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Date: Wed, 01 Feb 2017 00:29:03 +0100
From: DK7FC <selberdenken@posteo.de>
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Subject: ULF: Transmission announcement for 2970 Hz
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Status: RO

Hi ULF,

Since 23:25 UTC i'm running 150 mA antenna current again on 2970.000000 Hz.

If the wx permits, i'll run it for 24 hours or so...

73, Stefan

Am 30.01.2017 15:08, schrieb DK7FC:
> Hi Paul, ULF,
>
> Am 29.01.2017 18:26, schrieb Paul Nicholson:
>>
>> Stefan wrote:
>>
>> > From the known decoded EbNaut messages, what was the SNR at
>> > Renato or on your side?
>>
>> Nothing detectable here or at Cumiana so I can't answer the
>> question of how many days need stacking.  Until there is some
>> glimpse of a signal, it is completely unknown.  I can only
>> estimate a lower limit.
> Yes, we don't even know if the night could be better than the day.
>
>> Between 2016-06-26 13:00 and 2016-07-31 08:00 you transmitted
>> carrier with 30mA antenna current.  I received and stacked
>> over 34 days of carrier (about 15dB stacking gain) with no
>> sign of signal.  You estimated 100nW ERP.
>>
>> Now you can do 150mA current - about 14dB gain over July's
>> signal.  Plus, improvements here to filtering and blanking
>> may add 2 or 3dB more.
> Plus the lower QRN!
>
>> We can in two days exceed the stacked signal for the whole
>> of July.  Also with your higher ERP I can see the signal each
>> day at Bielefeld to check the phase.
> Yes, Wolf's RX is a nice feedback channel for the daily tests.
>> I think we should try some daytime carrier repeats.  Already we
>> know there is nothing after 2 days so we will need at least
>> 4 days to get a hint of signal and then at least 10 days to
>> collect enough signal for some measurements.  It is surely
>> certain that we will eventually pick up the signal after
>> enough days.
> Yes, more adding is the only way to find out what happens between QRB 
> of  3 and 5 lambda, and 8.8 lambda!
>
> I assume you have saved the data from Cumiana to add the signals that 
> i transmitted so far at 150 mA?
> That was:
> Jan, 20th, 8...20:00 UTC 2970.000 Hz
> Jan, 21th, 8...17:00 UTC 2970.000 Hz + 17...20 UTC 269.9975 Hz
> Jan, 22th, 8...14:45:20 UTC 2970.000 Hz, reconstructed carrier of 
> EbNaut (8K19A, CRC16, 7ch, 40s, message: 'F/DK7FC')
> Jan, 24th, 8... 16:00 UTC 2970.000 Hz, reconstructed carrier of EbNaut 
> (16K25A, CRC18, 3ch, 30s, message 'ULF')
> Jan, 25th, 7... 16:20 UTC, 2970.000 Hz, reconstructed carrier of 
> EbNaut (16K25A, CRC16, 5ch, 30s, message 'DK7FC')
>
> That's already 42 hours in daylight (8...17 UTC), a peak shown in 6.6 
> uHz. And there is nothing at all?
> Can we assume that Renato's RX has the full sensitivity on 2970 Hz? 
> The sferics always appear very strong. I clearly expected to see 
> Markus on 8270 Hz in JN38OO, even with my resonated antenna, because 
> the sferics still looked so strong. But there was not a trace at all! 
> It is hard to imagine that Wolf can decode the messages 'easily' and 
> Renato can't seea faint peak. But maybe, that's how it is. I should do 
> a holiday weekend again, in 4 lambda distance...
>
> If the wx permits, i will run a carrier tomorrow on 2970.000 Hz 
> between 8...17 UTC.
>
> 73, Stefan
>
>