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Difference between revisions of "HF Propagation"

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* [http://www.ips.gov.au IPS Radio and Space Services]
 
* [http://www.ips.gov.au IPS Radio and Space Services]
 
* [http://www.swpc.noaa.gov/ NOAA Space Weather Prediction Center]
 
* [http://www.swpc.noaa.gov/ NOAA Space Weather Prediction Center]
** [http://www.swpc.noaa.gov/alerts/solar_indices.html Current Geomagnetic and Solar Indices]
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** [http://www.swpc.noaa.gov/impacts/hf-radio-communications HF Radio Communications]
** [http://www.swpc.noaa.gov/Data Data and Products]  
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** [http://www.swpc.noaa.gov/communities/radio-communications Radio Communications Dashboard]
** [http://www.swpc.noaa.gov/today.html Todays's Space Weather]
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** [http://www.swpc.noaa.gov/communities/space-weather-enthusiasts Space Weather Enthusiasts Dashboard]
** [http://www.swpc.noaa.gov/SWN Space Weather Now]
 
** [http://www.swpc.noaa.gov/radio Radio User's Page]
 
** [http://www.swpc.noaa.gov/Education Educaton and Outreach]
 
 
* [http://www.solarham.com Solar Cycle 24/SolarHam.com]
 
* [http://www.solarham.com Solar Cycle 24/SolarHam.com]
 
* [http://www.spacew.com/ Solar Terrestrial Dispatch]
 
* [http://www.spacew.com/ Solar Terrestrial Dispatch]

Revision as of 16:15, 18 November 2017

Radio and TV signals aren't always limited to traveling line of sight distances. On HF this is commonly caused by refraction (bending) of the signal at the upper layers of the atmosphere known as the ionosphere. On frequencies higher than this, while solar activity plays a role, Earth based weather events are the most common cause of propagation. These links explore several sites, and software, that can be used to help predict how a HF signal will propagate. For propagation topics above 30 Mhz, please see our DXing Above 30 Mhz article.

If you're just getting started in the HF hobby, AE4RV's Propagation Primer is an excellant place to start. Note that you need the most up to date Flash software to view this site.

Links and Online Maps

Links
Online Maps

Software

Technical