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WHAT IS PROPAGATION?

Radio waves, like light waves and all other forms of electromagnetic radiation, normally travel in straight lines. Obviously this does not happen all  the time, because long - distance communication depends on  radio waves traveling  beyond the horizon. How radio waves propagate in  other than straight-line paths  is a complicated subject, but one that  need not be a mystery. This page provides  basic understanding of the  principles of electromagnetic radiation, the structure of the Earth's  atmosphere and solar-terrestrial interactions necessary  for a working  knowledge of radio propagation. More detailed discussions and the   underlying mathematics of radio propagation physics can be found in the  references listed under additional resources.  


Example of how radio waves travel

Radio Waves

Example of how radio waves Travel 

Dusk to Dawn then it's Gone

Gray line Propagation

Additional info

Some additional links here

Downloads

  Radio waves, like light waves and all other forms of electromagnetic radiation, normally travel in straight lines. Obviously this does not  happen all  the time, because long - distance communication depends on  radio waves traveling  beyond the horizon. How radio waves propagate in  other than straight-line paths  is a complicated subject, but one that  need not be a mystery. Click this link for Propagation Software 

Understanding Propagation (pdf)Download
Understanding HF propagation (pdf)Download
An Introduction to HF propagation (pdf)Download
Understanding_LF_and_HF_propagation (pdf)Download

SPACE WEATHER WOMAN

TamithaSkov, I am a space weather physicist. You may recognize me from TV shows I've  done for The History Channel and The Weather Channel. I've been featured  in Popular Science Magazine, and I do regular Space Weather broadcasts  on TWiT TV. I want to open your world to a new kind of weather that's  becoming important to our daily lives. 


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