重力卫星加速度计数据预处理研究  

Research on preprocessing of gravity satellite accelerometer data

作　　者：潘宗鹏 肖云[1,2,3] 刘晓刚 明锋[1,2,3] PAN ZongPeng;XIAO Yun;LIU XiaoGang;MING Feng(Xi'an Research Institute of Surveying and Mapping,Xi'an 710054,China;State Key Laboratory of Geo-Information Engineering,Xi'an 710054,China;Key Laboratory of Smart Earth,Beijing 100029,China)

机构地区：[1]西安测绘研究所,西安710054 [2]地理信息工程国家重点实验室,西安710054 [3]智慧地球重点实验室,北京100029

出　　处：《地球物理学报》2024年第10期3697-3706,共10页Chinese Journal of Geophysics

基　　金：国家重点研发计划(2021YFB3900604);自然科学基金青年科学基金项目(42404008);自然科学基金面上项目(42074006,42471042)资助。

摘　　要：静电悬浮加速度计主要用于测量重力卫星质心处受到的非保守力,是重力卫星的核心载荷,卫星平台和环境中的各类干扰均会对加速度计测量产生影响.本文重点研究了GRACE Follow-On卫星加速度计ACC1A原始数据的预处理方法,给出了加速度计数据预处理详细流程,重点分析了卫星平台和环境中各类干扰引起加速度计数据异常的量级和处理方法(包括姿控推力器推力偏差、磁力矩器干扰、温控开关、阻尼震荡等引起的异常影响).基于加速度计ACC1A原始数据生成ACT1A产品和ACT1B产品,并与JPL发布相应产品进行比较.结果表明,ACT1A产品的三轴线加速度残差中误差优于10^(-17)m·s^(-2),残差幅度谱密度优于10^(-18)m·s^(-2)/(Hz)^(1/2),ACT1B产品的三轴线加速度残差中误差优于10^(-11)m·s^(-2),残差幅度谱密度优于10^(-12)m·s^(-2)/(Hz)^(1/2),均低于加速度计测量精度10^(-10)m·s^(-2),生成的产品可以用于后续重力场反演.The capacitive accelerometer is mainly used to measure the non-conservative force at the center of mass of gravity satellites, which is the core payload of gravity satellites. Various disturbances in the satellite platform and environment can affect the accelerometer measurement. This paper focuses on the preprocessing method of the original level-1A accelerometer data of the GRACE Follow-On satellites, gives the preprocessing steps of accelerometer data, and focuses on analyzing the magnitude and processing methods of accelerometer data anomalies caused by various types of interference in the satellite platform and environment (including peaks and spikes caused by attitude control thruster deviation, magnetic torque interference, switching of heating system, damping oscillation, etc.). ACT1A products and ACT1B products are generated based on ACC1A data and compared with the corresponding products released by JPL. The results show that the standard deviation in the three-axis acceleration residual of ACT1A data is better than 10-17m·s^(-2), the acceleration residual amplitude spectral density is better than 10^(-18)m·s^(-2)/(Hz)1/2. The standard deviation in the three-axis acceleration residual of ACT1B data is better than 10-11m·s^(-2), and the acceleration residual amplitude spectral density is better than 10-12m·s^(-2)/(Hz)1/2. The precision of the generated ACT1A and ACT1B data is better than the accelerometer accuracy of 10-10m·s^(-2), and the ACT1B data can be used for gravity field inversion.

关 键 词：重力卫星 GRACE Follow-On 加速度计 数据预处理 

分 类 号：P228[天文地球—大地测量学与测量工程]