中文摘要：

利用不同重力场模型（EGM2008和EGM96）和不同海面高模型（CLS01、DNSC08、WHU2009和CNES_CLS10）,分别确定无潮汐和平均潮汐系统下的全球平均海面位常数,通过海面地形改正后,平均位常数分别为62 636 858.333 3 m2s-2和62 636 858.260 6 m2s-2,计算结果与EGM2008使用的水准椭球正常位相差小于1.40m2s-2,反算求解海面地形平均值表明结果正确可靠。

英文摘要：

The geoidal geopotential W0 was determined on the basis of global gravity model（EGM2008 and EGM96） and global mean sea surface height model（CLS01,DNSC08,WHU2009 and CNES_CLS10）.If the sea surface topography correction was applied to the surface height,the geoidal geopotential values 62 636 858.333 3 m2s-2 and 62 636 858.260 6 m2s-2 were derived with a difference less than 1.40 m2s-2 compared to the normal level ellipsoid geopotential within free tide and mean tide system respectively.The mean sea surface topography computed based on this W0 shows that the results are reliable.