Tuesday, 2 August 2011
UK propagation charts for August 2011
Well, we are moving away from the summer solstice, but we are a long way from the better autumnal HF conditions that we should start to see in mid September.
The summer sporadic E season should also be diminishing too.
The last month or so has been characterised by big swings in the solar flux index and pretty poor conditions, although it doesn't pay to generalise. A chance glance at 17m a week or so ago showed a station from Los Angeles, calling CQ and with very few takers. He was about the only signal on the band!
These charts are based on a smoothed sunspot number of 45. The SSN is what is recommended by the originators of VOACAP and might seem a little low, but it is supposed to give better predictions.
Go to the propagation charts