Underwater LF wave propagation study for positioning

Hiroshi Yoshida, Ryotaro Suga, Koichi Uesaka, Masaharu Takahashi, Nozomu Ishii, Qiang Chen, Naomichi Fuji, Hiroyasu Sato

研究成果: Conference contribution

3 被引用数 (Scopus)

抄録

In 1998, JAMSTEC started the development project of the first prototype of a long-range cruising AUV (LCAUV) to evaluate fundamental technologies needed to travel through under the ice covered area of the Arctic. In 2005, The LCAUV, Urashima, achieved 317 km continuous cruising powered by a deep sea fuel cell developed in JAMSTEC [1]. We then moved to next stage and have conducted to design the second prototype LCAUV with target range of over 3,000 km. It included improvement of power source, communication system, and positioning system. In 2010 a small high efficiency multi-less (HEML) fuel cell was completed [2] and a long range acoustic communication system achieved 1,000 km communication using time-reversal waves. But we had not developed practical positioning system for under the ice by 2010. In past years the dramatic melting of Arctic ice would be driving extreme weather. This is very serious problem, but it is still poorly understood. Scientists need more research to understand it. We have thus a plan to develop an Arctic research platform that especially performs observations under the ice. Now we are conducting a research of a new positioning method with communication availability before developing the platform or an AUV. The proposed method is based on low frequency electromagnetic waves which can propagate inside of ice and sea water. A prototype to evaluate the method is like GPS repeater. The repeater to be set on the ice receives GPS signal, transmitting radio waves into the sea water via the ice up to several tens meters deep. To realize the system feasibility we started developing underwater antennas and measuring wave propagation in the sea ice and the sea water in 2016.

本文言語English
ホスト出版物のタイトルOCEANS 2017 - Aberdeen
出版社Institute of Electrical and Electronics Engineers Inc.
ページ1-5
ページ数5
ISBN(電子版)9781509052783
DOI
出版ステータスPublished - 2017 10 25
外部発表はい
イベントOCEANS 2017 - Aberdeen - Aberdeen, United Kingdom
継続期間: 2017 6 192017 6 22

出版物シリーズ

名前OCEANS 2017 - Aberdeen
2017-October

Other

OtherOCEANS 2017 - Aberdeen
CountryUnited Kingdom
CityAberdeen
Period17/6/1917/6/22

ASJC Scopus subject areas

  • Instrumentation
  • Computer Networks and Communications
  • Oceanography
  • Acoustics and Ultrasonics
  • Automotive Engineering

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