Re: Simple Radio Nav Q
None of it is simple at first - sometimes it just "clicks" what you are doing. Sometimes it just pays to learn some answers.
A pulse must travel there and back at the speed of light (as they always do) so you work out the time it takes to do that using a simple
TIME = DISTANCE/SPEED
(Make sure that if you are using 3000000 m/s as your speed, that you are also using KILOMETRES or METRES FOR YOUR DISTANCE.
Your answer is the time it takes for one Pulse and will be a fraction of a second and so all you have to do is work out how many of these fractions fit into one second to give you Pulses per second.
I found it easier sometimes to relate these questions to something far less daunting than aviation because sometimes that's the main hurdle. This I likened to bouncing a ball. PPS is the same as Number of bounces per second! (Just don't tell your Training Captain!!)