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Rectification of the heading and tilting of sediment trap arrays due to strong tidal currents in a submarine canyon
Author(s) -
Lee IHuan,
Liu James T.
Publication year - 2006
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2005gl025183
Subject(s) - heading (navigation) , geology , tilt (camera) , submarine canyon , canyon , submarine , geodesy , current (fluid) , oceanography , geomorphology , geometry , mathematics
Two taut‐line sediment trap moorings deployed in Kao‐ping Submarine Canyon were subjected to tidal flows, resulting in significant vertical movements and tilt of the mounted instruments. Based on simple trigonometric relations, the true heading and tilt angles were derived from the raw readings of heading, pitch, and roll of the two Nortek Aquadopp Doppler current meters (NADCM). The true tilt and heading angles of the NADCMs were highly correlated with depth and reflected the orientation of the axis of the canyon, respectively. The precluded data points of tilt and heading angles therefore can be reconstructed. Our study suggests a systematic way to rectify the heading and tilting of a sediment trap array of the mounted NADCM from raw readings of the heading, pitch and roll meters.