Some rough and ready calculations *assuming a LEO* are that PSK needs the TX frequency adjusting every second or so, certainly over the duration of a short PSK transmission no Doppler correction on TX at 29MHz will result in no QSO.
But there's plenty of software which can adjust an HF transmitter so it'll just be a question of user education. Myself I would probably TX with my TS-480 and RX with a TS-2000.
PSK-125 may be a better option as it is on 6m when there's an opening (such as today).
Simon Brown, HB9DRV www.ham-radio-deluxe.com
----- Original Message ----- From: n3tl@bellsouth.net
I think it's a great idea. I suspect there will, indeed, be some Doppler challenges.
Although, I wonder.... How would Doppler's impact on PSK-31 be different from, say, SSTV? I ask because the SSTV schedules on AO-51 have been pleasantly surprising to me, in terms of the quality of image I was getting.