{"created":"2023-03-31T01:58:57.553261+00:00","id":4630,"links":{},"metadata":{"_buckets":{"deposit":"fcebde92-c08b-4770-a3d1-41af49c54da0"},"_deposit":{"id":"4630","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"4630"},"status":"published"},"_oai":{"id":"oai:nied-repo.bosai.go.jp:00004630","sets":[]},"author_link":[],"item_10001_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2021-12","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"1","bibliographicVolumeNumber":"11","bibliographic_titles":[{"bibliographic_title":"Scientific Reports","bibliographic_titleLang":"en"}]}]},"item_10001_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"<title>Abstract</title>A ship-based seismic survey was conducted close to a fiber-optic submarine cable, and 50 km-long distributed acoustic sensing (DAS) recordings with air-gun shots were obtained for the first time. We examine the acquired DAS dataset together with the co-located hydrophones to investigate the detection capability of underwater acoustic (hydroacoustic) signals. Here, we show the hydroacoustic signals identified by the DAS measurement characterizing in frequency-time space. The DAS measurement can be sensitive for hydroacoustic signals in a frequency range from <inline-formula><alternatives><tex-math>$$10^{-1}\\,\\text {Hz}$$</tex-math><mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\n <mml:mrow>\n <mml:msup>\n <mml:mn>10</mml:mn>\n <mml:mrow>\n <mml:mo>-</mml:mo>\n <mml:mn>1</mml:mn>\n </mml:mrow>\n </mml:msup>\n <mml:mspace />\n <mml:mtext>Hz</mml:mtext>\n </mml:mrow>\n </mml:math></alternatives></inline-formula> to a few tens of Hz which is similar to the hydrophones. The observed phases of hydroacoustic signals are coherent within a few kilometers along the submarine cable, suggesting the DAS is suitable for applying correlation analysis using hydroacoustic signals. Although our study suggests that virtual sensor’s self-noise of the present DAS measurement is relatively high compared to the conventional in-situ hydroacoustic sensors above a few Hz, the DAS identifies the ocean microseismic background noise along the entire submarine cable except for some cable sections de-coupled from the seafloor.","subitem_description_language":"en","subitem_description_type":"Other"}]},"item_10001_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"Springer Science and Business Media LLC","subitem_publisher_language":"en"}]},"item_10001_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"10.1038/s41598-021-82093-8"}}]},"item_10001_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"2045-2322","subitem_source_identifier_type":"EISSN"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Hiroyuki Matsumoto","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Eiichiro Araki","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Toshinori Kimura","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Gou Fujie","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Kazuya Shiraishi","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Takashi Tonegawa","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Koichiro Obana","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Ryuta Arai","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Yuka Kaiho","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Yasuyuki Nakamura","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Takashi Yokobiki","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Shuichi Kodaira","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Narumi Takahashi","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Robert Ellwood","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Victor Yartsev","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Martin Karrenbach","creatorNameLang":"en"}]}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_title":"Detection of hydroacoustic signals on a fiber-optic submarine cable","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Detection of hydroacoustic signals on a fiber-optic submarine cable","subitem_title_language":"en"}]},"item_type_id":"40001","owner":"1","path":["1670839190650"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2023-03-30"},"publish_date":"2023-03-30","publish_status":"0","recid":"4630","relation_version_is_last":true,"title":["Detection of hydroacoustic signals on a fiber-optic submarine cable"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-06-08T06:06:51.032935+00:00"}