Return to KLUBNL.PL main page

[Top] [All Lists]

LF: RE: DK7FC in Todmorden at 2970 Hz

To: <[email protected]>
Subject: LF: RE: DK7FC in Todmorden at 2970 Hz
From: <[email protected]>
Date: Sun, 26 Mar 2017 17:04:27 -0400
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed;; s=q20161114; t=1490562280; bh=JoZu185xTq+JxEZg4bhgkS+1LWdwqoBr1HlMvC7Nt1o=; h=Received:Received:From:To:Subject:Date:Message-ID:MIME-Version: Content-Type; b=N1wAsc7pz5a8ngcc/zeb/NpwVQfALX/i4A8JqcaPWnEGO0G/q9qAdWFfsbs4WksqX gp5uCs8Ff7erg/kZT9t5DSfbJMDCb+i6P8SJWDR7XOOOcR6qC/H5DH3QLf2MJdRsEb tkrpkG/VDIiWkDrhYbjOBjIaZVcdsBAVbA+l8Ct3nt+8EAGBp2nEpnCnQNB2YHfxvm pXynLMUkft3v0coyGgC9nYOqpK9yZKFp9Y856S02L0CcJIVzvW1icmdzixoA1OxNEd tQrwZ2B06xyIWJ1yyVcTh+Qw5KmdMGi9T8Mx0+5WTF/b1MDeh/csL5tBn9ekObc5Kc Otwvd/Ig/MY+Q==
In-reply-to: <[email protected]>
References: <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
Thread-index: AQGEk4+ydSDvSCCmGQr1u7Smz8OzT6JDwTbA

Does this meet the criterion that you were thinking of in your comments March 
21st and March 22nd?


Jim AA5BW 

-----Original Message-----
From: [email protected] 
[mailto:[email protected]] On Behalf Of Paul Nicholson
Sent: Sunday, March 26, 2017 4:41 PM
To: [email protected]
Subject: LF: DK7FC in Todmorden at 2970 Hz

Stefan wrote (10th March):

 > Since 16:56 UTC  i'm running 180 mA antenna current  > on (2970 + 
 > 7/(24*3600)) Hz, i.e. on 2970.000081 Hz

After coherently stacking 13:00 to 00:00 for 9 days in a bandwidth of 25.25 uHz 
I get a clear signal at significance of around 5 sigma:

The peak has S/N 14.0 dB in 25.25uHz, which is -66 dB in
2.5kHz bandwidth.   Signal azimuth is east with the expected
phase angle between E and H antennas.

The days used were 11th to 16th plus 18th to 20th.  Attempting to include the 
17th, or 21st to 23rd reduced the S/N.
Leaving out any of the nine stacks days also reduces the S/N.

The amplitude of each daily contribution is normalised by the average power in 
a 20Hz bandwidth around the signal frequency.

No other bandwidth or daily time range produces a stronger
peak.   14:00 to 19:00 in 55.5 uHz gives about 12dB S/N.

So far, no attempt has been made to compensate for night time phase delay.

Distance is 881.2 km, approximately 8.7 wavelengths.

Paul Nicholson

<Prev in Thread] Current Thread [Next in Thread>