Understanding Solar Indices
- Understanding Solar Indices (ARRL pdf)
VOACAP
VOACAP (Voice of America Coverage Analysis Program) is free professional high-frequency (HF) propagation prediction software from NTIA/ITS, originally developed for Voice of America (VOA).
- www.voacap.com
example - www.voacap.com/area/ (Map per band/mode)
example
DR2D DX-Propagation
- dr2w.de/dx-propagation/
example
F2 MUF for selected skip distances
- propquest.co.uk/graphs.php
example
DXmaps
Great site with real time QSO/SWL information. Several options and overlays.
To get all options you need to register.
- DXmaps.com
example
SolarHam
- solarham.net
example
Space Weather Prediction Center
National Oceanic and Atmospheric Administration
