Frequency control and time information in the Navstar/Global Positioning System
Abstract
All satellite clocks in the Navstar/Global Positioning System are referenced to a single ground based clock through periodic observations at fixed known locations, followed by a linearized real-time least squares estimation computation which establishes orbits and satellite time simultaneously. Satellite clocks are pseudorandom code generators driven by atomic standards from which the two carriers are also derived. Digital data are imposed modulo 2 on the PN code with data and code transitions coincident.
- Publication:
-
30th Annual Frequency Control Symposium
- Pub Date:
- 1976
- Bibcode:
- 1976frco.symp..371B
- Keywords:
-
- Atomic Clocks;
- Frequency Control;
- Global Positioning System;
- Navstar Satellites;
- Radio Navigation;
- Satellite Navigation Systems;
- Binary Codes;
- Frequency Stability;
- Global Tracking Network;
- Ground Based Control;
- Least Squares Method;
- Orbital Position Estimation;
- Pseudorandom Sequences;
- Real Time Operation;
- Satellite Networks;
- Instrumentation and Photography