Originally Posted by
rickair7777
I'm pretty sure they do not, their actual functionality depends on waveform and frequency shifting so it would be hard to overlay encoding on top of that.
RADALTS on the same airframe use a frequency offset. De-confliction between aircraft is apparently just based on distance, ie two planes will not be over the MM at the same time, and unrestricted parallel approaches require at least several thousand feet of offset.
hmmm... wouldn't it be a simple matter of just time differential using a FFT? It knows when it transmitted, and then it knows how long it took to receive the same signal back, thus can calculate distance based on those two figures? Same as police radar works?
Thanks for the link, that looks fascinating, I have added it to my reading queue and will get to it in a few days!