Solar Flux, Sunspots, and Ionizing Radiation

Correlation Between Solar Flux and Sunspot Number

Correlation Between MUF and Solar Flux

Validating Propagation Predictions

The Structure of the Ionosphere

The M-Factor

Physics of Propagation - Refraction Absorption Polarization

Propagation Predictions and Wildly Varying Sunspot Numbers

Positive Electron Density Enhancements Due to Geomagnetic Field Activity