High-Precision Attitude Post-Processing and Initial Verification for the ZY-3 Satellite

	High-Precision Attitude Post-Processing and Initial Verification for the ZY-3 Satellite
	Tang, Xinming 1; Xie, Junfeng 1; Wang, Xiao 1; Jiang, Wanshou 1
刊名	REMOTE SENSING
	2015
卷号	7 期号:1 页码:195-210
关键词	attitude accuracy star tracker/gyro post-processing geometric accuracy
通讯作者	Xie, JF (reprint author), NASG, Satellite Surveying & Mapping Applicat Ctr, 28 Lianhuachi West Rd, Beijing 100830, Peoples R China.
英文摘要	Attitude data, which is the important data strongly correlated with the geometric accuracy of optical remote sensing satellite images, are generally obtained using a real-time Extended Kalman Filter (EKF) with star-tracker and gyro data for current high-resolution satellites, such as Orb-view, IKONOS, Quickbird, Pleiades, and ZY-3. We propose a forward-backward Unscented Kalman Filter (UKF) for post-processing, and the proposed method employs UKF to suppress noise by using an unscented transformation (UT) rather than an EKF in a nonlinear attitude system. Moreover, this method makes full use of the collected data in the fixed-interval and computational resources on the ground, and it determines optimal attitude results by forward-backward filtering and weighted smoothing with the raw star-tracker and gyro data collected for a fixed period. In this study, the principle and implementation of the proposed method are described. The post-processed attitude was compared with the on-board attitude, and the absolute accuracy was evaluated by the two methods. One method compares the positioning accuracy of the object space coordinates with the post-processed and on-board attitude data without using ground control points (GCPs). The other method compares the tie-point residuals of the image coordinates after a free net adjustment. In addition, the internal and external parameters of the camera were accurately calibrated before use for an objective evaluation of the attitude accuracy. The experimental results reveal that the accuracy of the post-processed attitude is superior to the accuracy of the on-board processed attitude. This method has been applied to the ZiYuan-3 satellite system for processing the raw star-tracker and gyro data daily.
研究领域[WOS]	Remote Sensing
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000348401900006
内容类型	期刊论文
源URL	[http://ir.ceode.ac.cn/handle/183411/38523]
专题	遥感与数字地球研究所_SCI/EI期刊论文_期刊论文
作者单位	1.[Tang, Xinming 2.Xie, Junfeng] NASG, Satellite Surveying & Mapping Applicat Ctr, Beijing 100830, Peoples R China 3.[Tang, Xinming] Jiangsu Ctr Collaborat Innovat Geog Informat Reso, Nanjing 210023, Jiangsu, Peoples R China 4.[Wang, Xiao] Chinese Acad Sci, Inst Remote Sensing & Digital Earth, Beijing 100101, Peoples R China 5.[Wang, Xiao] Beijing UniStrong Sci & Technol Co Ltd, Beijing 100015, Peoples R China 6.[Jiang, Wanshou] Wuhan Univ, State Key Lab Informat Engn Surveying Mapping & R, Wuhan 430079, Peoples R China
推荐引用方式 GB/T 7714	Tang, Xinming,Xie, Junfeng,Wang, Xiao,et al. High-Precision Attitude Post-Processing and Initial Verification for the ZY-3 Satellite[J]. REMOTE SENSING,2015,7(1):195-210.
APA	Tang, Xinming,Xie, Junfeng,Wang, Xiao,&Jiang, Wanshou.(2015).High-Precision Attitude Post-Processing and Initial Verification for the ZY-3 Satellite.REMOTE SENSING,7(1),195-210.
MLA	Tang, Xinming,et al."High-Precision Attitude Post-Processing and Initial Verification for the ZY-3 Satellite".REMOTE SENSING 7.1(2015):195-210.