Oxford, Air Navigation
Airborne Weather Radar: DGCA Air Navigation questions
Airborne weather radar shows heavy rain ahead so a crew can steer round the storms that carry it. It is a primary radar, timing echoes from raindrops, and it also has a ground mapping mode.
Its 11 questions cover frequency and band, why that frequency, a pulse rate for a given range, pencil and fan shaped beams, antenna stabilisation, display colours and false returns. Exam sessions have included 1 from this chapter.
The radar sees water, not turbulence, so clear air turbulence gives no return and dry hail or snow only a weak one. A strong cell can absorb the beam and leave a dark area behind it that looks clear and is not.
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Question 1 of 5
A frequency used by airborne weather radar is:
Question 2 of 5
An airborne weather radar is required to detect targets up to a maximum range of 200 NM. Ignoring pulse length and flyback in the CRT, calculate the maximum Pulse Repetition Rate (PRR).
Question 3 of 5
Using airborne weather radar, the weather beam should be used in preference to the fan-shaped beam for mapping in excess of how many NM?
Question 4 of 5
Airborne Weather Radar is an example of ______ radar operating on a frequency of ______ in the ______ band.
Question 5 of 5
The correct sequence of colours on a colour Airborne Weather Radar display as return signals get stronger is:
6 more questions in this chapter
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