HFU HF Underground

Loggings => Utility => Topic started by: Finman on April 29, 2018, 0125 UTC

Title: What Is That Wideband 4.5mhz - 5mhz signal??
Post by: Finman on April 29, 2018, 0125 UTC

I'm getting back into UTE dxing after being away for many years... So I'm tuning around the 4.5mhz - 5mhz area, hearing this wide band "zeewosh, zeewosh, zeewosh" at about one second intervals. Reminded me of the old OTH radar interference. What the crap is this crap??  :P :P

Title: Re: What Is That Wideband 4.5mhz - 5mhz signal??
Post by: Token on April 29, 2018, 0141 UTC

This is a radar, but not an OTHR really, although yes, it does see beyond the horizon.  This is a specialized coastal radar called CODAR.  CODAR monitors wave action and coastal ocean currents.  There are literally hundreds of CODAR installations around the world.

T!

Title: Re: What Is That Wideband 4.5mhz - 5mhz signal??
Post by: Finman on April 29, 2018, 1646 UTC

Thanks for the reply Token. Man, that sure makes a mess of a large section of spectrum.
I wonder how this could be legal with the ITU?

Quote from: Token on April 29, 2018, 0141 UTC

This is a radar, but not an OTHR really, although yes, it does see beyond the horizon.  This is a specialized coastal radar called CODAR.  CODAR monitors wave action and coastal ocean currents.  There are literally hundreds of CODAR installations around the world.

T!