Re: LF: New OPERA OP/OPDS 2H tonight on 27.945 Dial Freq...

[Paul Nicholson <vlf0403@abelian.org>]

Amplitude and phase of WH2XBA/1 from last night

 http://abelian.org/vlf/tmp/29499_140307a.gif

Included a couple of hours before and after to show
where the noise floor is.

If the phase is anything to go by, the max path length
(minimum phase lead) occurs around 04:00 UT.  LWPC fails
to predict these smaller details of the propagation.  It
probably would if I could put in some more detailed
ionosphere model.   There's a lot of chemistry going
on in that plasma overnight - recombinations and so on
taking place with various rates.

When sending opera the transmitter is off for half the
time, therefore not so good for measurements.

Good however for signal ID.  Markus was kind enough to
run my recording through his OPDS program to produce

 2014-03-07 06:51:53 ... 0mHz -48.9dBOp 100% 19.4dB
 2014-03-07 04:40:42 ... 0mHz -51.7dBOp  95% 18.9dB
 2014-03-07 02:29:27 ... 0mHz -52.3dBOp 100% 18.5dB
 2014-03-07 00:18:11 ... 0mHz -51.5dBOp 100% 18.3dB

--
Paul Nicholson
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