One thing I've discovered which makes things go more smoothly is to reduce
the minimum Doppler tuning interval.
I am using SatPC32 V12.8a. There are two parameters in the CAT menu -- the
Speed which I changed to 5x (which is not sticky) and the minimum Doppler
tuning step for SSB which I set to zero (it will be sticky if you remember
to click Store).
With these two changes, although the Doppler correction may drift off, it
does so very smoothly, which I assume allows the decoding of the BPSK data
to be more accurate.
Ron W5RKN
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