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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: DK7FC <[email protected]>
Date: Wed, 27 Dec 2017 23:58:21 +0100
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8269.9 Hz.
See the bottom entries at http://abelian.org/vlf/amateur-radio/

73, Stefan

Am 27.12.2017 23:46, schrieb John Fisher:
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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