Solar Indicies and Propagation

original presentation by VE6TL 'Jerry'

http://www.hamqsl.com/shortcut.html
 
http://www.qsl.net/w2vtm/hf_solar.html

 http://www.radio-electronics.com/info/propagation/ionospheric/maximum-lowest-critical-optimum-usable-working-frequency.php
 
http://www.uksolphys.org/
 
http://www.arcetri.astro.it/~kreardon/EGSO/gbo/
 
http://www.bidstrup.com/w7ri-hf-radio-propagation.htm

http://astrosurf.com/luxorion/qsl-review-propagation-software.htm
 
http://www.ncdxf.org/pages/beacons.html
 
http://www.ips.gov.au/Satellite/2/2

From our former forum, here a recommendation from Walker McBryde:

I found this a helpful introduction to Solar activity and HF propagation:
http://www.qrparci.org/resource/FDIM81.pdf from the FDIM Symposium – 2005