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Principles and Present Status
Published online by Cambridge University Press: 23 November 2009
Extract
The Navstar Global Positioning System (GPS) is a satellite-based passive radio-navigation system under development by the US Department of Defense (DOD) and due for operational deployment in the late 1980s. Each satellite carries an atomic frequency standard and transmits L-band spread-spectrum signals whose carrier frequencies and code epochs are synchronized with the satellite clocks. A suitably equipped user may measure the arrival time and frequency of the signals from at least four satellites to obtain accurate three-dimensional position and velocity information and, as a by-product, an accurate ‘system’ time.
Information
- Type
- Navstar GPS for Sea and Air Navigation
- Information
- Copyright
- Copyright © The Royal Institute of Navigation 1983
References
REFERENCES
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