1. 2Fuchs, A. J., Wooden, W. H., and Long, A. C. "Autonomous Satellite Navigation with the Global Positioning System," AAS/AIAA Astrodynamics Specialist Conference, Jackson, Wyo., Sept. 1977.
2. Wooden, W.H. and Dunham, J. B. "Simulation of Autonomous Satellite Navigation with the Global Positioning System," AAS/AIAA Astrodynamics Conference, Palo Alto, Calif., Aug. 1978.
3. 4Hoffman, E. J. and Birmingham, W. P. "GPSPAC: A Spaceborne GPS Navigation Set," IEEE Conference, San Diego, Calif., Nov. 1978.