I don't think that's a TACAMO aircraft, at least, not performing
like the ones we pick up from time to time on 17.8kHz.

Here's a plot of the phase of a recent one

 http://abelian.org/vlf/tmp/x178.140225a.png

It is obviously in quite a nice circular orbit, and a tight one
too - so that the trailing wire antenna hangs mostly vertical.

Calculated from the phase: speed 228km/hour, orbit radius 1.17km.

On occasions we've got a rough position by trilateration of arrival
times and they've always been out over the Atlantic, not far off the
east coast.   I guess that's where you'd want to be in case you had
to cut the antenna loose.

> A pair of Moose attacked my new VLF loop overnight

Here, sheep and cows.  I'm quite glad I don't have to deal
with Moose!
--
Paul Nicholson
--