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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==
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* [http://ac6v.com/propagation.htm AC6V Propagation Links]  
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; Links
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* [http://www.eham.net/DX/propagation EHam Propagation Links]
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* [http://www.arrl.org/propagation-of-rf-signals ARRL Propagation pages]
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* [http://dx.qsl.net/propagation/greyline.html Grey Line Map]
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* [http://ac6v.com/propagation.php AC6V Propagation Links]  
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* [https://www.eham.net/propagation EHam Propagation Links]
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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
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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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* [http://hf.dxview.org HF Propagation 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.sec.noaa.gov NOAA Space Environment Center]
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* [https://prop.kc2g.com/ MUF map from KC2G]
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* [http://www.spaceweather.com Spaceweather.Com]
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* [http://www.spacew.com/www/realtime.php Near-Real-Time MUF Map]
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* [http://propnet.org/catch3.php?band=&last=1&call=&center=US PropNet Communication Circuit Quality Report]
  
 
==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]
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* [http://www.voacap.com VOACap]
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** [https://www.voacap.com/hf/ VOACap for ham radio]
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* [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
  
 
==Technical==
 
==Technical==
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* [http://www.swpc.noaa.gov/rt_plots/kp_3d.html Estimated Planetary K Index]
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* [http://www.arrl.org/the-sun-the-earth-the-ionosphere ARRL - Sun, Earth and the ionosphere]
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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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*[https://www.sws.bom.gov.au/ Australian Space Weather Services]
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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://dx.qsl.net/propagation/index.html DX QSL Net-Propagation]
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*[http://giro.uml.edu/ Global Ionosphere Radio Observatory]
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* [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.radionetherlands.nl/features/media/practical/solar.html The Solar Guide] via R Nederlands
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** [http://www.swpc.noaa.gov/impacts/hf-radio-communications HF Radio Communications]
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** [http://www.swpc.noaa.gov/communities/radio-communications Radio Communications Dashboard]
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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]
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* [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 in Media]]
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[[Category:HF Topics]]
 
 
[[Category:Propagation Links]]
 
[[Category:Propagation Links]]

Latest revision as of 10:21, 26 March 2023

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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