The International Beacon Project (IBP) is a worldwide network of radio propagation beacons. It consists of 18 continuous wave (CW) beacons operating on five designated frequencies in the high frequency band.[1][2] The IBP beacons provide a means of assessing the prevailing ionospheric signal propagation characteristics to both amateur and commercial high frequency radio users.[1][2]
The project is coordinated by the Northern California DX Foundation (NCDXF) and the International Amateur Radio Union (IARU). The first beacon of the IBP started operations from Northern California in 1979. The network was expanded to include 8 and subsequently 18 international transmission sites.[1][2]
^ abc"Beacons". International Amateur Radio Union (iaru.org). Retrieved 14 October 2023. Except for short-term experiments ... the IARU does not support the operation of amateur beacons below 14 MHz because of congestion in these bands.
^ abcJennings, Peter (VE3SUN). "Introduction". Northern California DX Foundation (ncdxf.org). International Beacon Project. Retrieved 17 March 2017.{{cite web}}: CS1 maint: multiple names: authors list (link) CS1 maint: numeric names: authors list (link)
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