Sky Morse Code
Society has collapsed, but maybe the relics of the preceding technological society are still there. Maybe there are satellites.
In a communications satellite, a satellite transponder receives
signals over a range of uplink frequencies, usually from a satellite
ground station. The transponder amplifies them, and re-transmits them
on a different set of downlink frequencies to receivers on Earth,
often without changing the content of the received signal or signals.
I can imagine these post-tech people putting together something to watch satellite movies. Communication, however, requires two ways. One could build a radio device and use a transponder satellite to retransmit messages. Phone lines that cannot be cut.
Cooler yet, though, would be the use of satellites for optical transmission. You would watch the satellite and read what it said. A satellite was launched to do exactly this.
Tiny Japanese Satellite Beams Morse Code Messages from Space
The bright flashes emitted by Japan's tiny FITSAT-1 satellite are
visible from the ground.
An ultra-small Japanese satellite is being spotted from the ground,
thanks to a set of lights that flash brightly in Morse code.
The novel cubesat, known as FITSAT-1, has been orbiting Earth since
early October of last year. Though it tips the scales at less than 3
pounds (1.3 kilograms), FITSAT-1's powerful light-emitting diodes
(LEDs) make it a compelling target for skywatchers.
"As long as the LEDs are active, then you will be able to see it using
binoculars," veteran Canadian satellite watcher Kevin Fetter told
One site could have the transmitter (just radio) and send the message up to the satellite, which would then retransmit in Morse code. On my farm I may not have a satellite dish or electricity to power any sort of radio receiver. But I have a pair of binoculars and I can see the night sky. And I can read morse code.
This would be a scenario I have not seen before. I can imagine the farm at night with the dad watching the sky and calling the dits and dahs, the kids copying them down. The kids call out the messages they translate from the Morse, youngest first.
A cool thing: just because you see the Morse and you can translate it into characters does not mean your translation is the real message. There may be more work to do...