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The closest to store and forward used right now which is easily doable is JS8CALL on, believe it or not, HF. A station can put a message on a ground station , say a California station, could put one on a south African station in a mailbox on that station. A station which sends out a beacon, say in Europe, is notified that a message is waiting for it from the ...


AMSAT-DL has heard their own echoes on an Earth-Venus-Earth path, on the 13cm band, with the help of the 20-meter dish at Bochum Observatory. It falls a little short of "communication", but it seems that, given two stations with 20m dishes, a Venus-bounce QSO using QRSS, or perhaps one of the slow FSK modes (FST4?) would be achievable.

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