RESULTS OF A BLOCK I1 GPS USERS SURVEY

Thomas R. Bartholomew, Stephen M. Bloor

Abstract: As part of a system development the authors were required to select appropriate standards and cost-effective techniques for time recovery and frequency control. It quickly became apparent that GPS offered a good across-the-board solution to the system requirements for: • time recovery • synchrony • frequency control • syntony • precise positioning. It was also apparent, with the advent of Block II, selective availability (SA) and anti-spoofing (AS), that the performance of presently available time recovery receivers would potentially be inadequate to meet our system requirements. It was further evident that readily available, cost-effective receivers were not in the near-term plans of any of the contacted manufacturers. We therefore undertook to encourage the development and competitive availability of authorized user" receivers capable of achieving the full time and frequency performance capabilities of GPS within the Block II environment. As part of that effort we reviewed our requirements with a representative set of receiver manufacturers. In addition, we distributed a questionnaire to over 1300 projected "authorized users". This was an attempt to determine: 1. the range of user requirements; 2. the size of the potential market; and 3. the degree of user interest in establishing an authorized user" users group (AUUG). This paper presents the results of the survey, reports on our progress in organizing the user/working group and briefly describes some of the concepts proposed to provide cost-effective solutions to the problem.
Published in: Proceedings of the 21th Annual Precise Time and Time Interval Systems and Applications Meeting
November 28 - 30, 1989
Sheraton Hotel
Redondo Beach, California
Pages: 71 - 76
Cite this article: Bartholomew, Thomas R., Bloor, Stephen M., "RESULTS OF A BLOCK I1 GPS USERS SURVEY," Proceedings of the 21th Annual Precise Time and Time Interval Systems and Applications Meeting, Redondo Beach, California, November 1989, pp. 71-76.
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