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Date: Wed, 30 Aug 2017 14:47:17 +0200
From: DK7FC <selberdenken@posteo.de>
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References: <15e1991abae-c08-d02c@webjas-vac137.srv.aolmail.net> <59A066BA.7060608@posteo.de> <99e04e4a-b978-829d-dabe-1bd1551f9a19@abelian.org> <22e7826e-60f1-9170-397e-494ad2cab3bd@abelian.org> <b4152156-86d7-ae14-d27e-2f9b606ed55b@abelian.org> <59A6A25C.9090305@posteo.de> <385C9CB0F9B441D997EE83C8DBCC2986@gnat>
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Subject: Re: VLF: Carrier on 4470.005 Hz! - EbNaut test
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Hi Alan,

Am 30.08.2017 13:46, schrieb Alan Melia:
> Hi Stefan does EbNaut give you some kind of S/N  for these frequencies??
Yes. Paul can give you (us) these values since he is the receive station :-)
> . I am interested to know whether the noise reduces with a depressed 
> Dst index or whether the S/N is sensibly the same in the far-field.
 From my observations, the SNR is dominated by the QRN, lightning 
activity. In this frequency range, the local lightnings (< 3000 km) 
begin to play a more dominant role than on 8.27 kHz. But i'm just a band 
observer, not a paper reader...

73, Stefan
>
> Alan
> G3NYK
>
> ----- Original Message ----- From: "DK7FC" <selberdenken@posteo.de>
> To: <rsgb_lf_group@blacksheep.org>
> Sent: Wednesday, August 30, 2017 12:32 PM
> Subject: Re: VLF: Carrier on 4470.005 Hz! - EbNaut test
>
>
>> Hi Paul,
>>
>> Thanks for the interesting overview. Do you have phase informations 
>> for each day too? It was interesting to see the daily phase 
>> variations during our stacking attempts in last winter, it was the 
>> 'TEST' message from 11th to 17th November.
>>
>> BTW if we manage to get a decode, then it will be the (new) lowest 
>> frequency where amateurs managed to send a message from DL to UK, 
>> i.e. an international one way contact!
>>
>> Yesterday i saw that it will be a good day (low QRN), today looks 
>> even better, so far.
>>
>> 73, Stefan
>>
>>
>>
>> Am 29.08.2017 23:34, schrieb Paul Nicholson:
>>>
>>> Still no decode, not even with known phase.
>>>
>>> Daily Eb/N0:
>>>
>>>  23rd  -6.2 dB
>>>  24th -16.8 dB
>>>  25th  -9.2 dB
>>>  26th -10.3 dB
>>>  27th  -9.8 dB
>>>  28th -15.8 dB
>>>  29th  -8.0 dB
>>>
>>> Combined -2.5 dB leaving out 24th and 28th.
>>>
>>> > If the message would be unknown, could you still fin out that
>>> > it is better to leave the 24th out, just by checking the noise
>>> > background relative to the other days or the days where i sent
>>> > the carrier?
>>>
>>> Yes I've done that in previous tests, dropping out days with a
>>> high background.    Also dropping out one day at a time, then
>>> two.  After that there are too many permutations (each with a
>>> full phase search).
>>>
>>> -- 
>>> Paul Nicholson
>>> -- 
>>>
>>
>
>