Hi Paul, Markus, Group,
The level of expertise on this group is humbling and these results are
amazing. The carrier was generated with an undisciplined 10 MHz DOCXO
clocking an ad9851. As Markus points out, the maths puts it high by
92.5 uHz. Paul reported a positive offset of 46.3 and the difference can
be explained by a -5.6 ppb error in the reference oscillator. This is
consistent with Paul's and Markus' earlier measurements of the 2200m
signals being low by a few ppb. It looks like the sigs made it across
the pond and we can now start thinking about some EbNaut on VLF.
The agreement between Paul's observed and the modelled 0.07fT field
strengths is remarkable. The ERP estimate seems to have been a good
guess!
TX will remain on and phase coherent, pending arcs and ice.
73 and thank-you!
Joe VO1NA
On Mon, 8 May 2017, Paul Nicholson wrote:
First TA calibration of a TX antenna current meter with LWPC
Daytime signal is measuring 0.04 fT 08:00 to 11:00 which also
agrees with LWPC.
If this is VO1NA, we should get a good result if Joe is able to
keep the transmitter going and phase-stable until 20:00 UT.
--
Paul Nicholson
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