It has come to my attention that having got 74% in Radio navigation last time "every stone needs to be unturned" and I am a little confused on some of these questions.
If anyone can help me bearing in mind I find maths a pretty challenging subject I would be much appreciated.
1) Two NDBs, one 20nm from the coast and the other 50nm further inland. Assumning coastal error is the same for each, from which NDB will and aircraft flying over the sea recieve the greatest error?
Answer = NDB at 50nm (can I ask why because I thouhgt it was the NDB at 20nm)
2)The time taken from transmission of interrogation pulse to the reciept of the reply from DME groundstation is 2000 microseconds (ignore delay at the DME) Slant range is?
Answer = 165nm (was never sure how to do these questions)
3) The Maximum PRF required for range of 50nm is?
Answer = 1620pps (was never sure how to do this question either
)
4) Maximum theory range for the PRF of 1200pps is?
Answer = 67nm
5) PRF of a radar is 450pps, spped of light is 300,000kps. Maximum range of the radar?
Answer = 333km
6)To double the range of a primary radar, the power must be increased by a factor of ?
Answer = 16 (I thought this was 4)
Thanks all.
Jinkster