A Suggested Approach for Augmenting GNSS Category III Approaches and Landings: The GPS/GLONASS and GLONASS Pseudolite System

Randal C. Galijan and Gerald V. Lucha

Abstract:	It has been report& previously that GPS alone is not sufficient to meet all of the Category III precision approach and landing requirements. This paper explores the potential use of combined GPWGLONASS receivers along with the deployment of ground-based GLONASS pseudolites as a means of achieving the accuracy, integrity, and availability required for Category III landings. Several reseatchefs have proposed and simulated the augmentation of GPS satellite signals with GLONASS satellite signals and/or GPS Ll and altemate- frequency pseudolites. One such proposed solution, which uses GPS Ll C/A code pseudolites, may be problematic because of the near/far problem. Use of GLONASS pseudolites, in comparison, would provide a near/far ratio approximately 20 times greater than GPS Ll C/A code pseudolites. A new system based on Stanford’s Kinematic Landing System (KLS) concept but employing GLONASS pseudolites is considered in this paper. This system could mitigate the near/far problem inherent in the use of GPS C/A code pseudolites, while potentially doubling the number of available satellites (e.g., GPS + GLGNASS).
Published in:	Proceedings of the 6th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1993) September 22 - 24, 1993 Salt Palace Convention Center Salt Lake City, UT
Pages:	157 - 160
Cite this article:	Galijan, Randal C., Lucha, Gerald V., "A Suggested Approach for Augmenting GNSS Category III Approaches and Landings: The GPS/GLONASS and GLONASS Pseudolite System," Proceedings of the 6th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1993), Salt Lake City, UT, September 1993, pp. 157-160.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In