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 aircraftI 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

Which of the following cannot be measured in primary radar?(a) Height

1.	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 aircraftI 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
Answer» 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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