Am I correct in understanding how radio satellites works?

Assuming you have a directional antenna and are aware of when the satellite will pass, you can communicate to it just as you would any other repeater? This would of course allow for a very wide distance of communication, correct?

Are these mostly used for collecting QSL cards?

Sorry for the newb question. (Currently unlicensed but studying)

submitted by /u/MannDude
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