Global Positioning System receivers in space applications

Over the past few years, the use of Global Positioning Systems (GPS) has experienced explosive growth. Among the many applications is the use of GPS Receivers (GPSR) onboard space vehicles. With the large quantity of receivers available, finding one suitable for space applications is very difficult. This paper captures some of the "lessons learned" resulting from development efforts within Honeywell Commercial Systems Operation to integrate GPS technology into space borne navigation systems. The intent is to highlight a few of the major issues and differences between a GPSR for space, and the inexpensive terrestrial based receivers. Operating conditions including vehicle dynamics and environmental factors require a thorough understanding. Despite the difficult design issues, there remains considerable benefit in using GPS for spacecraft.