Determination of Coverage Oscillation for Inclined Communication Satellite

Year 2020, Volume: 24 Issue: 5, 973 - 983, 01.10.2020

İbrahim Öz , Ümit Cezmi Yılmaz

https://doi.org/10.16984/saufenbilder.702190

Cited By: 8

Abstract

The communication engineers need to evaluate footprint movement to deploy a ground station. Geostationary communication satellite’s inclination angle causes the movement of a satellite footprint. The calculation of the inclination angle requires complex astronomical knowledge and mathematical calculations. On the other hand, a satellite communication engineer does not need a very accurate inclination angle value to design a ground station for required service availability. We propose a practical method called trigonometric curve fitting for the inclination to solve the problem. The past and the future value of inclination can be evaluated by using the curve-fitting method. It is a simplified practical method and does not need advanced orbital dynamics knowledge. The orbit geometry and evaluated inclination angle are used for estimation of a coverage area movement. A satellite communication engineer can evaluate coverage area oscillation quickly and design a better link for an inclined orbit satellite by using the proposed method. We have evaluated the inclination angle of the communication satellite Sat-1 with the proposed method. Sat-1 spot beam movements and wide beam coverage area movements are estimated to obtain EIRP and G/T fluctuation for link budget purposes. The proposed method provides the results that are consistent with the results of measurements and the results of satellite operators’ professional tools.

Keywords

coverage oscillation, geo satellite, communication, inclination, curve fitting

Thanks

We would like to thank Turksat Uydu Haberlesme ve Kablo TV AS for its invaluable support.

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