... navigation data rate carried by the P code through phasemodulation is at a 50 Hz rate.5.5 C/ A CODE AND DATA FORMAT(1,2,5)The C/ A code is a bi-phase modulated signal with a chip rate of ... health indication of the transmitting satellite. The MSB (bit77) indicates a summary of thehealth of the navigation data, where bit77 equals:0 All navigation data are OK.1 Some or all navigation ... Global Positioning System: Theory and Applications, vols.1 and 2, Ameri-can Institute of Aeronautics and Astronautics, 37 0 L’Enfant Promenade, SW, Wash-ington, DC,1996.8. Raquet, J., “Navigation...