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Author Topic: Getting the Damn CODAR Off 60 Meters  (Read 1645 times)
K0OD
Member

Posts: 2591




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« on: May 26, 2011, 02:33:48 PM »

I've received this from several sources today. CODAR is that loud swishing sound (30 kHz wide!)  one hears on several (of just 5) 60 meter channels. I know ham use is secondary on 60 but I don't think CODAR (which isn't gov't) should be allowed to rip up a good chunk of spectrum. I hear it loud 800 miles from any ocean. Surely it can be heard overseas.

This woodpecker-like garbage is a terrible precedent. Belongs in the Soviet Union. 60 today, maybe 20 or 40 tomorrow.


-------------------
"60 Meter CODAR Interference - documentation needed - URGENT and IMPORTANT-

All 60 Meter users & listeners,

Recently it has been brought to my attention that a Wave Measurement
Radar System, (CODAR), is causing interference to 60 Meter channels 3
and 4. These systems are deployed in coastal areas and some of them
are operating on or near 5.365 MHz. This is a swept carrier radar
system and the resulting sweep passes through the 60M channels."

(more)
 
http://soara.org/60m.txt
« Last Edit: May 26, 2011, 09:21:51 PM by K0OD » Logged
N1UK
Member

Posts: 1589




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« Reply #1 on: May 26, 2011, 03:14:08 PM »

Is that the noise that appears on 40m every so often?

Mark N1UK
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K0OD
Member

Posts: 2591




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« Reply #2 on: May 26, 2011, 03:39:55 PM »

Quote
"Coastal Ocean Dynamics Applications Radar (CODAR) describes a type of compact High Frequency (HF) RADAR developed between 1973 and 1983 at NOAA's Wave Propagation Laboratory in Boulder, Colorado. CODAR utilizes HF surface wave propagation to remotely measure ocean surface waves and currents."

I've heard CODAR well outside 60 meters, down around 4.5 mHz as I recall.  I've watched it on my Flex-5000 panadapter where I see it sweeping up and down over a range of about 15 kHz.  Each sweep takes one or two seconds. Very hard to work thru it. It seems to be getting worse and worse on 60. Listen anytime and I think you'll hear it.

I don't know about 40. Wouldn't surprise me.

More info on CODAR, the New Woodpecker,

http://www.codar.com/
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K0OD
Member

Posts: 2591




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« Reply #3 on: May 26, 2011, 03:48:45 PM »

Here is a Youtube video of CODAR on 4775.00  mHz
http://www.youtube.com/watch?v=MoeDKobVEMg

and on 4435.0
http://www.youtube.com/watch?v=zupfLO1PjrA
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