NDLI: Offline outlier identification for dynamic measurements in underwater geomagnetism navigation

Content Provider	IEEE Xplore Digital Library
Author	Yi Lin Lei Yan Yuefeng Liu Qingxi Tong
Copyright Year	2008
Description	Author affiliation: Beijing Key Lab. of Spatial Info. Integration&Its Applic., Peking Univ., Beijing (Yi Lin; Lei Yan; Yuefeng Liu)
Abstract	Underwater geomagnetism-aided navigation now is advanced as a leading subject in navigation research field, for its merits of sensing-passivity, distribution-extensity and etc. But yet geomagnetic fieldpsilas unsteadiness may cause positioning resultspsila divergence after correlation matching, so the dynamic measurementspsila gross errors make this project an issue. After analyzing the specialties of underwater vehiclespsila slow sailing and marine magnetometerspsila quick sampling, this paper deduces that real-surveyed total intensity sequence can be considered as nonstationary stochastic process. Based on the procedure of inertial navigation system (INS) rectified by matching algorithm intermittently, combination outlier identification algorithm in offline mode (COIO) is advanced. COIO includes segmentation fault-tolerant gross-error identification method (SFTGI) for the sections before matching sequencepsilas end point and wavelet multiscale analysis method for checking the dubious outliers picked out above. Then one-step prediction judgment (OSPJ) is assumed for end point. Then comparison with Least Square (LS) algorithms and simulation experiments show that, outliers can be detected from dynamic surveying sequence more effectively by COIO. The divergence problem of correlation matching algorithmpsilas result can be avoided, and the efficiency of INSpsilas rectification also can be improved.
Starting Page	5009
Ending Page	5013
File Size	330687
Page Count	5
File Format	PDF
ISBN	9781424421138
DOI	10.1109/WCICA.2008.4593740
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-06-25
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Navigation Algorithm design and analysis Fitting Correlation Sea measurements Wavelet analysis Prediction algorithms underwater Geomagnetism navigation outlier offline identification
Content Type	Text
Resource Type	Article

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