-seismic crustal movements associated with the 2005 Off Miyagi Prefecture Earthquake detected by GPS/acoustic seafloor geodetic observation
- GPS/Acoustic seafloor geodetic observation: method of data analysis and its application