加速度计移植误差来源及对重力场建模影响分析  

Analysis of source of accelerometer transplant error and its influence on gravity field modeling

作　　者：王康 李耀宗[1,2,3] 肖云 周浩[1,2,3] 周泽兵 罗志才[1,2,3] WANG Kang;LI Yaozong;XIAO Yun;ZHOU Hao;ZHOU Zebing;LUO Zhicai(Gravity Center,School of Physics,Huazhong University of Science and Technology,Wuhan 430074,China;National Key Science and Technology Infrastructure for Precision Gravity Measurement,Huazhong University of Science and Technology,Wuhan 430074,China;Institute of Geophysics,School of Physics,Huazhong University of Science and Technology,Wuhan 430074,China;Institute of Surveying and Mapping,Xi,an 710054,China)

机构地区：[1]华中科技大学物理学院引力中心,湖北武汉430074 [2]华中科技大学精密重力测量国家重大科技基础设施,湖北武汉430074 [3]华中科技大学物理学院地球物理研究所,湖北武汉430074 [4]西安测绘研究所,陕西西安710054

出　　处：《华中科技大学学报（自然科学版）》2023年第3期72-77,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(41931074,42074018,42061134007)。

摘　　要：星载加速度计是低低卫星跟踪卫星技术探测地球重力场的核心载荷,由于加速度计载荷设计复杂且精细度要求高,GRACE和GRACE Follow-On等低低卫星跟踪卫星均存在仅有单加速度计工作的情况,为保障重力卫星任务顺利实施,须要在单加速度计观测条件下完成数据移植工作,现阶段尚无关于加速度计移植算法误差来源的研究.这里详细分析了移植算法的噪声来源,并评估了移植误差对重力场建模精度的影响.结果表明:移植误差主要来源于双星重复飞行的位置差异、姿态差异、时间延迟和卫星自身参数误差;当移植误差小于1×10^(-9)m/s2时,地球重力场的反演精度与双加速度计同时工作时的反演精度差异较小,对应需求为双星重复飞行的位置差异小于1000 m、姿态差异小于1°.The on-board accelerometer is the core load for low-to-low satellite tracking satellite technology to detect the earth’s gravity field.Due to complex design of accelerometer load and high precision requirement,low-to-low satellite tracking satellites such as GRACE and GRACE Follow-On have only single accelerometer working.In order to ensure the smooth implementation of the gravity satellite mission,it is necessary to complete the data transfer work under the condition of single accelerometer observation.At present,there is no research on the error source of the accelerometer transfer algorithm.The noise source of the transfer algorithm is analyzed in detail,and the influence of the transfer error on the gravity field modeling accuracy is evaluated.The results show that the transplant errors mainly come from the position difference,attitude difference,time delay and satellite parameters error of the double star repeated flight.When the transplant error is less than 1×10-9m/s~2,the inversion accuracy of the earth’s gravity field is less different from that of the dual-accelerometer working at the same time,and the corresponding requirement is that the position difference of the double-star repeated flight is less than 1000 m and the attitude difference is less than 1°.

关 键 词：星载加速度计 移植算法 地球重力场 低低卫星跟踪卫星 卫星重力 

分 类 号：P223[天文地球—大地测量学与测量工程]