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Determination of global mean sea surface WHU2000 using multi-satellite altimetric data 被引量:9

Determination of global mean sea surface WHU2000 using multi-satellite altimet-ric data
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摘要 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. 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.
机构地区 Wuhan Univ
出处 《Chinese Science Bulletin》 SCIE EI CAS 2002年第19期1664-1668,共5页
基金 This work was supported bythe National Natural Science Foundation for Outstanding Young Scientists (Grant No. 49625408).
关键词 ALTIMETRY mean SEA surface CROSSOVER adjustment. altimetry, mean sea surface, crossover adjustment.
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  • 1J. Li. A formula for computing the gravity disturbance from the second radial derivative of the disturbing potential[J] 2002,Journal of Geodesy(4):226~231

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