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Research on Visibility of LEO Satellites

Author: TangRongFu
Tutor: YiDongYun
School: National University of Defense Science and Technology
Course: Journal of Systems Science
Keywords: LEO satellite Visibility Visual ball crown Fast algorithm
CLC: TP391.9
Type: Master's thesis
Year: 2007
Downloads: 125
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Abstract


Satellite visibility visible period of the satellite ground terminal and the a visible whole story moment . The satellite visibility satellite system design, performance evaluation , space mission planning and military simulation and so important . The current satellites in orbit, the satellite orbit height can be divided into LEO satellites , MEO satellite , GEO satellites , HEO satellites . Thesis to conduct in-depth research and establish visibility fast algorithm LEO satellite visibility . Research LEO satellite visibility fast algorithm for improving simulation efficiency , especially in the event-driven and time - step real-time simulation environment has a very important significance . First, the paper introduces some basic concepts and knowledge of the two-body movement , and then create a circular orbit LEO satellite ground terminal visibility algorithm - orbit cross - round compensation algorithm ( the shift the orbit intersects in circle compensation SOICC ) . In the algorithm design , the paper presents the concept of \Visible spherical cap is an important theoretical basis of the algorithm , the extended application of the algorithm can also play a very important role as a bridge . The algorithm makes use of the large arc approximate the nadir track within the visible window visibility results . The simulation results show that the algorithm of visible whole story SOICC time absolute error of about 0.92 seconds . Second, the paper elliptical orbit LEO satellite ground terminal visibility algorithm - the true anomaly iterative compensation algorithm ( true anomaly iteration the compensation , TAIC) . TAIC algorithm is the main idea of the SOICC Algorithm extended to the algorithm established in the elliptical orbit case . TAIC algorithm biggest advantage is that the true anomaly instead of time as the main processing object , thus avoiding the numerical methods for solving the transcendental equation : Kepler equation algorithm to calculate the amount is very small . Simulation results show that the visibility of the whole story of TAIC algorithm absolute timing error is approximately 0.79 seconds . Again , through the establishment of a reasonable model , the paper will expand applications in LEO satellite observations fixed ground point target problem relay Stars link with customers Stars , problems TAIC algorithm , and the simulation results . TAIC algorithm extended application also made a corresponding discussion . Finally , the paper summarizes and discusses further research directions .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Computer simulation
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