WAAS, EGNOS, and MSAS for Telecom Sync

The WAAS, EGNOs, and MSAS GPS Augmentation Systems bridge the gap between the military applications of GPS and the needs of civil aviation navigation. These USA, Europe, and Asian systems consist of a network of differential GPS ground stations, using principally the Inmarsat-3 geosynchronous satell...

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Bibliographische Detailangaben
1. Verfasser:	Fruehauf, Hugo
Format:	Report
Sprache:	eng
Schlagworte:	ACCURACY CIVIL AVIATION Commercial and General Aviation DIFFERENTIAL CORRECTION EGNOS(EUROPEAN GEOSTATIONARY NAVIGATION OVERLAY SYSTEM) GROUND STATIONS INMARSAT-3 MSAS(MULTIFUCTIONAL TRANSPORT SATELLITE SPACE-BASED AUGMENTATIONS SYSTEM) NAVIGATION SATELLITES RAIM(RECEIVER AUTONOMOUS INTEGRITY MONITOR) REQUIREMENTS SYNCHRONIZATION(ELECTRONICS) SYNCHRONOUS SATELLITES Test Facilities, Equipment and Methods TIME SIGNALS Unmanned Spacecraft WAAS(WIDE AREA AUGMENTATION SYSTEM)
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Zusammenfassung:	The WAAS, EGNOs, and MSAS GPS Augmentation Systems bridge the gap between the military applications of GPS and the needs of civil aviation navigation. These USA, Europe, and Asian systems consist of a network of differential GPS ground stations, using principally the Inmarsat-3 geosynchronous 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 downlinks. It is this functionality that provides fist robust time retrieval for the synchronization needs of the telecommunications community. This paper discusses: 1) The basic makeup and performance of the system 2) How time and frequency can be extracted for the telecom terminals 3) Added functionality and noise rejection capabilities using these signals for telecom timing applications 4) How the system offers the first true backup to the GPN C/A signal for telecom synchronization users. Presented at the Annual Precise Time and Time Interval (PTTI) Meeting (32nd), Reston, VA on 28-30 Nov 2000 and published in proceedings of the same, p31-44. See also ADM001509. The original document contains color images.