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International Journal of Antennas and Propagation
Volume 2014, Article ID 903026, 12 pages
http://dx.doi.org/10.1155/2014/903026
Research Article

Orbit Propagation and Determination of Low Earth Orbit Satellites

Department of Aviation & Communication Electronics, Air Force Institute of Technology, No. 198 Jieshou W. Road, Gangshan, Kaohsiung 820, Taiwan

Received 5 January 2014; Accepted 28 January 2014; Published 8 May 2014

Academic Editor: Chung-Liang Chang

Copyright © 2014 Ho-Nien Shou. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper represents orbit propagation and determination of low Earth orbit (LEO) satellites. Satellite global positioning system (GPS) configured receiver provides position and velocity measures by navigating filter to get the coordinates of the orbit propagation (OP). The main contradictions in real-time orbit which is determined by the problem are orbit positioning accuracy and the amount of calculating two indicators. This paper is dedicated to solving the problem of tradeoffs. To plan to use a nonlinear filtering method for immediate orbit tasks requires more precise satellite orbit state parameters in a short time. Although the traditional extended Kalman filter (EKF) method is widely used, its linear approximation of the drawbacks in dealing with nonlinear problems was especially evident, without compromising Kalman filter (unscented Kalman Filter, UKF). As a new nonlinear estimation method, it is measured at the estimated measurements on more and more applications. This paper will be the first study on UKF microsatellites in LEO orbit in real time, trying to explore the real-time precision orbit determination techniques. Through the preliminary simulation results, they show that, based on orbit mission requirements and conditions using UKF, they can satisfy the positioning accuracy and compute two indicators.