Gravimetric geoid modelling over peninsular Malaysia using two different gridding approaches for combining free air anomaly
We investigate the use of the KTH Method to compute gravimetric geoid models of Malaysian Peninsular and the effect of two differing strategies to combine and interpolate terrestrial, marine DTU17 free air gravity anomaly data at regular grid nodes. Gravimetric geoid models were produced for both fr...
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my.utm.910852021-05-31T13:21:27Z http://eprints.utm.my/id/eprint/91085/ Gravimetric geoid modelling over peninsular Malaysia using two different gridding approaches for combining free air anomaly Pa'suya, M. F. Din, A. H. M. HT101-395 Sociology, Urban We investigate the use of the KTH Method to compute gravimetric geoid models of Malaysian Peninsular and the effect of two differing strategies to combine and interpolate terrestrial, marine DTU17 free air gravity anomaly data at regular grid nodes. Gravimetric geoid models were produced for both free air anomaly grids using the GOCE-only geopotential model GGM GO-CONS-GCF-2-SPW-R4 as the long wavelength reference signal and high-resolution TanDEM-X global digital terrain model. The geoid models were analyzed to assess how the different gridding strategies impact the gravimetric geoid over Malaysian Peninsular by comparing themto 172 GNSS-levelling derived geoid undulations. The RMSE of the two sets of gravimetric geoid model / GNSS-levelling residuals differed by approx. 26.2 mm. When a 4-parameter fit is used, the difference between the RMSE of the residuals reduced to 8 mm. The geoid models shown here do not include the latest airborne gravity data used in the computation of the official gravimetric geoid for the Malaysian Peninsular, for this reason they are not as precise. 2019 Conference or Workshop Item PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/91085/1/MuhammadFaizPa%27suya2019_GravimetricGeoidModelling.pdf Pa'suya, M. F. and Din, A. H. M. (2019) Gravimetric geoid modelling over peninsular Malaysia using two different gridding approaches for combining free air anomaly. In: 6th International Conference on Geomatics and Geospatial Technology, GGT 2019, 1-3 Oct 2019, Kuala Lumpur, Malaysia. http://www.dx.doi.org/10.5194/isprs-archives-XLII-4-W16-515-2019 |
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HT101-395 Sociology, Urban Pa'suya, M. F. Din, A. H. M. Gravimetric geoid modelling over peninsular Malaysia using two different gridding approaches for combining free air anomaly |
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We investigate the use of the KTH Method to compute gravimetric geoid models of Malaysian Peninsular and the effect of two differing strategies to combine and interpolate terrestrial, marine DTU17 free air gravity anomaly data at regular grid nodes. Gravimetric geoid models were produced for both free air anomaly grids using the GOCE-only geopotential model GGM GO-CONS-GCF-2-SPW-R4 as the long wavelength reference signal and high-resolution TanDEM-X global digital terrain model. The geoid models were analyzed to assess how the different gridding strategies impact the gravimetric geoid over Malaysian Peninsular by comparing themto 172 GNSS-levelling derived geoid undulations. The RMSE of the two sets of gravimetric geoid model / GNSS-levelling residuals differed by approx. 26.2 mm. When a 4-parameter fit is used, the difference between the RMSE of the residuals reduced to 8 mm. The geoid models shown here do not include the latest airborne gravity data used in the computation of the official gravimetric geoid for the Malaysian Peninsular, for this reason they are not as precise. |
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Conference or Workshop Item |
author |
Pa'suya, M. F. Din, A. H. M. |
author_facet |
Pa'suya, M. F. Din, A. H. M. |
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Pa'suya, M. F. |
title |
Gravimetric geoid modelling over peninsular Malaysia using two different gridding approaches for combining free air anomaly |
title_short |
Gravimetric geoid modelling over peninsular Malaysia using two different gridding approaches for combining free air anomaly |
title_full |
Gravimetric geoid modelling over peninsular Malaysia using two different gridding approaches for combining free air anomaly |
title_fullStr |
Gravimetric geoid modelling over peninsular Malaysia using two different gridding approaches for combining free air anomaly |
title_full_unstemmed |
Gravimetric geoid modelling over peninsular Malaysia using two different gridding approaches for combining free air anomaly |
title_sort |
gravimetric geoid modelling over peninsular malaysia using two different gridding approaches for combining free air anomaly |
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2019 |
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http://eprints.utm.my/id/eprint/91085/1/MuhammadFaizPa%27suya2019_GravimetricGeoidModelling.pdf http://eprints.utm.my/id/eprint/91085/ http://www.dx.doi.org/10.5194/isprs-archives-XLII-4-W16-515-2019 |
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