Changes
in the MUF on HF during the day/nightChanges
in the MUF on HF during the day/night
| Establishing radio communication links in the lower HF bands (below
10 MHz) during a normal day is very difficult because the sun's radiation
produces a lot of absorption of the radio signals. This absorption disappears
at night as soon as the sun goes down, opening up these bands for use.
However you generally loose the upper HF bands because the maximum useable
frequencies (MUF) at night are much low.
|