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Which of the following cannot be measured in primary radar?

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Which of the following cannot be measured in primary radar?

(a) Height of the aircraft

(b) Speed of the aircraft

(c) Direction of the aircraft

(d) Position of the aircraft

I got this question at a job interview.

My enquiry is from Primary and Secondary Radar topic in section Surveillance Systems, Mapping and Multimode Radars of Avionics

1 Answer

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Correct option is (a) Height of the aircraft

Explanation: One of the major disadvantages of the primary radar is that it cannot provide a three dimensional fix, that is position and altitude. They are radars that can find the height of the aircraft but can only be used for short distances.

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