1. Understanding GPS: Principles and Applications;Kaplan,2006
2. GLONASS approaches full operational capability (FOC);Daly,1995
3. Global Positioning System – a Modification to the Baseline Satellite Constellation for Improved Geometric Performance;Thomis,1984
4. Aerospace Avionics Systems;Siouris,1993
5. GPS Satellite Surveying;Leick,2003