At 04:45 AM 6/2/2010, Alan P. Biddle wrote:
John,
I meant to mention a nice page discussing Doppler shift. It explains many of the questions/comments/rants brought up about Doppler shifts and corrections:
Please use the official version
http://vkradio.com/doppler.html :)
You'll find the speed better. :)
It gives a few graphic illustrations of how Doppler shift varies depending on the pass, and why it can be radically different for different stations in the QSO. As you observed, Full Doppler Tuning, FDT, works for everybody, everytime. I will add that any can play. Anything else is just an approximation. We have 40 years of experience showing that approximation is usuable, but we have long been able to do better.
I agree, Full Dopller Tuning is the best way to go, if you have the gear. I'm looking forward to giving it a go, when I get my satellite antennas up. The radio and CAT interface are in position.
73 de VK3JED / VK3IRL http://vkradio.com