Navigation accuracy issues for near-earth orbital users of GPS
Abstract
Near-earth (up to 1000 km altitude) users of GPS face a range of navigation accuracy related issues that differ from those faced by atmospheric users. GPS satellite visibility, ionospheric effects, and receiver navigation software all change character for orbital users. Potential navigation accuracy, especially with limited capability GPS user equipment and in situations of limited GPS satellite visibility, is generally better for near-earth users than it is for dynamic, atmospheric users. This paper provides an overview of these navigation issues and some example accuracy analysis results, partly based on experience in analyzing GPS equipment for such potential applications as the Space Shuttle and the National Oceanic Satellite System.
- Publication:
-
American Astronautical Society and American Institute of Aeronautics and Astronautics
- Pub Date:
- October 1980
- Bibcode:
- 1980aans.meet.....M
- Keywords:
-
- Global Positioning System;
- Space Navigation;
- User Requirements;
- Accuracy;
- Earth Orbits;
- Ionospheric Propagation;
- Navstar Satellites;
- Root-Mean-Square Errors;
- Zenith;
- Space Communications, Spacecraft Communications, Command and Tracking