Jim wrote:
> I wonder if LWPC would show the interference peak near 1500 UT;

Last time I ran it

 http://abelian.org/vlf/tmp/lwpc140301a.gif

the model did not converge from about 11:00 to 16:30 UT
but perhaps I can tweak things a bit.

When the entire path is in darkness, LWPC produces
a flat line, indicating it is using a constant model
for the nighttime ionosphere.  During day, it takes
account of solar zenith angle for each path segment
of the model.   We have some control over the path
segmentation - maybe that can be exploited to make
it converge.

The online front-end is at

 http://abelian.org/lwpc

--
Paul Nicholson
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