Yes I agree 100 % with you Mike.
Remember : in the years 1999 to 2003 there was a lot of CW
activity on LF, and daytime was the best for QSO up to 800 / 1000 km. At night,
only some more distant QSO can be acheived with the help of layer reflexion as
OH1TN... Below about 500 km on LF the level signal stay about the same on day or
night, but the noise level increase after evening, that is especially sensible
on summer, so the S/N be not so good.
Of course, that is a bit different on the MF band even My
friend F5WK at 90 km gives me about 6 to 8 db Better S/N on daytime than on
night, when I am transmitting WSPR 2 on 630 m band.
73 de Andy.
-----Message d'origine-----
From: Mike Dennison
Sent: Saturday, July 16, 2016 6:11 PM
Subject: Re: LF: G3XDV IO91VT M0DSZ IO82LS Novel s/n / time 136/op32
Well, I think the clue is in the phrase "signal to noise". The noise
level is much greater after dark than in the daytime, especially at
this time of year, so for the same signal strength the S/N is poorer
at night.
Mike, G3XDV
===========
> G3XDV IO91VT M0DSZ IO82LS Novel s/n / time
136k
>
> Signal is stronger in the Day than the
night , over 220k path
>
> Assume its sky wave subtracting from the day
time level ?
>
> 73-G,
>
>
>
> 2016-07-16 07:31:38 G3XDV
IO91VT M0DSZ IO82LS 220 136 3
>
Op32_||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
> ||||||||||||||||||||||_3dB 2016-07-16
05:51:49 G3XDV IO91VT
> M0DSZ IO82LS 220 136 2
>
Op32_||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
> ||||||||||||||||||||_2dB 2016-07-16
04:12:01 G3XDV IO91VT
> M0DSZ IO82LS 220 136 -0
>
Op32_||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
> ||||||||||||||||_0dB 2016-07-16 02:32:13
G3XDV IO91VT M0DSZ
> IO82LS 220 136 -8
>
Op32_||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
> _~8dB 2016-07-16 00:52:25 G3XDV IO91VT
M0DSZ IO82LS 220 136 -15
>
Op32_||||||||||||||||||||||||||||||||||||||||||||||_~15dB
> 2016-07-15 23:12:36 G3XDV IO91VT M0DSZ
IO82LS 220 136 -16
>
Op32_||||||||||||||||||||||||||||||||||||||||||||_~16dB
> 2016-07-15 21:32:48 G3XDV IO91VT M0DSZ
IO82LS 220 136 -15
>
Op32_||||||||||||||||||||||||||||||||||||||||||||||_~15dB
> 2016-07-15 19:51:29 G3XDV IO91VT M0DSZ
IO82LS 220 136 -18
>
Op32_||||||||||||||||||||||||||||||||||||||||_~18dB 2016-07-15
> 18:08:26 G3XDV IO91VT M0DSZ IO82LS 220
136 -11
>
Op32_||||||||||||||||||||||||||||||||||||||||||||||||||||||_~11dB
>
>
>
>
> G3XDV SM2DJK 2200m OPERA 1781 km
00:56:47
> G3XDV SP5XSB 2200m OPERA 1445 km
23:16:59
> G3XDV PA7EY 2200m OPERA 347 km
07:31:37
>
>
>
> 2016-07-15 21:32:47 G3XDV
IO91VT F5WK JN18HP 406 136 -24
> Op32_||||||||||||||||||||||||||||_~24dB
2016-07-15 19:51:28
> G3XDV IO91VT
F5WK JN18HP 406 136 -16
>
Op32_||||||||||||||||||||||||||||||||||||||||||_~17dB 2016-07-15
> 18:08:26 G3XDV IO91VT
F5WK JN18HP 406 136 -18
>
Op32_||||||||||||||||||||||||||||||||||||||_~19dB 2016-07-16
> 02:32:12 G3XDV IO91VT
EA5DOM IM98XN 1.473 136 -37 Op32__~38dB
>
>
>
>
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2016.0.7688 / Virus Database: 4627/12623 - Release
Date:
> 07/15/16
>
