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IEE Colloquium on Highly Elliptical Orbit Satellite Systems

24-24 May 1989

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Displaying Results 1 - 14 of 14
  • IEE Colloquium on 'Highly Elliptical Orbit Satellite Systems' (Digest No.86)

    Publication Year: 1989
    IEEE is not the copyright holder of this material | PDF file iconPDF (19 KB)
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  • The place of highly elliptical orbit satellites in future systems

    Publication Year: 1989, Page(s):1/1 - 1/4
    Cited by:  Papers (2)  |  Patents (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (186 KB)

    Following the evolution of satellite communication systems towards increasingly sophisticated applications all over the world and in view of harmonizing and expanding the studies carried out in Europe on advanced systems using highly elliptical orbits, ESA has elaborated a comprehensive programme named Archimedes to experiment and demonstrate in orbit, with one or two satellites in highly inclined... View full abstract»

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  • Review of ESA Archimedes study 1

    Publication Year: 1989, Page(s):2/1 - 2/4
    Cited by:  Papers (2)  |  Patents (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (198 KB)

    The Archimedes study examined the technical and economic feasibility of developing a system of satellites in highly inclined elliptical orbits to provide land mobile communications in Europe. The paper presents the conclusions of the British Aerospace-led team, showing the performance that can be achieved from an inclined orbit system and comparing it with that achievable from a GEO system.<<... View full abstract»

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  • Land mobile communications from nongeostationary orbits (review of Archimedes ESA study)

    Publication Year: 1989, Page(s):3/1 - 3/6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (175 KB)

    The work performed during the Archimedes ESA study included the following: mission, orbits and launch strategies analyses; telecommunication system definition; satellite payload and platform design; ground segment investigations (user terminal, fixed earth stations, mission control station); and economic viability. The main results of these different analyses are reviewed.<<ETX>> View full abstract»

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  • Sound broadcasting applications of highly elliptical orbits

    Publication Year: 1989, Page(s):4/1 - 4/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (181 KB)

    Through two contracts placed with Aerospatiale and British Aerospace, the European Space Agency has studied in detail the application of highly elliptical orbits to mobile communications in Europe. Through this work it has become clear that despite the relatively 'unconventional' nature of these orbits, their use has a number of advantages, mainly related to avoidance of shadowing and the possibil... View full abstract»

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  • The architecture of the LOOPUS MobD system (satellite communications)

    Publication Year: 1989, Page(s):5/1 - 5/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (224 KB)

    Both the technological feasibility of inclined orbit satellite communication systems and the specification of the terrestrial pan-European cellular radio system as recommended by the CEPT Groupe Special Mobile (GSM), form the basis for the digital mobile satellite system LOOPUS MobD, the architecture of which is outlined. Satellites active in their northern orbital arcs allow in Europe for high el... View full abstract»

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  • The SYCOMORES system (mobile satellite communications)

    Publication Year: 1989, Page(s):6/1 - 620
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (271 KB)

    Outlines the facilities of the System Communication Mobile Relayed Satellite (SYCOMORES). The system was developed to provide a land mobile radiotelephony service and data broadcasting over Europe. The system was designed under the following constraints: fulful the major parts of the initial needs of the European market; highest re-use of the actual technology and existing platform; solve the link... View full abstract»

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  • The mobile payload of the UK T-SAT project

    Publication Year: 1989, Page(s):7/1 - 7/7
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (218 KB)

    The origin of the UK T-SAT project dates back to the Communication Engineering Research Satellite (CERS) where a University Consortium coordinated through Rutherford Appleton Laboratory studied advanced communications satellite concepts in the early 1980s. The combination of nongeostationary highly-inclined elliptical orbit and onboard processing for land satellite mobile applications, developed i... View full abstract»

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  • HEO spacecraft and launch scenarios

    Publication Year: 1989
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (27 KB)

    Highly elliptical orbit (HEO) communication satellite missions which have been studied in Europe in the last few years use either 12 hour (Molniya) or 24 hour (Tundra) Earth synchronous orbits inclined at 63.4 degrees. These orbits have the facility to be able to provide land mobile communications services to medium and high latitude countries (e.g. Europe) with a high elevation angle. This reduce... View full abstract»

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  • Review of propagation aspects of highly elliptical orbits

    Publication Year: 1989, Page(s):9/1 - 9/6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (342 KB)

    Propagation characteristics of land mobile satellite links are a major factor governing the viability of such a system. The main problems arise due to shadowing and multipath effects caused by the nature of the environment in the vicinity of a mobile. Due to the complexity of the process the land mobile propagation problem has not yet been completely solved by analytical means although partial ana... View full abstract»

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  • Change-over strategies for highly elliptical orbits

    Publication Year: 1989, Page(s):10/1 - 10/6
    Cited by:  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (235 KB)

    The communication performance of satellite systems using high inclined elliptical orbits has to be changed-over from one satellite to the other. For typical orbit systems using 24 h Tundra orbits or 12 h Molniya orbits this must be performed two or three times a day, respectively. The paper summarizes different strategies identified for the Archimedes voice communication land mobile satellite syst... View full abstract»

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  • Archimedes mission aspects (mobile satellite communications)

    Publication Year: 1989, Page(s):11/1 - 11/6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (352 KB)

    Satellite technology is well suited to mobile communications, particularly over wide areas of Europe. The advent of such a service will help to equalize the availability of telecommunications services between urban and remote areas. The analysis of new communications services had led one to consider non-conventional orbits for future satellites system implementation. The main aspects of possible t... View full abstract»

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  • Power control in a highly elliptical orbit satellite system

    Publication Year: 1989, Page(s):12/1 - 12/6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (304 KB)

    Considers the implementation and performance of power control in a communication satellite system employing a highly elliptical orbit. In particular, the paper refers to the EAS/Archimedes land mobile system as studied by the BAe consortium. The purpose of power control is to adjust the EIRP from the satellite, ideally for each call, in order to eliminate unnecessary margins from the link. This wi... View full abstract»

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  • Radio regulatory aspects of highly elliptical orbit satellites

    Publication Year: 1989, Page(s):13/1 - 13/6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (265 KB)

    The ITU is responsible for the international radio regulations that lay down agreed conditions for the operation of all radio services. Much interest has recently been focused on the use of highly elliptical orbits for the land mobile satellite service (LMSS) and satellite sound broadcasting. The case of such satellites falls under the general classification of nongeostationary satellite which in ... View full abstract»

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