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Re: lower frequency downlinks

Jerry W expunged (k0hzi.mn@gmail.com):

> Fred,
> Along with a few others, I tested PSK31 on PCSAT-2.  10 meter up-link
> and 145.825 down-link, was very difficult to keep the PSK signal tuned
> along with the doppler shift even with NOVA and WispDDE.  So some work
> needs to be done with PSK to compensate for doppler if it is going to
> be used on satellites IMHO.

Don't forget, the doppler rate for X frequency at HEO is slower than for a LEO. I like the Idea of a PSK type transponder and it might be a good platform for experiment for other digital modes (like a psk with the ability to compensate for doppler

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