Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography (한국측량학회지)

Korean Society of Surveying, Geodesy, Photogrammetry and Cartography (한국측량학회)
권호 표지

Accuracy Analysis of New Geopotential Model using GPS/Levelling Data

GPS/Levelling데이터를 사용한 새로운 지구중력장모델의 정확도 분석

  • 윤홍식 (성균관대학교 토목환경공학과) ;
  • 조재명 (성균관대학교 토목환경공학과)
  • Published : 2005.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

The purpose of this paper is to evaluate a new geopotential model, EIGEN-CG01C which had been developed from CHAMP and GRACE mission observations and surface gravity data. The accuracy analysis was conducted by comparing the geoidal heights computed from two types of geopotential models (i.e., EIGEN-CG01C and EGM96) with spirit leveled GPS bench mark. To this end, three hundred twenty GPS leveled bench marks are used as bases for the numerical investigation. From the analysis, it was possible to conclude that EIGEN-CG01C was more suitable to upgrade the KGEOID 98 since the results that the EGM96 was slightly biased.

본 논문의 목적은 CHAMP, GRACE 데이터와 지표면 중력데이터를 이용하여 개발된 새로운 지오포텐셜 모델인 EIGEN-CC01C을 평가하는데 있다. 정확도 분석은 EIGEN-CG01C와 EGM96의 두 가지 지오포텐셜 모델로부터 계산된 각각의 지오이드고와 수준점에 대한 GPS 관측값으로부터 계산된 지오이드고를 비교하는 방식으로 수행하였으며, GPS 관측에 사용된 수준점은 총 320점이다. 본 연구결과, KGEOID98과 같은 정밀 지오이드를 개선하기 위한 기준면으로서는 편의가 적은 EIGEN-CG01C모델이 EGM96모델에 비하여 보다 더 적합한 것으로 나타났다.

Keywords

References

  1. 이석배 (2000),중력학적 방법 및 위성측지 방법에 의한 지오이드 모델링에 관한 연구,한국측량학회지,제18권,제4호 pp. 359-368
  2. 최재화,윤홍식,이석배 (1996),FFT에 의한 한반도 일원에서의 중력 지오이드 결정, 한국측량학회지,제14권,제l호,pp 49-58
  3. 최재화 (1998),GPS/Levelling을 이용한 지오이드 평가에 관한연구, 국토지리정보원
  4. C. Forste, F. Flechtner, R. Schmidt, U. Meyer, R. Stubenvoll, F. Barthelmes, R. Konig, K. H. Neumayer, M. Rothacher, Ch. Reigber, R. Biancale, S. Bruinsma, J. M. Lemoine, and J. C. Raimondo (2005), A New High Resolution Global Gravity Field Model Derived From Combination of GRACE and CHAMP Mission and Altimetry/Gravimetry Surface Gravity Data, EGU General Assembly 2005, Vienna, Austria
  5. Georgia Fotopoulos, Christopher Kotsakis, and Michael G. Sideirs (2003), How Accurately Can We Determine Orthometric Height Differences from GPS and Geoid Data, Journal of Surveying Engineering, Vol. 129, No. 1, pp. 1-10 https://doi.org/10.1061/(ASCE)0733-9453(2003)129:1(1)
  6. Hong-Sic Yun (1999), Precision geoid determination by spherical FFT in and around the Korean penunsula, Earth Planets Space 51, pp. 13-18 https://doi.org/10.1186/BF03352204
  7. Hong-Sic Yun (2002), Evaluation of Ultra-high and High Degree Geopotential Models for Improving the KGEOID98, Korean Journal of Geomatics, Vol. 2, No. 1, pp. 7-15
  8. Kandiah Jeyapalan (2004), Local Geoid Determination Using Global Positioning Systems, Surveying and Land Information Science, Vol. 64, No. 1, pp. 65-75
  9. M. Biker(2005), Evaluation of the new global gravity field models from CHAMP and GRACE with GPS-levelling data in Fennoscandia, XXII Geofysiikan Paivat, Geophysical Society of Finland, pp. 21-26
  10. Reigber Ch, P. Schwintzer, R. Stubenvoll, R. Schmidt, F. Flechtner, U. Meyer, R. Konig, H. Neumayer, Ch. Forste, F. Barthelmes, S.Y. Zhu, G. Balmino, R. Biancale, J. M. Lemoine, H. Meixner, and J.C. Raimondo (2004), A High Resolution Global Gravity Field Model Combining CHAMP and GRACE Satellite Mission and Surface Gravity Data: EIGEN-CG01C, Joint CHAMP/GRACE Science Meeting, GFZ
  11. W. E. Featherstone (2002), Expected Contributions of Dedicated Satellite Gravity Field Missions to Regional Geoid Determination with some Examples from Australia, Journal of Geospatial Engineering, Vol. 4, No. 1, pp. 1-19
  12. Wolfgang Torge (1989), Gravimetry, Walter de Gruyter, pp. 42-45