Strange, pulsating sounds.

"Macman" wrote in news:ifWdnVOu5OspPp3dRVn-
:

There still there. Now they have a reverb component to them, they kina
sound like a duck quacking. Odd thing is that they sound like mirror images
when listened to on USB versus LSB.

Strange, pulsating sounds.






--
Never say never.
Nothing is absolute.

Soliloquy wrote:

"Macman" wrote in news:ifWdnVOu5OspPp3dRVn-
:

There still there. Now they have a reverb component to them, they kina
sound like a duck quacking. Odd thing is that they sound like mirror images
when listened to on USB versus LSB.

Strange, pulsating sounds.




In ISB it is one continuous sweep from one side of the center freq to
the other. Weird!

--
Eric F. Richards

"The weird part is that I can feel productive even when I'm doomed."
- Dilbert

Macman wrote:

Strange, pulsating sounds.

That stuff has been operating around that frequency area for several
years. I'm surprised you haven't heard it before. It's an HF Ocean
Radar, which scans for surface currents, waves, and surface wind
directions can be measured through frequency analysis of the
backscattered echo from the oceansurface waves.

There are I believe, several of them operating on the East coast of the
USA, and perhaps in other areas of the world as well.

They make a mess out of 60 meters.

Steve
Holland, MI
Drake R7, R8 and R8B
"I swear by, not at, Drake receivers" ©

Thanks for that info, I wasn't aware of that.
Just happened to come across it during my dx scanning this evening.




"N8KDV" wrote in message
...


Macman wrote:

Strange, pulsating sounds.

That stuff has been operating around that frequency area for several
years. I'm surprised you haven't heard it before. It's an HF Ocean
Radar, which scans for surface currents, waves, and surface wind
directions can be measured through frequency analysis of the
backscattered echo from the oceansurface waves.

There are I believe, several of them operating on the East coast of the
USA, and perhaps in other areas of the world as well.

They make a mess out of 60 meters.

Steve
Holland, MI
Drake R7, R8 and R8B
"I swear by, not at, Drake receivers" ©

So THAT's what it really is. I had thought it was the new electric meters in
the area. They come in loud and clear on the west coast and it's really
annoying. Do you have any ability to filter them out at all ?
V
"Macman" wrote in message
...
Thanks for that info, I wasn't aware of that.
Just happened to come across it during my dx scanning this evening.




"N8KDV" wrote in message
...


Macman wrote:

Strange, pulsating sounds.

That stuff has been operating around that frequency area for several
years. I'm surprised you haven't heard it before. It's an HF Ocean
Radar, which scans for surface currents, waves, and surface wind
directions can be measured through frequency analysis of the
backscattered echo from the oceansurface waves.

There are I believe, several of them operating on the East coast of the
USA, and perhaps in other areas of the world as well.

They make a mess out of 60 meters.

Steve
Holland, MI
Drake R7, R8 and R8B
"I swear by, not at, Drake receivers" ©

"Eric F. Richards" wrote:

Soliloquy wrote:

"Macman" wrote in news:ifWdnVOu5OspPp3dRVn-
:

There still there. Now they have a reverb component to them, they kina
sound like a duck quacking. Odd thing is that they sound like mirror images
when listened to on USB versus LSB.

Strange, pulsating sounds.




In ISB it is one continuous sweep from one side of the center freq to
the other. Weird!

It's a CODAR station. It's a kind of shortwave radar. They transmitt a
sweeping HF signal, then listen for the return signal which is used to
determine ocean wave height far out to sea.


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starman wrote:

"Eric F. Richards" wrote:

Soliloquy wrote:

"Macman" wrote in news:ifWdnVOu5OspPp3dRVn-
:

There still there. Now they have a reverb component to them, they kina
sound like a duck quacking. Odd thing is that they sound like mirror images
when listened to on USB versus LSB.

Strange, pulsating sounds.




In ISB it is one continuous sweep from one side of the center freq to
the other. Weird!

It's a CODAR station. It's a kind of shortwave radar. They transmitt a
sweeping HF signal, then listen for the return signal which is used to
determine ocean wave height far out to sea.


Yeah, that was essentially said, since AFAIK there are no other OTHRs
operating these days. Putting it on a spectrum analyzer was
interesting -- the signal started at some frequency, say 4.785 + x,
and swept rapidly down to 4.785 - x. I'd be interested to know what
the sweep gains them in their imaging.

--
Eric F. Richards,
"Nature abhors a vacuum tube." -- J. R. Pierce, Bell Labs, c. 1940