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中文摘要：
本文首先给出了用星间速度恢复地球重力场的数学模型，然后用GRACE卫星30天的星间速度观测值计算了一个100阶的地球重力场模型DQM2006S2。为了对这一模型的精度进行评述，将它与EGM96，EIGEN—CHAMP03S和GGM01S3个地球重力场模型作了比较，并用这一模型计算了高程异常与GPS／水准实际观测值进行了比较，结果表明：DQM2006S2模型精度优于EGM96和EIGEN—CHAMP03S模型精度，但是不及GGM01S模型精度。精度不及GGM01S的原因是GGM01S模型使用了111天的星间速度数据，其数据量约为DOM2006S2模型使用数据量的4倍。
英文摘要：
The mathematic model of recovering the earth gravity field is presented. Then a Earth gravity field model, named DQM 2006S2, is determined by one month observations of inter-satellite range-rate. In order to evaluate the accuracy of the new model, it is compared with famous model EGM 96, EIGEN-CHAMP03S and GGM01C. Fur- ther more, the height anomaly calculated by the new model is compared with the one observed by GPS/Leveling. The results indicate that the accuracy of DQM 2006S2 is better than the one of EGM 96 and EIGEN-CHAMP03S, but poorer than the one of GGM01S. The reason is that 111 days＇ data have been used by GGM01S, which always being 4 times of the one used in DQM 2006S2.
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