Abstract

In this paper the service availability predictions of three proposed 1st generation mobile satellite systems (MSS) are presented in a range of operational environments between 0° and 70° latitude. The most important factor in determining the performance of an MSS is the probability of signal shadowing which depends both on the user environment and on the constellation. In order to reduce the probability of being shadowed and to enhance the quality of service two of the considered constellations exploit satellite diversity. Copyright © 1999 John Wiley & Sons, Ltd.

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