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Joe,
I should have smelled the trap ;-))
Attached is an comparison from Friday/Saturday,
showing your Opds SNR figures reported by W1VD and TF3HZ. The difference in
directivity is very large towards W1VD. Towards TF3HZ there is
a weaker and opposite trend.
Best 73,
Markus (DF6NM)
date
time
call snr
snr
W1VD TF3HZ
2013-11-02
09:37:32 VO1NA -29.7dBOp -39.5dBOp
2013-11-02 09:02:33 VO1NA -26.4dBOp
-37.2dBOp
2013-11-02 08:27:32 VO1NA -30.3dBOp -37.7dBOp
2013-11-02
07:52:30 VO1NA -31.3dBOp -36.0dBOp
2013-11-02 07:17:31 VO1NA -37.1dBOp
-33.9dBOp
2013-11-02 06:42:30 VO1NA -29.2dBOp -36.7dBOp
2013-11-02
06:07:29 VO1NA -35.8dBOp -34.3dBOp
2013-11-02 05:32:28 VO1NA -29.3dBOp
-34.0dBOp
2013-11-02 04:57:30 VO1NA < -50dBOp -37.7dBOp
2013-11-02
04:22:28 VO1NA -27.2dBOp -38.8dBOp
2013-11-02 03:47:27 VO1NA -37.5dBOp
-36.5dBOp
2013-11-02 03:12:28 VO1NA -26.9dBOp -39.4dBOp
2013-11-02
02:37:27 VO1NA -41.2dBOp -36.8dBOp
2013-11-02 02:02:26 VO1NA -33.1dBOp
-38.0dBOp
2013-11-02 01:27:25 VO1NA -38.3dBOp -37.1dBOp
2013-11-02
00:52:26 VO1NA -29.6dBOp -44.2dBOp
2013-11-02 00:17:26 VO1NA < -50dBOp
-42.4dBOp
2013-11-01 23:42:24 VO1NA -29.1dBOp -41.8dBOp
Sent: Sunday, November 03, 2013 2:00 AM
Subject: Re: LF: early T/A
Markus,
That was
brilliant, but alas it had nothing to do with time. Amidst pangs of guilt for
the deception, I confess to toggling TX antennas.
It seems the vertical
radiates better to the west than the wire but the wire is sometimes better at
lobbing photons across the pond.
I'll be very happy to buy you a pint for
your enlightening reply!
73
Joe VO1NA
On Sun, 3 Nov 2013,
Markus Vester wrote:
> Joe,
>
> I'll have a go at the
beer. But having defined the timing myself that's probably unfair
;-)
>
> Jay's SpecLab / opds starts a new 35 minute FFT slot
very 10 minutes. You are apparently repeating your sequence every 35 minutes,
with a two minute gap between 33 minute transmissions. So there are two
alternating positions relative to the receive raster, and the gap may hit either
in 3 or 4 RX slots. The whole pattern will repeat after 70 minutes (7 vertical
pixels). This is also apparent in the overlap percentage column which has
toggled between eg. 86% and 100%
>
> Best 73,
>
Markus
>
>
> From: [email protected]
> Sent: Sunday, November 03,
2013 12:58 AM
> To: [email protected]
>
Subject: Re: LF: early T/A
>
>
> Thanks Markus and all who
sent reports.
>
> The TX has been on since 2159 1 Nov utc. Jay has
captured signals during
> the daytime. A free pint for the first one
who can explain the apparent
> periodicity at 137.555 kHz in Jay's
spectra.
>
> 73
> Joe VO1NA
>
...
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