Hello group,
I was re-reading the chapter on
propagation in an RSGB book on Operating Practice, and it said
that the ionisation of our precious F layers (and also the D
absorbtion layer) was caused by Extreme UV radiation. This is
wavelengths 120nm up to 10nm.
We monitor the solar wind and solar
flares to try and predict what changes in propagation will
occur, but these things seem mainly to be negative influences
on propagation - things which disrupt the propagation.
It would be nice to monitor the EUV
levels from the Sun as well...
so my question is really "does anyone
know of a source of Internet data for this radiation?"
