JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Redefinition of the Original Benchmark Height using Long-term Tide Observations Analysis and GPS Levelling Methods
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Redefinition of the Original Benchmark Height using Long-term Tide Observations Analysis and GPS Levelling Methods
Jung, Tae-Jun; Yoon, Hong-Sic; Hwang, Jin-Sang; Lee, Dong-Ha;
  PDF(new window)
 Abstract
In this study, we suggested the period of tide observations is proper to calculate the mean sea level(MSL) precisely on Incheon tide station using wavelet analysis, and newly determined then the vertical reference surface of Korea using the calculated MSL. In order to calculate the height difference between the calculated MSL and specific ground station (ICGP) near the Incheon tide stations, we performed the laser measurements directly to the sea surface where located below ICGP. The orthometric-height of ICGP was determined that corrected the height difference to the calculated MSL using linear interpolation method. Finally, we connected the orthometric-height of ICGP with the original benchmark (ORBM) using GPS leveling methods for determining the new orthometric-height of ORBM. As the results, there is a variation amount of 0.026m between the new MSL was calculated in this study and old MSL was calculated in 1910`s. Also, there is a difference of 0.035m between the new and old orthometric-heights of ORBM. The connection (or leveling) error of 0.009m was revealed in new orthometric height of ORBM with consideration of MSL variation which may caused by the error of GPS ellipsoid height and/or geoid model. In this study, we could be determined precisely the orthometric-height of ORBM based on the new MSL of Incheon Bay using only GPS leveling method, not a spirit leveling method. Therefore, it is necessary to determine the vertical datum strictly using long-term and continuously tide observations more than 19 years and to use the GPS leveling method widely in the height leveling work for the effective changeover from the orthonormal to the orthometric in national height system.
 Keywords
Vertical Datum;Mean Sea level;Original Benchmark;Wavelet Analysis;Precise GPS Positioning;Geoid Model;
 Language
Korean
 Cited by
 References
1.
국립지리원 (1983), 우리나라 정밀수준망에 관한 연구, pp. 87-89.

2.
국립지리원 (2003), 측량 및 지형공간정보 백서, pp. 186-187.

3.
이동하 (2008), 한국의 고정밀 합성지오이드 모델 개발, 박사학위논문, 성균관대학교.

4.
정태준, 윤홍식, 이동하, 황학, 김용현 (2009), 조석자료와 EGM2008 중력장모델을 이용한 새로운 수직기준 결정에 관한 연구, 제35회 대한토목학회 정기학술대회 논문집, 대한토목학회, pp. 1641-1644.

5.
최병호 (1994), 우리나라 국토 높이의 기준, 대한토목학회지, 대한토목학회, Vol. 42, No. 3, pp. 84-89.

6.
황학, 윤홍식, 이동하 (2008), GRACE 및 SLR 자료를 이용한 C20DML 시계열 변화 연구, 한국측량학회지, 한국측량학회, 제26권 제5호, PP. 513-518.

7.
NGS (1986), Geodetic Glossary, Publication of the National Geodetic Survey, NOAA/NOS, National Geodetic Information Center, Rockville, MD.

8.
Pavlis, N.K., Holmes, S.A., Kenyon, S.C., and Factor, J.K. (2008), An Earth Gravitational Model to Degree 2160:EGM2008, presented at the 2008 General Assembly of the European Geoscience Union, Vienna, Austria, pp.13-18.

9.
Smith A (1999), Application of Satellite Altimetry for Global Ocean Tide Modelling, Ph.D. Thesis, Delft University Press, The Netherlands.

10.
Torrence, c., and Compo, G. P. (1988), A Pracical Guide to Wavelet Analysis, Bulletin of the American Meteorological Society, Vol. 79, No. 1, pp. 61-78.

11.
Torrence, C., and P. Webster (1999), Interdecadal changes in the ENSO-monsoon system, J. Climate, Vol. 12, pp. 2679-2690. crossref(new window)