[Scan-DC] 4739/4740 khz frequency information?

[David L. Wilson]

As he will probably tell you, it is a form of radar looking at the return 
from ocean waves.  It is not a communications mode. Most of the licenses put 
more than one transmitter sweeping the same frequency range.  This is why it 
may sound like data.

----- Original Message ----- 
From: "jay dehm" <dehmmy.qth at gmail.com>
To: "Scan-DC" <scan-dc at mailman.qth.net>
Sent: Friday, August 04, 2006 5:14 PM
Subject: Re: [Scan-DC] 4739/4740 khz frequency information?


> Thanks so much all for the detailed information. It was driving me
> nuts. I'm curious as to the protocol used and if there is a way to
> decode it...
>
> -jay
>
> On 8/4/06, Iain McFadyen <mcfadyenusa at yahoo.com> wrote:
>> Information received from University of MAINE:
>>
>> <Quote>
>> We are operating three Long-Range Seasonde units manufactured by Codar
>> Ocean Sensors.  We are sweeping at 1Hz, with a swept bandwidth of
>> 25.6kHz for two of our sites and 18.3kHz at the third site.  The
>> frequency that you indicate is at the lowest end of our current
>> operating range at two of our sites.
>> <Unquote>
>>
>> Iain
>> --- "David L. Wilson" <dwilson314 at adelphia.net> wrote:
>>
>> > No, this is definitely CODAR (Coastal Ocean Detection and Ranging or 
>> > COstal
>> > raDAR) and also called Seasonde.
>> >
>> > Several of these systems are in operation along the US coasts.  They 
>> > are
>> > mostly experimental licenses held by universities.
>> > An example is WA2XXF run by Rutgers Institue of Marine and Coastal 
>> > Science
>> > which uses 4525-4550 KHz.
>> >
>> > The University of Maine School of Marine sciences operates WC2XQH with 
>> > 4750
>> > one of its frequencies.  With a bandwidth of 25 kHz or wider perhaps, 
>> > it is
>> > a likely candidate.
>> >
>> > The University of North Carolina at Chapel Hill operate WD2XAX also in 
>> > the 4
>> >
>> > MHz band.
>>
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