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dc.contributor.authorHwang, Cheinwayen_US
dc.contributor.authorShih, Hsuan-Changen_US
dc.contributor.authorHsiao, Yu-Shenen_US
dc.contributor.authorHuang, Chi-Hsunen_US
dc.date.accessioned2014-12-08T15:24:28Z-
dc.date.available2014-12-08T15:24:28Z-
dc.date.issued2012en_US
dc.identifier.issn0149-0419en_US
dc.identifier.urihttp://hdl.handle.net/11536/16982-
dc.identifier.urihttp://dx.doi.org/10.1080/01490419.2011.634962en_US
dc.description.abstractWe compare the accuracies of GPS and gravity observations obtained from three airborne gravity surveys over Taiwan Island at altitude 5000 m and over Kuroshio Current, Taiwan Strait, and Dongsha Atoll at altitude 1500 m. A kinematic network adjustment was used to determine the positions of the aircrafts. GPS positioning errors are at the decimeter-level, which are not entirely propagated to velocity and acceleration errors due to cancellation of long wavelength errors. Outliers are downweighted in the Gaussian filtering to improve the gravity accuracy, especially at altitude 1500 m. Compared with the upward-continued gravity, the gravity anomalies from the 1500-m surveys show a consistent accuracy of about 3 mgal; the accuracy from the 5000-m survey is degraded, especially over high mountains. The RMS crossover differences at 1500 m and 5000 m are all below 3 mgal, suggesting flight altitudes do not affect the crossover difference. Coherence analysis suggests that the spatial resolvable wavelengths of the airborne gravity range from 4 km (altitude 1500 m) to 6 km (altitude 5000 m).en_US
dc.language.isoen_USen_US
dc.subjectAirborne gravityen_US
dc.subjectDongsha Atollen_US
dc.subjectfilteren_US
dc.subjectKuroshio Currenten_US
dc.subjectTaiwanen_US
dc.titleAirborne Gravity Surveys Over Taiwan Island and Strait, Kuroshio Current and South China Sea: Comparison of GPS and Gravity Accuracies at Different Flight Altitudesen_US
dc.typeArticleen_US
dc.identifier.doi10.1080/01490419.2011.634962en_US
dc.identifier.journalMARINE GEODESYen_US
dc.citation.volume35en_US
dc.citation.issue3en_US
dc.citation.spage287en_US
dc.citation.epage305en_US
dc.contributor.department土木工程學系zh_TW
dc.contributor.departmentDepartment of Civil Engineeringen_US
dc.identifier.wosnumberWOS:000308128300006-
dc.citation.woscount2-
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