中文摘要：

利用新的海潮模型（NAO99B）更为合理的共线方法和交叠平差技术，有效改善了ERM数据的径向轨道误差和时变海面高的影响，提高了浅海海域测高数据的测高精度。

英文摘要：

On the basis of multi-altimeter data, new valid collinear and crossover adjust method are used to reduce radial orbital error and the time variations of sea surface level; the new NAO99B oceanic tide model is also used to improve the precision of the data. The high resolution and high precision mean sea surface model（WHIGG C） is computed in China Sea and its vicinity, and is compared with CLS01 ,GSFC00 and KMS001 sea surface height model.