What frequency? It doesn't say...
73 de VA3VVV
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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
--
