| GRACE加速仪资料定标研究 |
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| 引用本文： | 熊永清,汪宏波,许晓丽,赵长印.GRACE加速仪资料定标研究[J].中国科学:物理学 力学 天文学,2011(11):1319-1327. |
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| 作者姓名： | 熊永清 汪宏波 许晓丽 赵长印 |
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| 作者单位： | [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 |
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| 基金项目： | 国家自然科学基金资助项目（批准号：10773033） |
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| 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.
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| 关 键 词： | GRACE 协方差 星载加速仪 校标 |
The calibration research for GRACE accelerometer |
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| XIONG YongQingl＇,WANG HongBo,＇,XU XiaoLi,＇,. ＆ ZHAO ChangYin.The calibration research for GRACE accelerometer[J].Scientia Sinica Pysica,Mechanica & Astronomica,2011(11):1319-1327. |
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| Authors: | XIONG YongQingl＇ WANG HongBo ＇ XU XiaoLi ＇ ＆ ZHAO ChangYin |
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| Institution: | 1＇2 Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China, 2 Key Laboratory of Space Object and Debris Observation, Nanjing 210008, China; 3 Graduate School of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | 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. |
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| Keywords: | GRACE covariance accelerometer calibration |
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