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dc.contributor.authorGuo Jinyunen_US
dc.contributor.authorHwang Cheiwayen_US
dc.contributor.authorChang Xiaotaoen_US
dc.contributor.authorLiu Yutingen_US
dc.date.accessioned2014-12-08T15:16:18Z-
dc.date.available2014-12-08T15:16:18Z-
dc.date.issued2006-07-01en_US
dc.identifier.issn1002-0071en_US
dc.identifier.urihttp://dx.doi.org/10.1080/10020070612330061en_US
dc.identifier.urihttp://hdl.handle.net/11536/12091-
dc.description.abstractData quality is a key factor for the application of satellite altimetry to geodesy and oceanography. Accuracy of altimetry is limited in the coastal area because the altimeter waveforms are seriously contaminated by topography and environmental pollution. So waveform retracking is needed to compute the range correction of geophysical data records (GDRs) for better accuracy. In this paper, a new waveform retracker named the improved threshold retracker (ITR) is put forward. The retracker first builds sub-waveforms based on leading edges detected in a waveform, then determines the middle point of each leading edge to compute the retracking range correction, finally calculates the referenced sea surface heights according to the geoid undulation from a local geopotential model and tide heights from an ocean tide model, and compares it with all retracking ranges to determine the best one. As a test, altimeter waveforms of Geosat/GM are retracked around the Taiwan coastal area. The result shows that accuracy of ITR method is two times better than that of the beta-5-parameter function-fitting method and threshold method, and three times better than that of GDRs. ITR can efficiently improve the altimetry accuracy of the coastal sea area.en_US
dc.language.isoen_USen_US
dc.subjectsatellite altimetryen_US
dc.subjectwaveform retrackingen_US
dc.subjectimproved threshold retrackeren_US
dc.subjectsub-waveformen_US
dc.titleImproved threshold retracker for satellite altimeter waveform retracking over coastal seaen_US
dc.typeArticleen_US
dc.identifier.doi10.1080/10020070612330061en_US
dc.identifier.journalPROGRESS IN NATURAL SCIENCEen_US
dc.citation.volume16en_US
dc.citation.issue7en_US
dc.citation.spage732en_US
dc.citation.epage738en_US
dc.contributor.department土木工程學系zh_TW
dc.contributor.departmentDepartment of Civil Engineeringen_US
dc.identifier.wosnumberWOS:000239697500010-
dc.citation.woscount10-
Appears in Collections:Articles