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Difference between revisions of "HF Propagation"

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please see our [[DXing Above 30 Mhz]] article.<br>
 
please see our [[DXing Above 30 Mhz]] article.<br>
  
If you're just getting started in the HF hobby, [http://www.ae4rv.com/tn/propflash.htm 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 and Online Maps==
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* [https://www.eham.net/propagation EHam Propagation Links]
 
* [https://www.eham.net/propagation EHam Propagation Links]
 
* [https://hfstart.nict.go.jp/ HF-Start]
 
* [https://hfstart.nict.go.jp/ HF-Start]
 +
* [https://soundbytes.asia/proppy/ Proppy]
 
* [https://www.dit-dit-dit.com/simon-s-world-map Simon's World Map]
 
* [https://www.dit-dit-dit.com/simon-s-world-map Simon's World Map]
* [http://www.spaceweather.com Spaceweather.Com]
 
  
 
; Online Maps
 
; Online Maps
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** [http://www.fourmilab.ch/cgi-bin/uncgi/Earth/action?opt=-p Earth View (Mercator projection)]
 
** [http://www.fourmilab.ch/cgi-bin/uncgi/Earth/action?opt=-p Earth View (Mercator projection)]
 
** [http://www.fourmilab.ch/cgi-bin/uncgi/Earth?imgsize=320&opt=-l&lat=37.0833&ns=North&lon=72.4167&ew=West&alt=35785&img=learth.evif Earth view (from above)]
 
** [http://www.fourmilab.ch/cgi-bin/uncgi/Earth?imgsize=320&opt=-l&lat=37.0833&ns=North&lon=72.4167&ew=West&alt=35785&img=learth.evif Earth view (from above)]
 +
*[https://prop.kc2g.com/ MUF map from KC2G]
 
* [http://www.spacew.com/www/realtime.php Near-Real-Time MUF Map]
 
* [http://www.spacew.com/www/realtime.php Near-Real-Time MUF Map]
 
* [http://www.hfpack.com/propagation/ Hourly Propagation Maps] via HFPack
 
* [http://www.hfpack.com/propagation/ Hourly Propagation Maps] via HFPack
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** [https://www.swpc.noaa.gov/communities/radio-communications NOAA Radio Communications Dashboard]
 
** [https://www.swpc.noaa.gov/communities/radio-communications NOAA Radio Communications Dashboard]
 
** [https://www.swpc.noaa.gov/products/real-time-solar-wind NOAA Real Time Solar Wind]
 
** [https://www.swpc.noaa.gov/products/real-time-solar-wind NOAA Real Time Solar Wind]
 +
* [https://www.robkalmeijer.nl/techniek/electronica/radiotechniek/hambladen/qst/1992/11/page80/index.html  Rob's Web - Introduction to Grey Line DXing]
 
* [https://www.qrparci.org/resource/FDIM81.pdf Solar Activity and HF Propagation] '''Note:''' PDF file from QRPARCI
 
* [https://www.qrparci.org/resource/FDIM81.pdf Solar Activity and HF Propagation] '''Note:''' PDF file from QRPARCI
 
* [https://sdo.gsfc.nasa.gov/ Solar Dynamics Observatory]
 
* [https://sdo.gsfc.nasa.gov/ Solar Dynamics Observatory]
 
* [https://www.solarham.net/ SolarHam]
 
* [https://www.solarham.net/ SolarHam]
* [https://sohowww.nascom.nasa.gov/ Solar and Heliospheric Observoatory (SOHO]
+
** [https://www.solarham.net/help_center.htm?fbclid=IwAR1tE75FxQq02cV-QQ_f_Zb8d-1bfNMo4OQmm029n0CgvnBNX5vhpZeGvbw Solar Ham Terms and Events]
 +
* [https://sohowww.nascom.nasa.gov/ Solar and Heliospheric Observoatory (SOHO)]
 
*[http://sidc.oma.be/ Solar Influences Data Analysis Center]
 
*[http://sidc.oma.be/ Solar Influences Data Analysis Center]
 
* [https://solarmonitor.org/  SolarMonitor.org]
 
* [https://solarmonitor.org/  SolarMonitor.org]
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*[https://www.spaceweather.com/  Spaceweather.com]
 
*[https://www.spaceweather.com/  Spaceweather.com]
 
*[https://www.spaceweather.gc.ca/ SpaceWeather Canada]
 
*[https://www.spaceweather.gc.ca/ SpaceWeather Canada]
 +
* [https://stereo.gsfc.nasa.gov/ Stereo]
 
* [http://www.spacew.com/www/topband.html Topband Propagation]
 
* [http://www.spacew.com/www/topband.html Topband Propagation]
 
*[https://www.tgo.uit.no/  Tromso (Norway) Geophysical Observatory]
 
*[https://www.tgo.uit.no/  Tromso (Norway) Geophysical Observatory]
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* [https://www.qsl.net/w2vtm/grayline.html Working the Grey Line]
 
* [https://www.qsl.net/w2vtm/grayline.html Working the Grey Line]
 
*[https://www.hfpropagation.com/ Usable HF Frequencies - Amateur Radio]
 
*[https://www.hfpropagation.com/ Usable HF Frequencies - Amateur Radio]
 +
* [https://www.gi.alaska.edu/monitors/aurora-forecast University of Alaska Fairbanks Geophysical Institute Aurora Forecast]
  
 
[[Category:HF in Media]]
 
[[Category:HF in Media]]
 
[[Category:Propagation Links]]
 
[[Category:Propagation Links]]

Revision as of 21:18, 13 November 2021

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.


Links and Online Maps

Links
Online Maps

Software

Technical