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《科学通报(英文版)》 2002-19
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Determination of global mean sea surface WHU2000 using multi-satellite altimet-ric data

JIANG Weiping, LI Jiancheng & WANG ZhengtaoSchool of Geodesy and Geophysicals, Wuhan University, Wuhan 430079, China  
In this study, the overall editing criteria for altimetric data are considered and the geophysical correction models is improved. The datum for various altimetric data is also unified and the method of a full-combined crossover adjustment for different altimetric tracks is used to improve the radial orbits of Geosat, ERS-1 and ERS-2 data. In addition, the method for determining mean sea surface (MSS) by using multi-altimetric data is developed. The data used to compute WHU2000 MSS include 7-year Topex/Poseidon data (cycles 11-249), 2-year Geosat ERM data (cycles 1-44), 5-year ERS2 data (cycles 1-52) and all ERS-1 168-day data. The WHU2000 MSS is determined with a grid resolution of 2'×2' within the ± 82° latitude and its precision is better than 0.05 m. Comparing WHU 2000MSS with 3.75' × 3.75' CLS_SHOM98.2 MSS, 3'×3' GFZ MSS95A and 3.75'× 3.75' OSU MSS95, as external checks, the corresponding standard deviation (STD) of their differences is 0.090 m, 0.211 m and 0.079 m respectively.
【Fund】: This work was supported by the National Natural Science Foundation for Outstanding Young Scientists (Grant No. 49625408).
【CateGory Index】: P228
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【References】
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1 Han Jiancheng1) and Shen Wenbin1,2) 1)School of Geodesy and Geomatics,Wuhan University,Wuhan 430079 2)The Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan University, Wuhan 430079;SIMULATION TEST FOR DETERMINING 1°×1° GLOBAL GEOID WITH CENTIMETER-LEVEL ACCURACY[J];Journal of Geodesy and Geodynamics;2007-05
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