WSPRnet Weak Signal Propagation Reporter Network
Wikipedia says: WSPR (pronounced “whisper”) stands for “Weak Signal Propagation Reporter”. It is a computer program used for weak-signal radio communication between amateur radio operators. The program was initially written by Joe Taylor, K1JT, but is now open source and is developed by a small team. The program is designed for sending and receiving low-power transmissions to test propagation paths on the MF and HF bands.
I set my station to ‘listen’ on 30m to see what kind of conditions etc. Here’s the screen shots from various 24 hour periods recently
Weak Signal Propagation Report from VE6CV station