지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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초록· 키워드
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The determination of the geoid in South Korea is a national imperative for the modernization of height datums, specifically the orthometric height and the dynamic height, that are used to monitor hydrological systems and environments with accuracy and easy revision, if necessary. The geometric heights above a reference ellipsoid, routinely obtained by GPS, lead immediately to vertical control with respect to the geoid for hydrological purposes if the geoid height above the ellipsoid is known accurately. The geoid height is determined from gravimetric data, traditionally ground data, but in recent times also from airborne data. This paper illustrates the basic concepts for combining these two types of data and gives a preliminary performance assessment of either set or their combination for the determination of the geoid in South Korea. It is shown that the most critical aspect of the combination is the gravitational effect of the topographic masses above the geoid, which, if not properly taken into account, introduces a significant bias of about 8 mgal in the gravity anomalies, and which can lead to geoid height bias errors of up to 10 cm. It is further confirmed and concluded that achieving better than 5 cm precision in geoid heights from gravimetry remains a challenge that can be surmounted only with the proper combination of terrestrial and airborne data, thus realizing higher data resolution over most of South Korea than currently available solely from the airborne data.
목차
Abstract
1. Introduction
2. Geoid Determination
3. Data Combination
4. Preliminary Data Analysis
5. Geoid Height Analyses
6. Conclusions
References
참고문헌 (21)
참고문헌 신청
1. [학술지(정기간행물)] - Bae, T. S. / 2012 / Update of the precision geoid determination in Korea / Geophysical Prospecting 60 : 555 ~ 571
2. [학술지(정기간행물)] - Bláha, T. / 1996 / Application of a spherical FFT approach in airborne gravimetry / Journal of Geodesy 70 : 663 ~ 672
3. [학술지(정기간행물)] - Farr, T. G. / 2007 / The Shuttle Radar Topography Mission / Rev. Geophys 45 : RG2004 ~
4. [학술지(정기간행물)] - Featherstone, W. E. / 2013 / Deterministic, stochastic, hybrid and band-limited modifications of Hotine’s integral / Journal of Geodesy 87 : 487 ~ 500
5. [단행본] - Forsberg, R. / 2010 / Airborne gravity field determination, In Sciences in Geodesy I, Advances and Future Directions / Springer-Verlag
2. [학술지(정기간행물)] - Bláha, T. / 1996 / Application of a spherical FFT approach in airborne gravimetry / Journal of Geodesy 70 : 663 ~ 672
3. [학술지(정기간행물)] - Farr, T. G. / 2007 / The Shuttle Radar Topography Mission / Rev. Geophys 45 : RG2004 ~
4. [학술지(정기간행물)] - Featherstone, W. E. / 2013 / Deterministic, stochastic, hybrid and band-limited modifications of Hotine’s integral / Journal of Geodesy 87 : 487 ~ 500
5. [단행본] - Forsberg, R. / 2010 / Airborne gravity field determination, In Sciences in Geodesy I, Advances and Future Directions / Springer-Verlag
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UCI(KEPA) : I410-ECN-0101-2015-530-001377342