Double-Layered Inclined Orbit Constellation for Advanced Satellite Communications Network (Special Issue on Advances in Satellite Communications toward Multimedia Era)
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概要
- 論文の詳細を見る
The link properties of a double-layered constellation composed of inclined orbits for an advanced global satellite communications network connected by optical inter-satellite links (ISLs) have been evaluated. The constellation consists of lower layer satellites for mobile and personal satellite communications, and upper layer satellites for large-capacity fixed satellite communications and feeder links. Optical inter-satellite links, which can perform high-capacity communications with small terminals, are used for all inter-satellite data transmission. Although a satellite constellation using polar orbits in both layers offers the merit of simplicity in network configurations, it has disadvantages caused by the satellite concentration above high latitudes. The inclined orbit constellation offers the potential for reducing the required number of satellites, improving link properties, and enhancing the coverage in middle and low latitudes, by selecting the optimum orbital inclinations. The link properties between the satellites and terminals on the ground, optical ISL properties, and required number of satellites were evaluated for constellations using inclined orbits, and compared with those of a polar orbit constellation. Three kinds of inclined orbit constellations achieving continuous double coverage, which is a minimum requirement for future advanced satellite communications applying satellite diversity, were assumed for each layer. For each of the constellations, the orbital inclination dependency of the required number of satellites and the properties of optical ISLs between layers were examined. The latitude dependency of the properties for the links between the satellites and terminals on the earth was also evaluated. As a result, a constellation with a set of orbital parameters suitable for the double-layered constellation is shown. Since the double-layered constellation can be essentially considered as a combination of low earth orbit (LEO) and middle earth orbit (MEO) constellations, the results of these evaluations on the link properties for each layer can be applied to usual LEO and MEO constellations.
- 社団法人電子情報通信学会の論文
- 1997-01-25
著者
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KARASAWA Yoshio
The author is with University of Electro-Communications
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INAGAKI Keizo
the ATR Adaptive Communications Research Laboratories
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Inagaki Keizo
The Atr Optical And Radio Communications Research Laboratories:atr Adaptive Communications Research
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KIMURA Kazuhiro
the ATR Optical and Radio Communications Research Laboratories
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Karasawa Yoshio
The Atr Optical And Radio Communications Research Laboratories:atr Adaptive Communications Research
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Kimura K
National Inst. Of Information And Communications Technol. Koganei‐shi Jpn
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Karasawa Yoshio
The Advanced Wireless Communication Research Center (awcc) The University Of Electro-communications
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