Message-ID: <650A52D7A67A4A2798EFB5CC074DE85B@gnat>
From: "Alan Melia" <alan.melia@btinternet.com>
To: <rsgb_lf_group@blacksheep.org>
References: <0MNdxu-1Zl3vu0oLy-007AvH@mail.gmx.com> <5603CC31.2000401@posteo.de> <560508B4.6000303@posteo.de> <258E2E67F0754FC2B833F8C44E2EA246@White> <56080126.2050308@charter.net> <06070BD781874171BA8119364F7CFF48@gnat> <006701d0f981$8a5ca850$6401a8c0@JAYDELL>
Date: Mon, 28 Sep 2015 09:50:33 +0100
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Subject: Re: LF: First MF TA since a longer time
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Status: O

Hi Jay thanks for that observation. That iswhat I had believed but wanted to 
be certain. There is obviously a "coast effect" at Dave's, probably similat 
to Joe VO1NA, though he is closer to Europe too which complicates the 
"thinking".

Best Wishes
Alan
G3NYK
----- Original Message ----- 
From: <jrusgrove@comcast.net>
To: <rsgb_lf_group@blacksheep.org>
Sent: Monday, September 28, 2015 1:06 AM
Subject: Re: LF: First MF TA since a longer time


> Alan
>
> Note that reception here is never better than at Dave's with his ocean 
> front location. During optimum conditions (for me) I can get close to his 
> displayed s/n receptions. Many times I just have no reception at all.
>
> Jay W1VD  WD2XNS  WE2XGR/2
>
> ----- Original Message ----- 
> From: "Alan Melia" <alan.melia@btinternet.com>
> To: <rsgb_lf_group@blacksheep.org>
> Sent: Sunday, September 27, 2015 12:22 PM
> Subject: Re: LF: First MF TA since a longer time
>
>
>> Thank you John......those details tend to confirm the comment I made to 
>> Graham. the results from different receivers are dependent on their 
>> location. This is ratherwhy I suggested that one receiving station 
>> monitoring two or more senders. It would seem that if the ground 
>> conditions are that important then variation amongst different stations, 
>> then the signals might have a portion of the wave arriving via ground 
>> scatter......effectively a form of grounnd following wave. Otherwise I 
>> cannot see that the ground coductivity would have such different effects. 
>> I am assuming that the mail mode "ground bounce" about 2000km down range 
>> from the receiver is over water in all cases??
>>
>> There is an argument that Graham made that suggests that even with one 
>> receiving station there would be similar effects at the transmitting 
>> end.....more variables demands more data :-))
>>
>> Are there instances when John 'XKA and Jay receive better signals than 
>> Dave and John 'TAG ....or are they always worse??
>>
>> The background to this is my re-analysis of my 9 months of measurements 
>> of CFH in 2003. They plainly show that good nights occur with a Dst of 
>> more than -50nT and never occur if the Dst is less than -60nT. However 
>> having a night with say (the magic :-))  ) -20nT does not guarantee good 
>> signals. Selecting nights with around -20nT I cannot find any correlation 
>> with any other parameter, and the spread is quite large......but this is 
>> all on one fixed path.  Sorry about the obsessive return to this but 
>> difficult problems are the hardest to leave. :-))
>>
>> Thanks for all your comments they are all absorbed.
>>
>> Best Wishes
>> Alan
>> G3NYK
>>
>>
>> ----- Original Message ----- 
>> From: "John Andrews" <w1tag@charter.net>
>> To: <rsgb_lf_group@blacksheep.org>
>> Sent: Sunday, September 27, 2015 3:45 PM
>> Subject: Re: LF: First MF TA since a longer time
>>
>>
>>> After one quiet night, the MF TA activity increased last night. Dave, 
>>> AA1A (WD2XSH/17) had 4 spots on DK7FC from 0124 to 0234Z, and 3 spots on 
>>> DF6NM from 0234 to 0314Z. I (W1TAG/1) had 3 spots on DK7FC from 0204 to 
>>> 0234Z, and 2 spots on DF6NM from 0254-0314Z. Jay, W1VD (WE2XGR) had no 
>>> TA spots, but good results to the west.
>>>
>>> For Alan's head-scratching, Dave lives right on the Massachusetts coast, 
>>> about 200 km south of me. His path to EU does not have the overland 
>>> component that I do in southern (inland) Maine. Jay is 330 km southwest 
>>> of me, and has a considerable overland path to EU. We all live in an 
>>> area with very poor ground conductivity. The path to John, WG2XKA in 
>>> Vermont, who is 200 km west of me, is also more difficult.
>>>
>>> Anyway, for the moment the best propagation appears to be in the 
>>> 0200-0300Z range, so if you have shut down and gone to bed by that 
>>> point, you may miss out. All of this could change in a day, however!
>>>
>>> John, W1TAG/1
>>>
>>
>>
>
>