title: On-Ground Processing of Yaogan-24 Remote Sensing Satellite Attitude Data and Verification Using Geometric Field Calibration.
abstract: Satellite attitude accuracy is an important factor affecting the geometric processing accuracy of high-resolution optical satellite imagery. To address the problem whereby the accuracy of the Yaogan-24 remote sensing satellite's on-board attitude data processing is not high enough and thus cannot meet its image geometry processing requirements, we developed an approach involving on-ground attitude data processing and digital orthophoto (DOM) and the digital elevation model (DEM) verification of a geometric calibration field. The approach focuses on three modules: on-ground processing based on bidirectional filter, overall weighted smoothing and fitting, and evaluation in the geometric calibration field. Our experimental results demonstrate that the proposed on-ground processing method is both robust and feasible, which ensures the reliability of the observation data quality, convergence and stability of the parameter estimation model. In addition, both the Euler angle and quaternion could be used to build a mathematical fitting model, while the orthogonal polynomial fitting model is more suitable for modeling the attitude parameter. Furthermore, compared to the image geometric processing results based on on-board attitude data, the image uncontrolled and relative geometric positioning result accuracy can be increased by about 50%.
authors.affiliation: State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, 129 Luoyu Road, Wuhan 430079, China. wangmi@whu.edu.cn.
authors.forename: Mi
authors.initials: M
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, 129 Luoyu Road, Wuhan 430079, China. ccfan@whu.edu.cn.
authors.forename: Chengcheng
authors.initials: C
authors.lastname: Fan
authors.affiliation: Computer School, Wuhan University, 129 Luoyu Road, Wuhan 430079, China. 2009106190044@whu.edu.cn.|Collaborative Innovation Center of Geospatial Technology, Wuhan University, 129 Luoyu Road, Wuhan 430079, China. 2009106190044@whu.edu.cn.
authors.forename: Bo
authors.initials: B
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, 129 Luoyu Road, Wuhan 430079, China. jsy@whu.edu.cn.
authors.forename: Shuying
authors.initials: S
authors.lastname: Jin
authors.affiliation: State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, 129 Luoyu Road, Wuhan 430079, China. panjun1215@whu.edu.cn.
authors.forename: Jun
authors.initials: J
authors.lastname: Pan
keywords: Yaogan-24 remote sensing satellite; bidirectional filter; earth observation camera; gyroscope; precise attitude estimation; star sensor