Which of the following is the most fundamental for satellite navigation?(a) Power source in satellite(b) Position and acceleration of satellite(c) Distance from the Earth(d) Total number of satellites in the skyI got this question at a job interview.The query is from Orbital Mechanics and Clock Characteristics in section Satellite Radio Navigation& Inertial Navigation of Avionics

Which of the following is the most fundamental for satellite navigatio

1.	Which of the following is the most fundamental for satellite navigation?(a) Power source in satellite(b) Position and acceleration of satellite(c) Distance from the Earth(d) Total number of satellites in the skyI got this question at a job interview.The query is from Orbital Mechanics and Clock Characteristics in section Satellite Radio Navigation& Inertial Navigation of Avionics
Answer» Correct choice is (b) Position and acceleration of satellite The best I can EXPLAIN: All of the satellite navigation EQUATIONS have either satellite position or velocity as a VARIABLE. The linear independence of the equations, which dictate the observability of the navigation solution, is a function of the relative position of the satellites in orbit. Thus the position and the velocity of satellites is of PRIMARY importance.

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