Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/64832
DC Field | Value | Language |
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dc.contributor | Department of Land Surveying and Geo-Informatics | - |
dc.creator | Wu, Y | - |
dc.creator | Luo, Z | - |
dc.creator | Chen, W | - |
dc.creator | Chen, Y | - |
dc.date.accessioned | 2017-04-06T04:37:54Z | - |
dc.date.available | 2017-04-06T04:37:54Z | - |
dc.identifier.issn | 1343-8832 (print) | en_US |
dc.identifier.uri | http://hdl.handle.net/10397/64832 | - |
dc.language.iso | en | en_US |
dc.publisher | Springer | en_US |
dc.rights | © The Author(s) 2017. | en_US |
dc.rights | This article is distributed under the terms of the Creative Commons Attribution 4.0 International License(http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. | en_US |
dc.rights | This article Wu, Y., Luo, Z., Chen, W., & Chen, Y. (2017). High-resolution regional gravity field recovery from Poisson wavelets using heterogeneous observational techniques. Earth, Planets and Space, 69(1), 34 is available at https://doi.org/10.1186/s40623-017-0618-2 | en_US |
dc.subject | GPS/leveling data | en_US |
dc.subject | Poisson wavelets | en_US |
dc.subject | Quasi-geoid/geoid | en_US |
dc.subject | Regional gravity field recovery | en_US |
dc.subject | Tikhonov regularization | en_US |
dc.title | High-resolution regional gravity field recovery from Poisson wavelets using heterogeneous observational techniques | en_US |
dc.type | Journal/Magazine Article | en_US |
dc.identifier.volume | 69 | en_US |
dc.identifier.issue | 1 | en_US |
dc.identifier.doi | 10.1186/s40623-017-0618-2 | en_US |
dcterms.abstract | We adopt Poisson wavelets for regional gravity field recovery using data acquired from various observational techniques; the method combines data of different spatial resolutions and coverage, and various spectral contents and noise levels. For managing the ill-conditioned system, the performances of the zero- and first-order Tikhonov regularization approaches are investigated. Moreover, a direct approach is proposed to properly combine Global Positioning System (GPS)/leveling data with the gravimetric quasi-geoid/geoid, where GPS/leveling data are treated as an additional observation group to form a new functional model. In this manner, the quasi-geoid/geoid that fits the local leveling system can be computed in one step, and no post-processing (e.g., corrector surface or least squares collocation) procedures are needed. As a case study, we model a new reference surface over Hong Kong. The results show solutions with first-order regularization are better than those obtained from zero-order regularization, which indicates the former may be more preferable for regional gravity field modeling. The numerical results also demonstrate the gravimetric quasi-geoid/geoid and GPS/leveling data can be combined properly using this direct approach, where no systematic errors exist between these two data sets. A comparison with 61 independent GPS/leveling points shows the accuracy of the new geoid, HKGEOID-2016, is around 1.1 cm. Further evaluation demonstrates the new geoid has improved significantly compared to the original model, HKGEOID-2000, and the standard deviation for the differences between the observed and computed geoidal heights at all GPS/leveling points is reduced from 2.4 to 0.6 cm. Finally, we conclude HKGEOID-2016 can be substituted for HKGEOID-2000 for engineering purposes and geophysical investigations in Hong Kong. [Figure not available: see fulltext.] | - |
dcterms.accessRights | open access | en_US |
dcterms.bibliographicCitation | Earth, planets and space, 2017, v. 69, no. 1, 34 | - |
dcterms.isPartOf | Earth, planets and space | - |
dcterms.issued | 2017 | - |
dc.identifier.isi | WOS:000395982400001 | - |
dc.identifier.scopus | 2-s2.0-85013741990 | - |
dc.identifier.ros | 2016004113 | - |
dc.identifier.eissn | 1880-5981 | en_US |
dc.identifier.artn | 34 | en_US |
dc.identifier.rosgroupid | 2016004034 | - |
dc.description.ros | 2016-2017 > Academic research: refereed > Publication in refereed journal | - |
dc.description.validate | 201804_a bcma | - |
dc.description.oa | Version of Record | en_US |
dc.identifier.FolderNumber | OA_IR/PIRA | en_US |
dc.description.pubStatus | Published | en_US |
Appears in Collections: | Journal/Magazine Article |
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File | Description | Size | Format | |
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Wu_high_resolution_regional.pdf | 4.71 MB | Adobe PDF | View/Open |
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