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Multiple "Sweepers" on my Cascade
Hello, I would like to know if you guys know what these "sweepers" are (see picture below). I think they could be radars from ships, but I'm not sure.
Thanks!
Thanks!
Comments
https://en.wikipedia.org/wiki/Over-the-horizon_radar
There are Six 'usual suspects'
These four tend to sit on specific frequencies for long periods of time.
Cyprus (Pluto)
China
Russia (Kontayner)
Iran (Ghadir)
What you are seeing is probably either Jindalee Operational Radar Network (JORN) from Australia or Superdarn
These move around to track propagation, but tends to operate on frequencies close to each other.
JORN also tends to change the sweep rate on a specific frequency, typically switching between three different rates in sequence.
https://en.wikipedia.org/wiki/Jindalee_Operational_Radar_Network
https://www.sigidwiki.com/wiki/Jindalee_Operational_Radar_Network_(JORN)
https://en.wikipedia.org/wiki/Super_Dual_Auroral_Radar_Network
https://www.sigidwiki.com/wiki/SuperDARN_(Super_Dual_Auroral_Radar_Network)
https://superdarn.ca/real-time
https://www.sigidwiki.com/wiki/PLUTO_II_OTH_Radar
http://www.chinatopix.com/articles/112419/20170314/radar-thaad-over-the-horizon-radar-oth-radar-intercontinental-ballistic-missile.htm
https://en.wikipedia.org/wiki/Container_radar
https://www.sigidwiki.com/wiki/29B6_'Kontayner'_OTH_Radar
https://www.sigidwiki.com/wiki/'Ghadir'_OTH_Radar
In addition there are many surface wave radars, but these tend to be a lot weaker and have a slower sweep rate.
http://www.codar.com/intro_hf_radar.shtml
https://cordc.ucsd.edu/projects/mapping/maps/
https://www.sigidwiki.com/wiki/CODAR
Regards,
Martin - G8JNJ
thanks for your answer. I live in Montevideo, Uruguay, and most of the countries here in South America don't have Over-the-horizon radars. I think I'm out of range of most of them, but I know the signals could bounce in the ionosphere.
Thanks for the answer!
73!
Regards,
Martin - G8JNJ
73, VR2BG.
I suspect there are also some ionospheric sounders.
However even so I can hear many of the North American ones in the UK, typically around 4MHz when Grayline propagation kicks in.
If you look on this website https://cordc.ucsd.edu/projects/mapping/maps/ and select list by frequency on the left hand side, you may be able to identify some of them.
The coast around California is particularly active, as can be seen from the main map on the title page.
Regards,
Martin - G8JNJ