Mobile Satellite Systems (MSS) in Highly Elliptical (HEO) and circular Earth orbits at Medium (MEO) and Low (LEO) altitudes have been intensively studied in the last few years as an effective means of providing global communication services. Such global coverage MSS networks are also expected to mitigate typical channel impairments usually encountered in geostationary Land Mobile Satellite (LMS) systems. In the design stages of these satellite networks, information regarding the mobile propagation channel is needed to assess the overall link availability versus elevation angle and environmental scenarios. For multisatellite LMS configurations, the mobile user on the Earth surface sees, at any given time, more than one satellite of the constellation. In our paper, it is shown that, under certain working assumptions regarding the statistics of the propagation channel, an improvement of the link availability may be achieved through the use of a multisatellite constellation. The analyses have been carried out using the European Space Agency (ESA) LMS propagation data base which presently covers a wide range of elevation angles and environmental scenarios.
Global Coverage Mobile Satellite Systems: System Availability Versus Channel Propagation Impairments
1993
6 pages
Report
No indication
English
Common Carrier & Satellite , Space Technology , Land mobile satellite service , Satellite networks , Circular orbits , Earth orbital environments , Geosynchronous orbits , Synchronous platforms , Telecommunication , Data bases , Elevation angle , European space agency , Low altitude , Foreign technology
Propagation Impairments for Arctic Satellite Telecommunication Systems
British Library Conference Proceedings | 2012
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