A Study on the Navigation and Communication Satellite System for the Next Generation

Kenichi Inarniya

Abstract:	lhe concept described here belongs to categoty of Global Navigation Satellite System (GNSS) for the next genemtion, and tie subjects are to pumue a constellation accompanying a better Geometric Dilution of Precision (GDOP) and the method of achieving it The point paid attention when to build the aimed constellation is anon-linear chamcteristic of a staying time of a ground trace at various latitudes of an Inclined Geostationmy Orbit (IGEO). A simple combination of the orbits constmcting a constellation for the navigation system may cause an imbalance satellite distribution per a unit area on the ground surf&e at various latitude locations. A new attempt to cancel the imbalances through a combination of various inclinations of IGEO is studied and the way to accomplish it is explained by sequential steps. The method here is called Balanced Footprint Method ( BFM ). The system performances in the middle stages of BFM are monitomd and evaluated in the peculiar charts created for tis study. According to the BFM process, many runs had been performed to find the optimal results. Finally, the best five cases of the global coverage of the constellations consisting of 15 and 18 satellites have been demonsbated here with remarkably improved result of the uniform of the ground distribution of the satellites compared to the earlier constellations. The advantages of the this satellite system other than the BFM constellations could contribute in realizhg synergy of the three major functions of Communication, Navigation and Surveillance ( CNS ) within a system in the aviation fiel~ due to the close connection of the all satellites and the Ground Control Stations (GCS) through the intematellite communication links and the fkeder links. They have been already studied in the authol’s previous papers.
Published in:	Proceedings of the 11th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1998) September 15 - 18, 1998 Nashville, TN
Pages:	1131 - 1140
Cite this article:	Inarniya, Kenichi, "A Study on the Navigation and Communication Satellite System for the Next Generation," Proceedings of the 11th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1998), Nashville, TN, September 1998, pp. 1131-1140.
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