GRACE-FO卫星星间指向定标与性能评估  

Inter-Satellite Pointing Calibration and Performance Evaluation of GRACE-FO Satellite

作　　者：黄志勇 李姗姗[1] 李世忠 黄令勇 朱雷鸣 谭勖立 潘星辰 牛晗晗 HUANG Zhiyong;LI Shanshan;LI Shizhong;HUANG Lingyong;ZHU Leiming;TAN Xuli;PAN Xingchen;NIU Hanhan(School of Surveying and Mapping,Information Engineering University,62 Kexue Road,Zhengzhou 450001,China;State Key Laboratory of Geo-Information Engineering,1 Mid-Yanta Road,Xi’an 710054,China)

机构地区：[1]信息工程大学地理空间信息学院,郑州市450001 [2]地理信息工程国家重点实验室,西安市710054

出　　处：《大地测量与地球动力学》2023年第9期881-886,共6页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(42174007,42204009)。

摘　　要：由于KBR相位中心、星敏感器安装矩阵在卫星入轨后可能发生变化,这将导致GRACE-FO卫星星间指向存在常偏。为了修正该常偏,需要对卫星姿轨控系统上注星间指向定标参数。推导星间指向定标和星间指向精度评估的相关算法,提出基于在轨路径的星间指向定标流程和实现策略,并基于地面路径对GRACE-FO卫星自发射以来的星间指向性能进行评估。星间指向角的标准差和RMS表明,GRACE-FO星间指向满足KBR正常工作所需的俯仰(pitch)和偏航(yaw)方向1 mrad、横滚(roll)方向10 mrad星间指向要求;卫星姿轨控系统的磁力矩器和姿控推力器能够配合完成姿控需求。Since the KBR phase center and the installation matrix of the star sensor may change after the satellites enter the orbit,there will be a systematic bias of the inter-satellite pointing of GRACE-FO satellite.In order to correct the bias,it is necessary to uplink the inter-satellite pointing calibration parameters into the satellite attitude and orbit control system.In this paper,we derive the correlative algorithms of inter-satellite pointing calibration and accuracy evaluation,and propose the process and implementation strategy of inter-satellite pointing calibration based on in-flight path.Based on the post-processing path,we evaluate the inter-satellite pointing performance of GRACE-FO since its launch.The STD and RMS of the inter-satellite pointing angle indicate that the GRACE-FO inter-satellite pointing meets the requirements of pitch and yaw direction 1 mrad and roll direction 10 mrad for the normal operation of KBR.The magnetic torque of the satellite attitude and orbit control system and the attitude control thruster can meet the requirements of attitude control.

关 键 词：星间指向 GRACE GRACE-FO 定标 姿控 

分 类 号：P228[天文地球—大地测量学与测量工程]