{"_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": "\u003ctitle\u003eAbstract\u003c/title\u003eA 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 \u003cinline-formula\u003e\u003calternatives\u003e\u003ctex-math\u003e$$10^{-1}\\,\\text {Hz}$$\u003c/tex-math\u003e\u003cmml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"\u003e\n \u003cmml:mrow\u003e\n \u003cmml:msup\u003e\n \u003cmml:mn\u003e10\u003c/mml:mn\u003e\n \u003cmml:mrow\u003e\n \u003cmml:mo\u003e-\u003c/mml:mo\u003e\n \u003cmml:mn\u003e1\u003c/mml:mn\u003e\n \u003c/mml:mrow\u003e\n \u003c/mml:msup\u003e\n \u003cmml:mspace /\u003e\n \u003cmml:mtext\u003eHz\u003c/mml:mtext\u003e\n \u003c/mml:mrow\u003e\n \u003c/mml:math\u003e\u003c/alternatives\u003e\u003c/inline-formula\u003e 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"], "permalink_uri": "https://nied-repo.bosai.go.jp/records/4630", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2023-03-30"}, "publish_date": "2023-03-30", "publish_status": "0", "recid": "4630", "relation": {}, "relation_version_is_last": true, "title": ["Detection of hydroacoustic signals on a fiber-optic submarine cable"], "weko_shared_id": -1}