Difference between revisions of "HF Propagation"
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* [http://www.wm7d.net/hamradio/solar/index.shtml WM7D Solar Research Page] | * [http://www.wm7d.net/hamradio/solar/index.shtml WM7D Solar Research Page] | ||
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Revision as of 19:59, 18 January 2016
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
- Earth View great for seeing Greyline
- Grey Line Map
- Near-Real-Time MUF Map
- Hourly Propagation Maps via HFPack
- Planetary View another Greyline view
- PropNet Communication Circuit Quality Report
- 4D View of Ionosphere NASA website
Software
- ACE HF
- Daylight Clock applet Greyline Display and Clock for the Logitech SqueezeBox series Wifi players.
- Proplab Pro
- SunClock
- VOACap
- VOAProp
- W6ELProp propagation prediction software
Technical
- DX QSL Net-Propagation
- DX Sherlock online db
- DXLC Solar Conditions
- HFRadio.org Propagation, Space Weather and Sunspot Cycle Resource Center
- IPS Radio and Space Services
- NOAA Space Weather Prediction Center
- Solar Cycle 24/SolarHam.com
- Solar Terrestrial Dispatch
- Topband Propagation
- WM7D Solar Research Page