A new seafloor electromagneic station with an Overhauser magnetometer, a magnetotelluric variograph and an acoustic telemetry modem

• Toh Hiroaki

  Ocean Research Institute, University of Tokyo

• Goto Tadanori

  Department of Environmental Earth Sciences, Aichi University of Education

• Hamano Yozo

  Institute of Earth and Planetary Physics, Graduate School of University of Tokyo

書誌事項

タイトル別名

• A new seafloor electromagnetic station with an Overhauser magnetometer, a magnetotelluric variograph and an acoustic telemetry modem
• new seafloor electromagneic station with an Overhauser magnetometer a magnetotelluric variograph and an acoustic telemetry modem

抄録

A new type of Sea Floor Electro Magnetic Station (SFEMS) has been newly developed by adding a magnetotelluric (MT) variograph to its prototype built previously (Toh and Hamano, 1997). New SFEMS is able to conduct long-term electromagnetic (EM) observations at the seafloor, which is one of the principal goals of the Ocean Hemisphere Project (OHP). Long-term seafloor EM observations enable us to probe into the deep Earth (both the mantle and the core) by improving the spatial coverage of the existing EM observation network. The SFEMS has been tested in three sea experiments to yield 3 components of the geomagnetic field, 2 horizontal components of the geoelectric field and 2 components of tilts in addition to the absolute geomagnetic total force. The SFEMS is designed for measuring these EM signals at the seafloor continuously for as long as 2 yrs. The SFEMS mainly consists of the following three parts: (1) An Overhauser proton precession magnetometer for the absolute measurements of the geomagnetic total force with a possible bias of less than 10 nT. (2) An MT variograph that measures the rest of the EM components and tilt. (3) An Acoustic Telemetry Modem (ATM) that allows us to control/monitor the seafloor instrument as well as data transmission at the maximum rate of 1200 baud. Construction of seafloor EM observatories in regions where significant EM data have never been collected is now quite feasible by development of the SFEMS.

収録刊行物

• Ｅａｒｔｈ，　Ｐｌａｎｅｔｓ　ａｎｄ　Ｓｐａｃｅ

  Ｅａｒｔｈ，　Ｐｌａｎｅｔｓ　ａｎｄ　Ｓｐａｃｅ 50 (11-12), 895-903, 1998

  地球電磁気・地球惑星圏学会 、公益社団法人 日本地震学会、特定非営利活動法人 日本火山学会、日本測地学会、日本惑星科学会

キーワード

• Space and Planetary Science
• Geology

詳細情報

• CRID: 1390001206509134976
• NII論文ID: 10003736396
• NII論文ID: 130003955891
• NII書誌ID: AA11211921
• DOI: 10.1186/bf03352185
• ISSN: 18805981
• ISSN: 13438832
• ISSN: http://id.crossref.org/issn/13438832
• NDL書誌ID: 1951561
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I1951561
• Web Site: https://link.springer.com/content/pdf/10.1186/BF03352185.pdf
• Web Site: https://link.springer.com/article/10.1186/BF03352185/fulltext.html
• Web Site: http://link.springer.com/content/pdf/10.1186/BF03352185
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可