Message-ID: <03507C8A3CB441689A8977E6421B6140@gnat>
From: "Alan Melia" <alan.melia@btinternet.com>
To: <rsgb_lf_group@blacksheep.org>
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> <59A6B3D5.7000408@posteo.de>
Date: Wed, 30 Aug 2017 18:58:16 +0100
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Subject: Re: VLF: Carrier on 4470.005 Hz! - EbNaut test
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Hi Stefan, Ah yes of course, for some reason I was not thinking of lightning 
...even at this time of year ! There is always a certain amount of it within 
3000km so out of area noise is irrelevant.
Keep up the good (and interesting) work :-))

Alan
G3NYK

----- Original Message ----- 
From: "DK7FC" <selberdenken@posteo.de>
To: <rsgb_lf_group@blacksheep.org>
Sent: Wednesday, August 30, 2017 1:47 PM
Subject: Re: VLF: Carrier on 4470.005 Hz! - EbNaut test


> 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
>>>> -- 
>>>>
>>>
>>
>>
>