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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>
  
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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
 
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software to view this site.
 
  
 
==Links and Online Maps==
 
==Links and Online Maps==
 
; Links
 
; Links
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* [http://ac6v.com/propagation.htm AC6V Propagation Links]  
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* [http://www.arrl.org/propagation-of-rf-signals ARRL Propagation pages]
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* [http://www.eham.net/DX/propagation EHam Propagation Links]
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* [http://ac6v.com/propagation.php AC6V Propagation Links]  
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* [http://www.hamradio-online.com/propagation.html Ham Radio Online- Radio Propagation Conditions]
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* [https://www.eham.net/propagation EHam Propagation Links]
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* [http://www.spaceweather.com Spaceweather.Com]
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* [https://hfstart.nict.go.jp/ HF-Start]
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* [https://soundbytes.asia/proppy/ Proppy]
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* [https://www.dit-dit-dit.com/simon-s-world-map Simon's World Map]
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; Online Maps
 
; Online Maps
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* [http://dx.qsl.net/propagation/greyline.html Grey Line Map]
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* [http://www.fourmilab.ch/cgi-bin/uncgi/Earth/action?opt=-p Earth View] great for seeing Greyline
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** [http://www.fourmilab.ch/cgi-bin/uncgi/Earth/action?opt=-p Earth View (Mercator projection)]
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** [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)]
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*[https://prop.kc2g.com/ MUF map from KC2G]
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* [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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* [http://www.fourmilab.ch/cgi-bin/uncgi/Earth/action?opt=-p Earth View] great for seeing Greyline
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* [http://propnet.org/catch3.php?band=&last=1&call=&center=US PropNet Communication Circuit Quality Report]
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* [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 Planetary View] another Greyline view
 
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* [http://science.nasa.gov/headlines/y2008/30apr_4dionosphere.htm 4D View of Ionosphere] NASA website
 
  
 
==Software==
 
==Software==
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* [http://home.att.net/~acehf/index.htm ACE HF]
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* [http://wiki.slimdevices.com/index.php/Daylight_Clock_applet Daylight Clock applet] Greyline Display and Clock for the Logitech SqueezeBox series Wifi players.
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* [http://home.att.net/~geoclock/index.html Geoclock]
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* [http://www.spacew.com/proplab/index.html Proplab Pro]
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* [http://www.mapmaker.com/sunclock.htm SunClock]
 
 
* [http://www.voacap.com VOACap]
 
* [http://www.voacap.com VOACap]
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** [https://www.voacap.com/hf/ VOACap for ham radio]
 
* [http://www.g4ilo.com/voaprop.html VOAProp]
 
* [http://www.g4ilo.com/voaprop.html VOAProp]
 
* [http://www.qsl.net/w6elprop W6ELProp] propagation prediction software
 
* [http://www.qsl.net/w6elprop W6ELProp] propagation prediction software
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* [http://wiki.slimdevices.com/index.php/Daylight_Clock_applet Daylight Clock applet] Greyline Display and Clock for the Logitech SqueezeBox series Wifi players.
 
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* [http://www.spacew.com/proplab/index.html Proplab Pro]
 
  
 
==Technical==
 
==Technical==
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* [http://www.arrl.org/the-sun-the-earth-the-ionosphere ARRL - Sun, Earth and the ionosphere]
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*[https://www.sws.bom.gov.au/ Australian Space Weather Services]
 
* [http://dx.qsl.net/propagation/index.html DX QSL Net-Propagation]
 
* [http://dx.qsl.net/propagation/index.html DX QSL Net-Propagation]
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* [http://www.dxlc.com/solar/ DXLC Solar Conditions]
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*[http://giro.uml.edu/ Global Ionosphere Radio Observatory]
 
* [http://www.hfradio.org/propagation.html HFRadio.org Propagation, Space Weather and Sunspot Cycle Resource Center]
 
* [http://www.hfradio.org/propagation.html HFRadio.org Propagation, Space Weather and Sunspot Cycle Resource Center]
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* [https://www.hfunderground.com/propagation/ HF Underground - Propagation Data and Tools]
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*[http://www.spaceweather.org/ International Space Environment Service]
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*[https://stereo.gsfc.nasa.gov/  NASA Stereo Website (Goddard Space Flight Center)]
 
* [http://www.swpc.noaa.gov/ NOAA Space Weather Prediction Center]
 
* [http://www.swpc.noaa.gov/ NOAA Space Weather Prediction Center]
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** [http://www.swpc.noaa.gov/rt_plots/kp_3d.html Estimated Planetary K Index]
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** [http://www.swpc.noaa.gov/impacts/hf-radio-communications HF Radio Communications]
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* [http://www.spacew.com/ Solar Terrestrial Dispatch]
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** [http://www.swpc.noaa.gov/communities/radio-communications Radio Communications Dashboard]
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* [http://www.radionetherlands.nl/features/media/practical/solar.html The Solar Guide] via R Nederlands
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** [http://www.swpc.noaa.gov/communities/space-weather-enthusiasts Space Weather Enthusiasts Dashboard]
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** [https://www.swpc.noaa.gov/communities/radio-communications NOAA Radio Communications Dashboard]
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** [https://www.swpc.noaa.gov/products/real-time-solar-wind NOAA Real Time Solar Wind]
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* [https://www.robkalmeijer.nl/techniek/electronica/radiotechniek/hambladen/qst/1992/11/page80/index.html Rob's Web - Introduction to Grey Line DXing]
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* [https://www.qrparci.org/resource/FDIM81.pdf Solar Activity and HF Propagation] '''Note:''' PDF file from QRPARCI
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* [https://sdo.gsfc.nasa.gov/ Solar Dynamics Observatory]
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* [https://www.solarham.net/ SolarHam]
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** [https://www.solarham.net/help_center.htm?fbclid=IwAR1tE75FxQq02cV-QQ_f_Zb8d-1bfNMo4OQmm029n0CgvnBNX5vhpZeGvbw Solar Ham Terms and Events]
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* [https://sohowww.nascom.nasa.gov/ Solar and Heliospheric Observoatory (SOHO)]
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*[http://sidc.oma.be/ Solar Influences Data Analysis Center]
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* [https://solarmonitor.org/  SolarMonitor.org]
 
* [http://www.spacew.com/ Solar Terrestrial Dispatch]
 
* [http://www.spacew.com/ Solar Terrestrial Dispatch]
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*[https://www.spaceweather.com/  Spaceweather.com]
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*[https://www.spaceweather.gc.ca/ SpaceWeather Canada]
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* [https://stereo.gsfc.nasa.gov/ Stereo]
 
* [http://www.spacew.com/www/topband.html Topband Propagation]
 
* [http://www.spacew.com/www/topband.html Topband Propagation]
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*[https://www.tgo.uit.no/  Tromso (Norway) Geophysical Observatory]
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* [https://www.wm7d.net/hamradio/solar/ WM7D Solar Research Page]
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* [https://www.qsl.net/w2vtm/grayline.html Working the Grey Line]
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*[https://www.hfpropagation.com/ Usable HF Frequencies - Amateur Radio]
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* [https://www.gi.alaska.edu/monitors/aurora-forecast University of Alaska Fairbanks Geophysical Institute Aurora Forecast]
  
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[[Category:HF Topics]]
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[[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

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