Improvement of the accuracy of the quasigeoid model VIGAC2017

Ha Minh Hoa
Author affiliations

Authors

  • Ha Minh Hoa Vietnam Institute of Geodesy and Cartography (VIGAC)

DOI:

https://doi.org/10.15625/0866-7187/40/1/10914

Keywords:

National spatial reference system, national quasigeoid height, least squares collocation, covariance matrix, semivariogram, semivariance function

Abstract

As mentioned in (Ha Minh Hoa, 2017), a national spatial reference system will be constructed based on a highly accurate national quasigeoid model with accuracy more than 4 cm. In Vietnam at the present stage there isn’t a detailed gravimetric measurement in mountainous regions and marine area. So with the purpose of improvement of accuracy of the national quasigeoid model VIGAC2017, we only can solve the task of fitting this model to national quasigeoid heights obtained from heights GPS/first, second orders levelling quasigeoid heights through least squares collocation.

This scientific article will introduce a first research result for improvement of accuracy of the quasigeoid model VIGAC2017 on the base of it’s fitting to 194 national quasigeoid heights by the least squares collocation. Research results show that accuracy of the quasigeoid model VIGAC2017 will be obtained at level of ±0.058 m and increased to 20.69 %.

References

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How to Cite

Hoa, H. M. (2018). Improvement of the accuracy of the quasigeoid model VIGAC2017. Vietnam Journal of Earth Sciences, 40(1), 39–46. https://doi.org/10.15625/0866-7187/40/1/10914

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