Meteors constantly bombard the atmosphere leaving numerous ionized trails.
Athough individual trails are random, there is a long term continuum to provide almost continuous data throughput of around 100 baud average over ranges of 500 to 1000 miles. The optimum frequency seems to be around 40 MHz, making the 10 meter and 6 meter bands the most favorable. Usually data is transmitted at high data rates 4800 or 9600 baud so that the packet lengths are very short. On average a few get through every few minutes. K1HTV and W0RPK completed the first packet QSO between Maryland and Iowa during a meteor shower back in 1984.