Date: Mon, 21 May 2018 10:04:34 -0230 (NDT)
From: jcraig@mun.ca
To: rsgb_lf_group@blacksheep.org
In-Reply-To: <5B02B1DB.7060503@posteo.de>
Message-ID: <Pine.LNX.4.64.1805210955190.10095@plato.ucs.mun.ca>
References: <Pine.LNX.4.64.1805172121120.30106@plato.ucs.mun.ca>
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 <5B02B1DB.7060503@posteo.de>
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Subject: Re: LF: NA VLF
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Hi Stefan,

Sorry, that's not it. The WX was wet last night and there was some
arcing which probably didn't help. The WX will be dry so let's
try again tonight and if that fails, we can try your settings.

Thanks for monitoring.

73
Joe

On Mon, 21 May 2018, DK7FC wrote:

> Hello Joe,
>
> I think i've got your message. But it is very weak, quite close to the limit. 
> The message is 'T', right?
>
> From: vtcat -T2018-05-20_23:00,+7h Joe1ch.vt | vtraw -oa | ./iqnorm2 | ebnaut 
> -dp16K23A -N1 -S30 -k21 -c4 -r1 -L534849 -PS -f9 -v
>
> i got as the best result:
> phase  58  150  120  120   90
> found rank 223512 ber 4.4898e-01 Eb/N0 0.6 M -3.561031494e+02 ph 58 
> 150,120,120,90 [T]
> carrier phase: 17.6 deg
> carrier Eb/N0: 0.2 dB
> carrier Es/N0: -21.21 dB
> carrier S/N: 7.73 dB in 42.5 uHz, -35.98 dB in 1Hz, -69.96 dB in 2.5kHz
>
>
> 73, Stefan
>
>
> Am 20.05.2018 17:33, schrieb jcraig@mun.ca:
>> 
>> Hi Stefan and thank-you for the encouraging report. At the moment, all
>> is set (I hope!) for:
>> 
>> One character, 8.2700075 kHz,
>>  2300, 1100 utc, 16K23A, CRC-21,
>>  784 symbols, 30 seconds
>> 
>> It will take some time to change to the settings you suggested -- we can
>> try this  after.
>> 
>> 73 and tnx agn
>> 
>> Joe
>> 
>> On Sun, 20 May 2018, DK7FC wrote:
>> 
>>> Hello Joe,
>>> 
>>> I searched for your last nights carrier in my recordings and found an 
>>> impressive SNR, totally unexpected for this time in the year. See 
>>> attachment.
>>> The carrier reaches 10.97 dB S/N in 39.7 uHz when starting at 23 UTC. This 
>>> would easily decode a 1 char message.
>>> I remember we tried some weeks ago without success, even when stacking 
>>> several days or nights.
>>> 
>>> Do we want to try again to detect a 1 char message?
>>> Based on the last nights results  i would suggest:  1 char, 16K21A, CRC26, 
>>> Start 23:00 UTC, 30 sec symbols
>>> 
>>> HW? :-)
>>> 
>>> 73, Stefan
>>> 
>>> Am 18.05.2018 01:54, schrieb jcraig@mun.ca:
>>>> 
>>>> Hello VLF
>>>> 
>>>> The TX is QRV 8270.0075 Hz 10 uW ERP unmodulated carrier.
>>>> 
>>>> 73
>>>> Joe VO1NA
>>>> 
>>> 
>> 
>
>