中文摘要：

由于卫星重力梯度技术能够有效补偿重力场信号随卫星高度增加快速衰减的影响, 因此GOCE卫星的发射使得利用重力梯度测量数据恢复高精度重力场模型成为可能.以轨道摄动理论为基础,利用时域最小二乘法,分析重力梯度卫星的轨道高度、轨道倾角、卫星寿命（数据长度）、重力梯度测量精度以及数据采样频率等对其恢复地球重力场误差的影响.结果表明：时域最小二乘法适合于卫星重力梯度测量的误差分析和方案设计.

英文摘要：

Since the attenuation of the gravitaty field with altitude increasing can be sufficiently compensated by satellite gravity gradiometry, it is possible to recover earth＇ s gravity field with higher precision. On the basis of the satellite orbit perturbation theory, the error of gravity field model from satellite gravity gradiometry mission is analyzed with the time-wise least square method. And the effects of gravity field on the accuracy are presented in maps, due to the choice of SGG parameters （ such as satellite＇ s altitude, sampling rates, inclination of satellite and accuracy of gradiometery）. The results indicate that time domain least-square method is suitable for the error analy- sis and the mission design of the measurement of satellite gravity gradiometery.