GRACE加速仪资料定标研究  

The calibration research for GRACE accelerometer

作　　者：熊永清[1,2] 汪宏波[1,2] 许晓丽[1,3] 赵长印[1,2] 

机构地区：[1]中国科学院紫金山天文台,南京210008 [2]中国科学院空间目标与碎片观测重点实验室,南京210008 [3]中国科学院研究生院,北京100049

出　　处：《中国科学：物理学、力学、天文学》2011年第11期1319-1327,共9页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金资助项目(批准号:10773033)

摘　　要：该文给出了GRACE卫星星载加速仪资料的一种快速校标方法,以单天GRACE卫星快速轨道直接校标加速仪的结果为基础,联合多个单天法方程进行二次校标,其中多天只解算1组共同的尺度因子,而线性偏差每个单天解算1组,以求消弱尺度因子和线性偏差的相关性,得到更加稳定的结果.同时还利用GRACE的A/B双星共轨的特点,进行了两星阻力测量资料之间的对比验证,证实了结果的有效性.A calibration method for GRACE accelerometer is developed in this paper. Based on single-day results, which calibrate the GRACE accelerometer using rapid GRACE orbits, recalibration is performed through combination of several days normal equations, a common group of scales are solved for this days, but different group of biases are solved for every day, so the correlation between scales and biases are weakened, the calibration results become more stable. At last, the calibration results are validated by comparision of the acceleration of GRACE A/B, can help to improve the atmospheric density models.

关 键 词：GRACE 协方差 星载加速仪 校标 

分 类 号：V441[航空宇航科学与技术—飞行器设计]