- Open Access
Effects of gravity data quality and spacing on the accuracy of the geoid in South Korea
Earth, Planets and Space volume 61, pages 927–932 (2009)
The effects of gravity data quality and spacing on the accuracy of the computed geoid are analyzed. The analysis is performed using simulated gravity data that accommodate the real gravity signal in South Korea. The reference geoid is generated using both simulated gravity data and digital terrain models (DTM), assuming that both data sets are errorless. By artificially controlling the gravity data quality and spacing, we are able to calculate and analyze the geoid errors. The results show that the current distribution of real gravity data in South Korea causes geoid errors, with the standard deviation being as much as 8 cm, and that these geoid errors are mainly caused by the distribution of gravity data rather than by the noise in the data. Areas showing large geoid errors are also clearly identified; these areas should be subjected to supplementary gravity surveying at data spacing smaller than 2 km to achieve a 5-cm level of geoid accuracy.
Hwang, C. and L. Hwang, Use of geoid for assessing trigonometric height accuracy and detecting vertical land motion, J. Surv. Eng., 128(1), 1–20, 2002.
Jekeli, C., Statistical analysis of moving-base gravimetry and gravity gradiometry, OSU Report No. 466, Department of Civil and Environmental Engineering and Geodetic Science, The Ohio State University, 2003.
Kotsakis, C. and M. G. Sideris, Study of the gravity field spectrum in Canada in view of cm-geoid determination, Joint Meeting of the International Gravity Commission and the International Geoid Commission No2, Trieste, ITALIE (07/09/1998) 1999, 40(3–4), 451 p., (10 ref.), 179–188, 1999.
Lee, J. S., B. M. Lee, J. H. Kwon, and Y. W. Lee, Free-air anomaly from a consistent preprocessing of land gravity data in South Korea, Korean J. Geomatics, 26(4), 379–386, 2008.
Lee, S. B., A study on the Geoid Modeling by Gravimetric Methods and Methods of Satellite Geodesy, J. Korean Soc. Geodyn., Photogramm. Cartogr., 18(4), 359–367, 2000.
Lee, S. B., H. S. Yun, and J. H. Choi, Gravimetric geoid determination by Fast Fourier Transform in and around Korean peninsula, J. Korea Soc. Geodyn., Photogramm. Cartogra., 14(1), 49–58, 1996.
Marzooqu, Y. A., H. Fashir, S. I. Ahmed, R. Forsberg, and G. Strykowski, Progress Towards a cm Geoid for Dubai Emirate, FIG Working Week 2005 and GSDI-8, Cairo, Egypt, 16–21 April 2005, 2005.
Toth, G. Y., S. Z. Rozsa, V. D. Andritsanos, J. Adam, and I. N. Tziavos, Towards a cm-geoid for Hungary: recent efforts and results, Phys. Chem. Earth Part A, 25(1), 47–52, 2000.
Tscherning, C. C., R. Forsberg, and P. Knudsen, The GRAVSOFT package for geoid determination, ContinentalWorkshop on the Geoid in Europe, May 1992, 327–334, Research Institute of Geodesy, Topography and Cartography, Prague, 1992.
Yun, H. S., Results of the geoid computation for Korean peninsula, Ph.D. dissertation, Technical University of Budapest, Hungary, 1995.
Yun, H. S., Precision geoid determination by spherical FFT in and around the Korean peninsula, Earth Planets Space, 51(1), 13–18, 1999.
About this article
Cite this article
Hong, CK., Kwon, J.H., Lee, B.M. et al. Effects of gravity data quality and spacing on the accuracy of the geoid in South Korea. Earth Planet Sp 61, 927–932 (2009). https://doi.org/10.1186/BF03353204
- Gravity data quality and spacing
- digital terrain model
- precision geoid determination