Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

Re: LF: Re: DK7FC EbNaut message on 8270.1 Hz decoded nr Moscow by RN3AU

To: [email protected]
Subject: Re: LF: Re: DK7FC EbNaut message on 8270.1 Hz decoded nr Moscow by RN3AUS
From: Jacek Lipkowski <[email protected]>
Date: Tue, 14 Feb 2017 17:22:19 +0100 (CET)
In-reply-to: <[email protected]>
References: <[email protected]om> <[email protected]om> <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
User-agent: Alpine 2.11 (DEB 23 2013-08-11)
Nice decode here for your transmission on 13 Fen 2017 20:40

found rank 0 ber 3.0469e-01 Eb/N0 10.7 M -1.697070885e+01 [XX] ps [  0    0    
0    0    0]
carrier phase: 5.3
carrier Eb/N0: 10.9
carrier S/N: 21.44 dB in 32.6 uHz
elapsed 29

Switched the message to XX (sent to Stefan off list), so i don't spoil other's fun
VY 73

Jacek / SQ5BPF

On Tue, 14 Feb 2017, DK7FC wrote:

Date: Tue, 14 Feb 2017 11:32:14 +0100
From: DK7FC <[email protected]>
Reply-To: [email protected]
To: [email protected]
Subject: Re: LF: Re: DK7FC EbNaut message on 8270.1 Hz decoded nr Moscow by
    RN3AUS

Hi Alex, Paul, VLF,

It was a really happy moment when that decode appeared. Alex has sent me the 
txt file to reproduce
the decode, tnx. My PC took 81 minutes to pass the whole decode process. There 
was just that signle
decode, no additional false decodes or different phase combinations.
I attach the wav file, if someone wants to play with it (reproducing the 
result).

Alex' recent spectrograms have shown that the night propagation seems much 
better regarding the
obtained SNR. Last night i tried a first 2 character transmission with same 
parameters but a
different message. We will have that result in a few days i guess. I started 
the message before
knowing that the first one successfully decoded.

Now i'm a bit more optimistic and will try 3 characters next:

f = 8270.100000 Hz
Start time: 14.Feb.2017   20:00:00 UTC
Symbol period: 30 s
Characters: 3
CRC bits: 26
Coding 16K21A
Duration: 8h, 32m, 0s (same duration as the first 2 messages)
Antenna current: 700 mA

73, Stefan





Am 14.02.2017 10:35, schrieb Paul Nicholson:

      Congratulations to Alex and Stefan.   Another first
      added to the list.

      An excellent result, making good use of list decoding (list
      rank 1744086).   A good choice of settings by Stefan.

      -67.2 dB in audio bandwidth.

      Here in Todmorden, a nice decode of Stefan's 13th 20:40 message
      at +15 dB Eb/N0.   I expect you will decode that one Alex.

      --
      Paul Nicholson
      --


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