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《Computer Engineering and Applications》 2010-01
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Spacecrafts'position determination algorithm based on pulsar

WU Meng,LIU Jin,MA Jie,TIAN Jin-wen Institute for Pattern Recognition and Artificial Intelligence State Key Laboratory for Multi-spectral Information Processing Technologies,Huazhong University of Science and Technology,Wuhan 430074,China  
In order to improve precision of spacecrafts'position determination based on pulsar and reduce amounts of computation,a novel position determination algorithm based on pulsar is presented.In this method,3 pulsars are selected to generate the possible ambiguity points,and new pulsars are used to eliminate ambiguity points until pulse period number is unique.Then,clock drift is eliminated by TDOA location technology.Finally,the least-squares method improves location precision. The simulation results show that calculation time is less than 4 ms in a tested sphere with radius of 300 000 km,and the requirement for real-time rendering can be satisfied.Moreover,this algorithm has high precision.
【Fund】: 国家高技术研究发展计划(863)No.2006AAJ109;; 航空科学基金(No.20070818001)~~
【CateGory Index】: V448.2
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