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dc.contributor.authorHwang, CWen_US
dc.contributor.authorWang, CGen_US
dc.contributor.authorLee, LHen_US
dc.date.accessioned2014-12-08T15:41:47Z-
dc.date.available2014-12-08T15:41:47Z-
dc.date.issued2002-11-01en_US
dc.identifier.issn0098-3004en_US
dc.identifier.urihttp://dx.doi.org/10.1016/S0098-3004(02)00005-5en_US
dc.identifier.urihttp://hdl.handle.net/11536/28412-
dc.description.abstractA program in FORTRAN 90 is developed which can adjust relative gravity measurements and solve for gravimeter parameters using the weighted constraint and datum-free constraint models. The weighted constraint model is chosen when there exist reliable a priori gravity values for use as supplementary data, or when it is required that a gravity network be attached to an existing gravity network of a higher order. The datum-free model uniquely determines relative gravity values among all stations without the need of a fixed gravity value, thus it is suitable for detecting relative gravity change. The optional solve-for gravimeter parameters include drift coefficients, and coefficients of the long wavelength and periodic components of calibration function. The program can also detect outliers in observations using the T-test method. A set of relative gravity data in Taiwan was used to test this program using five different choices of command-line arguments. The results show that there are no outliers in these data and that the estimated reading accuracy of the LaCoste and Romberg G meter (serial number 838) is about 0.02 mgal and the gravimeter drift rate is 0.9 mgal/month. The coefficients of the long wavelength and periodic components of calibration function are statistically equal to zero. The result from the datum-free solution is used to detect gravity variation due to the 1999 Chi-Chi earthquake, concluding that only one station experiences a significant change. (C) 2002 Elsevier Science Ltd. All rights reserved.en_US
dc.language.isoen_USen_US
dc.subjectrelative gravityen_US
dc.subjectweighted constrainten_US
dc.subjectdatum freeen_US
dc.subjectgravimeteren_US
dc.subjectChi-Chi earthquakeen_US
dc.subjectTaiwanen_US
dc.titleAdjustment of relative gravity measurements using weighted and datum-free constraintsen_US
dc.typeArticleen_US
dc.identifier.doi10.1016/S0098-3004(02)00005-5en_US
dc.identifier.journalCOMPUTERS & GEOSCIENCESen_US
dc.citation.volume28en_US
dc.citation.issue9en_US
dc.citation.spage1005en_US
dc.citation.epage1015en_US
dc.contributor.department土木工程學系zh_TW
dc.contributor.departmentDepartment of Civil Engineeringen_US
dc.identifier.wosnumberWOS:000178358900001-
dc.citation.woscount18-
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