文章基本信息

标题：Precise Orbit Determination Based on the Unscented Transform for Optical Observations
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作者：Hyewon Hwang ; Eunji Lee ; Sang-Young Park 等
期刊名称：Journal of Astronomy and Space Sciences
印刷版ISSN：2093-5587
电子版ISSN：2093-1409
出版年度：2019
卷号：36
期号：4
页码：249-264
DOI：10.5140/JASS.2019.36.4.249
语种：English
出版社：Korean Space Science Society
摘要：In this study, the precise orbit determination (POD) software is developed for optical observation. To improve the performance of the estimation algorithm, a nonlinear batch filter, based on the unscented transform (UT) that overcomes the disadvantages of the least-squares (LS) batch filter, is utilized. The LS and UT batch filter algorithms are verified through numerical simulation analysis using artificial optical measurements. We use the real optical observation data of a low Earth orbit (LEO) satellite, Cryosat-2, observed from optical wide-field patrol network (OWL-Net), to verify the performance of the POD software developed. The effects of light travel time, annual aberration, and diurnal aberration are considered as error models to correct OWL-Net data. As a result of POD, measurement residual and estimated state vector of the LS batch filter converge to the local minimum when the initial orbit error is large or the initial covariance matrix is smaller than the initial error level. However, UT batch filter converges to the global minimum, irrespective of the initial orbit error and the initial covariance matrix.
关键词：orbit determination;batch filter;unscented transform;OWL-Net;Cryosat-2