Bob W7LRD, I disagree that Doppler shift will be zero when your window to work northern EU is optimum.
In SatPC32, I just did a Tracking->Preview and determined that when the AO-07 footprint includes both the northwest USA and northern Europe, the down link Doppler is +2.8 and up link Doppler is -8.3. Note, the numbers +2.8 and -8.3 were for orbit #60844. I also determined that if a different orbit, then you get different Doppler shifts. Determine the pass that you wish to attempt a contact and use the Doppler numbers you get from Tracking->Preview for that pass. Next pick a frequency using VFO mode in SatPC32 and do some experimenting. You may need to waste a window of opportunity, but using a ratio of -8.3/2.8 uplink to downlink Doppler, you should be able to do a respectable calculation. Another problem: The Doppler for the station in northern-EU will likely be different than yours. This means you might wish to coordinate with the station over there as you attempt contact. When I tried to enter grid JPnn into SatPC32, it would not accept it. It calculated NAN (not a number) for latitude. Don't know what that's about. However if you're using CW & not SSB, this may make little difference. As long as you're getting a CW signal in the band pass of your RX, you should be able to copy. And remember, the squeaky wheel gets the oil. Keep making noise about this on this BB until something works. I know you wanted a simpler answer. Hope this does not seem too complicated. The Trig/Math to work this out is possible, but tricky. Good luck. 73, Larry W7IN (home=DN27 Plains, Montana) _______________________________________________ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
