3 ms·
The signal we receive is about one RF photon per second per square meter.
by ahazred8ta 2y ago
The signal we receive is about one RF photon per second per square meter.
- mmooss 2y agoThat's too incredible to be true. I'd love to quote it though - where does it come from?
- ahazred8ta 2y agoAh. This writeup https://gigazine.net/gsc_news/en/20240604-voyager-1-photons-per-bit https://gigazine.net/gsc_news/en/20240604-voyager-1-photons-... says that the 70m dish collects 240,000 photons per second, which is about 60 per second per square meter. The 1/sec figure was from the recent outage when Voyager's transmitter glitched and fell back to S-band. Received energy per bit is 4.5e-21 Joule across the whole dish, or 1e-24J per square meter.
- mmooss 2y agoToo bad; it was a great story. Still, they managed to communicate, in an emergency, using 1 photon/sec/m^2 !?