Message-ID: <5B02BF40.7080000@posteo.de>
Date: Mon, 21 May 2018 14:44:48 +0200
From: DK7FC <selberdenken@posteo.de>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3
MIME-Version: 1.0
To: rsgb_lf_group@blacksheep.org
References: <Pine.LNX.4.64.1805172121120.30106@plato.ucs.mun.ca> <5B017AE8.3080103@posteo.de> <Pine.LNX.4.64.1805201250060.7084@plato.ucs.mun.ca> <5B02B1DB.7060503@posteo.de> <Pine.LNX.4.64.1805210955190.10095@plato.ucs.mun.ca>
In-Reply-To: <Pine.LNX.4.64.1805210955190.10095@plato.ucs.mun.ca>
Subject: Re: LF: NA VLF
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org

Hi Joe,

Pity. There was another message showing up. It was '@' but i had doubts 
although the Eb/N0 was shown higher.

Now i'm back on the N-S antenna for Riccardos transmission. We can try 
again in some days.

You see i need two antennas on the tree, or better 3!

Thanks for the experiment.

73, Stefan


Am 21.05.2018 14:34, schrieb jcraig@mun.ca:
> 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
>>>>>
>>>>
>>>
>>
>>
>