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Old 8th January 2006 | 11:36
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VC10 Rib22
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Joined: Jan 2004
Posts: 181
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From: Sky
Re: Simple Radio Nav Q

iflyhighinthesky,

From your post I fear that HWD's reply may presume too much of you. If I'm wrong I apologise. Maybe this would help:

The radar pulse must travel 185km [ 100nm (50nm to the target and 50nm back from the target)] before the next pulse transmission.

The time for this journey (Time = Distance/Speed) equals 185000(metres)/300000000 (seconds) (speed of light)
i.e. 0.000617 seconds which equals 617us [617 x 1/(10 to the power of 6)] i.e. the PRI = 617us

PRF(pps) = 1/PRI = 1000000/617 = 1620pps

Hope this helps

VC10 Rib22
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