One-minute interval good-quality gravity and magnetic data were prepared for most of the Hakurei-maru cruises carried out by Geological Survey of Japan from 1974 to 1999. The RMS COD (root mean square crossover difference) of all the magnetic data after leveling correction is 26.1 nT, while that of all the gravity data after altimetry and leveling corrections is 3.2 mGal. These data can create a magnetic anomaly map without false lineations along survey lines and a free air gravity anomaly map, which has better quality than a map created using satellite altimetry data.
Three types of data files were released as an open-file report of Geological Survey of Japan, no. 714: a master data file, which has corrected navigation data and observed data, a gravity and depth data file and a magnetic data file, which include data after gravity and magnetic anomaly calculation.
"},{"@language":"ja","@value":"地質調査所による1974年から1999年の地質調査船白嶺丸のほとんどの航海に対して１分間隔の均質なデータを整備した．GPSが一般的になる前は，船舶の位置データの精度が悪いため測線間の交点誤差が大きく，広範囲の磁気図・重力図の作成は困難だった．こうしたデータが多く含まれる白嶺丸の重力・全磁力データに対して，フィルターや衛星データの活用も含む各種補正により，測線に沿う不自然な異常のない磁気異常データ，アルチメトリによるものよりノイズの少ないフリーエア異常データを作成し，公開した．全航海に対するレベリング補正後の磁気異常データの二乗平均平方根交点誤差（RMS COD；root mean square crossover difference）は26.1 nT，アルチメトリ補正・レベリング補正後のフリーエア異常データのRMS CODは3.2 mGalである．測位データ補正後の観測値のみのマスターデータファイル，重力異常を計算した重力・測深データファイル，磁気異常を計算した磁力データファイルの3種類のデータを地質調査総合センター研究資料集No.714として公開した．
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Japan"},{"@value":"地調研報"}],"dc:publisher":[{"@language":"en","@value":"National Institute of Advanced Industrial Science and Technology, Geological Survey of Japan"},{"@language":"ja","@value":"国立研究開発法人 産業技術総合研究所 地質調査総合センター"}],"prism:publicationDate":"2021-11-02","prism:volume":"72","prism:number":"5","prism:startingPage":"421","prism:endingPage":"445"},"reviewed":"false","url":[{"@id":"http://id.ndl.go.jp/bib/031965597"},{"@id":"https://ndlsearch.ndl.go.jp/books/R000000004-I031965597"},{"@id":"https://www.jstage.jst.go.jp/article/bullgsj/72/5/72_421/_pdf"}],"availableAt":"2021-11-02","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=Hakurei-maru","dc:title":"Hakurei-maru"},{"@id":"https://cir.nii.ac.jp/all?q=marine%20geophysical%20survey","dc:title":"marine geophysical survey"},{"@id":"https://cir.nii.ac.jp/all?q=gravity%20anomaly","dc:title":"gravity anomaly"},{"@id":"https://cir.nii.ac.jp/all?q=magnetic%20anomaly","dc:title":"magnetic anomaly"},{"@id":"https://cir.nii.ac.jp/all?q=low-pass%20filter","dc:title":"low-pass filter"},{"@id":"https://cir.nii.ac.jp/all?q=data%20release","dc:title":"data release"}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360011142940570112","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"A New Method of Interpolation and Smooth Curve Fitting Based on Local Procedures"}]},{"@id":"https://cir.nii.ac.jp/crid/1360574092885689472","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"New global marine gravity model from CryoSat-2 and Jason-1 reveals buried tectonic structure"}]},{"@id":"https://cir.nii.ac.jp/crid/1360574092886026112","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Generic Mapping Tools: Improved Version Released"}]},{"@id":"https://cir.nii.ac.jp/crid/1361699995201539200","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"LaCoste and Romberg straight-line gravity meter"}]},{"@id":"https://cir.nii.ac.jp/crid/1361981468960476800","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"The Lacoste & Romberg Air/Sea Gravity Meter"}]},{"@id":"https://cir.nii.ac.jp/crid/1362544419954927488","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Airborne gravimetry; an investigation of filtering"}]},{"@id":"https://cir.nii.ac.jp/crid/1362825895702246912","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Geodetic Reference System 1980"}]},{"@id":"https://cir.nii.ac.jp/crid/1363107370394903936","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Extending comprehensive models of the Earth's magnetic field with Ørsted and CHAMP data"}]},{"@id":"https://cir.nii.ac.jp/crid/1363388843459056896","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Time Series Analysis and Inverse Theory for Geophysicists"}]},{"@id":"https://cir.nii.ac.jp/crid/1364233268827325568","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Eotvos corrections for a moving gravity meter"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206512011904","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Evidence for geomagnetic jerks in comprehensive models"}]},{"@id":"https://cir.nii.ac.jp/crid/1390574732433952384","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"第2 白嶺丸重力データの整備・公開"},{"@language":"en","@value":"Preparation and release of gravity data collected by R/V Hakurei-maru No.2."},{"@language":"ja-Kana","@value":"ダイ2 ハクレイマル ジュウリョク データ ノ セイビ ・ コウカイ"}]},{"@id":"https://cir.nii.ac.jp/crid/2051714792046952576","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"A new leveling method without the direct use of crossover data and its application in marine magnetic surveys : weighted spatial averaging and temporal filtering"}]}],"dataSourceIdentifier":[{"@type":"JALC","@value":"oai:japanlinkcenter.org:2009009681"},{"@type":"NDL_SEARCH","@value":"oai:ndlsearch.ndl.go.jp:R000000004-I031965597"},{"@type":"CROSSREF","@value":"10.9795/bullgsj.72.421"},{"@type":"CIA","@value":"130008124683"},{"@type":"CROSSREF","@value":"10.9795/bullgsj.73.2_29_references_DOI_Xfbl4f2htP0xGgemXuZzwloQvg0"}]}