rootofallworlds t1_j1d17zo wrote
The Doppler shift in the frequency from a satellite transceiver is measurable and needs to be taken into account. In ham radio use this means adjusting the frequency on the ground transceiver during the satellite pass. Commercial systems will automate such corrections.
https://n1aae.com/visualizing-satellite-doppler-shift/
https://upcommons.upc.edu/handle/2117/123510
What will help is something in the signal that the receiver can "lock on" to in order to tolerate slight mistuning. With analogue modulation that's a "carrier" frequency which has no data but provides a frequency reference the receiver can "lock on" to. AM, FM, and analogue TV include such a carrier. By contrast single sideband with no carrier, popular in ham radio, will give the receiver an audible pitch shift if they are not precisely tuned. For digital modulation things are more complicated but there are still ways to handle that mistune, and indeed devices don't give the user control over the precise frequency.
tea-drinker t1_j1d1hyl wrote
I would also add that Earth-Moon-Earth propagation can also cause Doppler shift to a meaningful degree.
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