What is the primary function of the Doppler radar?(a) Determining true airspeed(b) Determining ground speed(c) Determining altitude(d) Detecting stealth aircraftI have been asked this question during an interview for a job.Question is taken from Doppler Radar in chapter Celestial Navigation, Doppler and Altimeter Radars of Avionics

What is the primary function of the Doppler radar?(a) Determining true

1.	What is the primary function of the Doppler radar?(a) Determining true airspeed(b) Determining ground speed(c) Determining altitude(d) Detecting stealth aircraftI have been asked this question during an interview for a job.Question is taken from Doppler Radar in chapter Celestial Navigation, Doppler and Altimeter Radars of Avionics
Answer» RIGHT answer is (b) Determining ground speed Easy explanation: The primary function of a DOPPLER radar is to determine the velocity vector of an aircraft with RESPECT to the ground. The velocity COMPONENT can be integrated into distance travelled and hence Doppler radar can be used as a primary sensor for dead reckoning.

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