CHAMP姿态数据间断的处理方法与精度分析

PROCESSING METHOD OF CHAMP ATTITUDE DATA GAP AND ACCURACY ANALYSIS

为探究CHAMP加速度计数据的预处理方法,分析了姿态数据间断的各种情况,提出了采用二次插值方法处理姿态数据间断,并用实测的CHAMP加速度计数据进行了验证。统计结果表明采用二次插值方法处理姿态数据间断,精度比线性插值法明显提高,当姿态数据连续间断小于40个历元的情况下,内插姿态数据对加速度的影响小于10-9ms-2,不影响其使用。

For searching th gap has been analyzed, then the e preprocessing method of CHAMP accelerometry data,the variation of attitude data method of quadratic interpolation was used for processing statistical results from observed CHAMP accelerometry data show that the accuracy by higher than that than 10^-9ms^-2, linear interpolation; the influences of interpolated attitude data to the attitude data gap. The quadratic interpolation is served acceleration is less ich can satisfy the requirement of accuracy in case of data gap less than 40 epochs.