中文摘要：

利用极大似然估计和3种互不相关的噪声（白噪声,闪烁噪声,游走噪声）模型及其组合,对SG-053超导重力仪产出的重力固体潮整时值残差时间序列进行分析,得出残差时间序列中明显存在彩色噪声（闪烁噪声、游走噪声）：白噪声1.40×10-8m s-2,闪烁噪声1.85×10-8m s-2,游走噪声为2.40×10-8m s-2。该方法估计的白噪声水平与潮汐分析方法得出的结果一致。

英文摘要：

The instrument noise level is one of the most important factor for the evaluation of SG-053.The tidal gravity residual time series of the SG-053 has been analyised with maximum likelihood estimation（MLE） and three noise（white noise,flicker noise,walk noise） models and their combination.It is shown that there is color noise in the tidal gravity residual,the white noise level is 1.40×10-8ms-2,the flicker noise 1.85×10-8ms-2 and the random walk noise 2.40×10-8 ms-2.This analysis result is consistent with the tidal analysis.