The Role of Time and Frequency in European Geostationary Navigation Delay (EGNOS)

A. Job, J. M. Pieplu, A. Batchelor, M. Brunet

Abstract:	The European Geostationary Navigation Overlay System (EGNOS) is being developed in Europe to provide GPS and GLONASS regional augmentation services to aviation, maritime, and land users. EGNOS will provide the following services: i) GEO-based GPS-like Ranging signals to improve the availability and continuity of GPS and GLONASS navigation services. ii) Ground Integrity Channel (GIC) to improve the integrity of GPS- and GLONASS-based navigation and position determination for safety-critical applications. And iii) Wide-Arm Differential corrections WAD) to improve the accuracy of GPS-SPS and GLONASS. Additionally, EGNOS will disseminate accurate time to users, synchronized to GPS, GLONASS, and UTC time scales. The paper provides an overview of EGNOS ground-segment architecture, gives requirements related to time aspects, and describes ,preliminary analysis and performances through test trials. It also covers initial results achieved in the frame of the EURlDlS program, conducted by CNES, after several months of measurements.
Published in:	Proceedings of the 30th Annual Precise Time and Time Interval Systems and Applications Meeting December 1 - 3, 1998 Hyatt Regency Reston Town Center Reston, Virginia
Pages:	469 - 482
Cite this article:	Job, A., Pieplu, J. M., Batchelor, A., Brunet, M., "The Role of Time and Frequency in European Geostationary Navigation Delay (EGNOS)," Proceedings of the 30th Annual Precise Time and Time Interval Systems and Applications Meeting, Reston, Virginia, December 1998, pp. 469-482.
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