Question

Which coordinate system is used in satellite based radio navigation?

(a) Earth centered, Earth fixed

(b) Earth centered inertial

(c) Geodetic spherical coordinates

(d) Geodetic wander azimuth

I had been asked this question in an interview for job.

This interesting question is from Navigation Equations topic in chapter Introduction & Navigation Equations of Avionics

Answer 1

Correct option is (a) Earth centered, Earth fixed

For explanation: Satellite based radio navigation system uses ECEF coordinated to calculate satellite and aircraft position. The origin is at the mass center of the earth and its axis lies along the earth’s spin axis.