Abstract:
The WAAS, EGNOS, MSAS, and SNAS GPS-augmentation systems bridge the gap between the military applications of GPS and the needs of the civil aviation navigation community....Show MoreMetadata
Abstract:
The WAAS, EGNOS, MSAS, and SNAS GPS-augmentation systems bridge the gap between the military applications of GPS and the needs of the civil aviation navigation community. These USA, Europe, and Asian systems consist of a network of differential GPS ground stations, using principally the Inmarsat-3 geo-synchronous satellite constellation as the means of relaying the differential corrections to the users. In the process of providing precise navigation signals, GPS time is maintained through the Inmarsat-3 uplink/downlink networks. It is this functionality that provides for robust time retrieval for the time and frequency synchronization needs of the telecommunications community.
Published in: 2004 18th European Frequency and Time Forum (EFTF 2004)
Date of Conference: 05-07 April 2004
Date Added to IEEE Xplore: 16 June 2009
Print ISBN:0-86341-384-6
Print ISSN: 0537-9989