G8JNJ

It's Over The Horizon Radar (OTHR)

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

It's Over The Horizon Radar (OTHR)

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

It's Over The Horizon Radar (OTHR)

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

New FAX frequency for me last night that doesn't seem to be listed.


UPDATE

It's Sydney (VCO) Canada and it's in the FAX Extension list I just missed it.

Fax schedule:
1121 UTC 4416 kHz Ice analysis - Gulf of St Lawrence
1142 UTC 4416 kHz Ice Analysis East or SouthEast Newfoundlandwaters
1741 UTC 4416 kHz Ice analysis - Iceberg limit
2200 UTC 6915 kHz Ice analysis - Gulf of St. Lawrence
2331 UTC 6915 kHz Ice analysis East or SouthEast Newfoundlandwaters


Showing an ice chart for area around the Gulf of St Lawrence



Plus another odd one logged back in November, that I can't remember if I mentioned before.

GYA, 120Line Surface Prognosis chart 8083KHz USB FAX - TDoA possibly Inskip UK

Regards,

Martin - G8JNJ

Some interesting enhancements to OpenWeb RX by Jakob, DD5JFK which he seems to have forked from the original work by Andr?s, HA7ILM.

https://github.com/jketterl/openwebrx/blob/develop/README.md


Apart from the addition of wsjt-x based demodulators for FT8, FT4, WSPR, JT65, JT9

He's also added Clientside bookmarks (DX Labels or Tags) which every user can store for themselves in the browser's localStorage.

Interesting stuff.

Regards,

Martin - G8JNJ