Couple of things regarding this thread:
It's not necessarily the stronger radar that does it, it's the fact that Trackman has a phased array of radars - in other words multiple radars angled in different directions. Accuracy over distance with a single radar can only be done if the radar rotates with the target, which of course is not practical in launch monitors.Anthony wrote: Another question I have for those radar guys is "I wonder why the trackman can track the ball its whole length and the Zelocity makes no claim as to that". I guess a stronger radar.
I also remember reading somewhere that whereas the shift in frequency of the reflected pulse leads us to ball speed, the shift in phase can be used for measuring ball spin. I could imagine with their array of radars, they probably get quite different 'voiceprints' for different launch conditions from which a lot can be determined.
Here's an article worth a read if you haven't seen it already Dave, from the guys who helped out Trackman with the DSP:
http://www.fpgajournal.com/articles_200 ... 5_golf.pdf