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Re: LF: RE: New world record distance by W4DEX and IK1QFK

To: <[email protected]>
Subject: Re: LF: RE: New world record distance by W4DEX and IK1QFK
From: John Fisher <[email protected]>
Date: Wed, 27 Dec 2017 22:46:44 +0000 (UTC)
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.ca; s=s2048; t=1514414808; bh=PRLzmDBZ6Xaz6BMgOHSZ86/n2SOcEPCsPv5sbweto/A=; h=Date:From:Reply-To:To:Subject:References:From:Subject; b=VvktQuFZBnhfGYegdc9BDocsrUqNp3sRJ+1tAhBo19ouoFi46g6AL7nqWy/rO71ext9M9iY+KbfXKKx1VkxCU6g2eIITkBSyCU75Fr5u72EdBhuqKhJUNwszwGaw81FCTXE7Xjl+6n6Eeqhi59DV5++CYkddTurKI2rQMqzvaHyGVFPJbgL4d+7T+LbNonmXfLDMZrV59A8HriDhWlgYQC7Exj5rVgEbNdAJ2Y9/n4dldhn7Ew7rp8VL0Obf1tf3EVzuLBZBeJH3NbUmb7u/+HtqBSyRwPuFf+Y5e6FkFStWY1AKXe+GxQAEoZUKrxHgEg0kc9f/khUGl82+J20idw==
References: <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
What frequency? It doesn't say...

73 de VA3VVV


--------------------------------------------
On Wed, 12/27/17,  <[email protected]> wrote:

 Subject: LF: RE: New world record distance by W4DEX and IK1QFK
 To: [email protected]
 Received: Wednesday, December 27, 2017, 5:11 PM
 
 Congratulations W4DEX, IK1QFK,
 Paul and all others on the new record; fine work, and
 inspiring.
 
 73,
 
 Jim AA5BW
 
 
 -----Original Message-----
 From: [email protected]
 [mailto:[email protected]]
 On Behalf Of Paul Nicholson
 Sent: Wednesday,
 December 27, 2017 2:22 AM
 To: [email protected]
 Cc: Renato Romero
 Subject: VLF:
 New world record distance by W4DEX and IK1QFK
 
 
 W4DEX
 wrote:
 
  > 3 chars 16K21A
 CRC20
  > 30 second symbols
  > Start 22:30 UT
 
 Success!
 
 Decoded 'QRZ' at Cumiana (IK1QFK)
 with
 Eb/N0 = +0.4 dB, BER 41.6%;
 
 S/N -31.7 dB in 1Hz, -65.7 dB
 in 2.5kHz
 (after sferic blanking);
 
 List rank 5689, constant
 reference phase;
 
 Distance
 is 7173.4 km which is a new world record for VLF message
 decode and a record distance for EbNaut at all bands.
 
 Predicted Eb/N0 was +0.6
 dB.
 
 Decoded via the live
 VLF stream from Renato's E-field receiver.
 
 These two stations already
 hold the record distance for carrier detection at VLF. 
 This result extends that to a message decode.
 
 Signal data available in
 vlfrx-tools format:
 
   http://78.46.38.217/w4dex-171226-vlf15.vt
 
 Decode with
 
   vtraw -oa
 w4dex-171226-vlf15.vt |
     ebnaut
 -dp16K21A -r1 -S30 -k20 -N3 -v -PU -L500000
 
 Congratulations to both
 stations for a great result.
 
 --
 Paul Nicholson
 --
 
 
 


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