Re: VLF: EbNaut transmissions on lower frequencies?, pre-tests: 6.47kHz

[Paul Nicholson <vlf0403@abelian.org>]

Stefan wrote:

> 6 UTC, a carrier starts on 6470.005 Hz, taking 48 hours.

 http://abelian.org/vlf/tmp/161118a.gif

S/N averaging -68.5 dB in 2500Hz, noisier than recent
daytime tests.  Snowing much of the day here and lots of
noise on the E-field antenna.

> A test for RN3AUS and IK1QFK and all those taking part in
> the background.

LWPC predicts the signal in Moscow to be around 48dB below
1uV/m, 3dB stronger at night.  Long overland path, over 2000km
so plenty of attenuation.

Cumiana lost its internet connection last night so no final
overnight 'TEST' result from there.  Back on since 14:33 today.

Final results of the 'TEST' messages.

Todmorden 881.8 km
------------------

 Day test      Eb/N0    S/N   Phase  RMS
 2016-11-11     3.9    -62.5  141.2  2.56
 2016-11-12     4.9    -59.7  134.3  2.01
 2016-11-13     8.5    -55.6  138.5  1.07
 2016-11-14     3.5    -61.3  136.8  2.48
 2016-11-15     1.1    -64.0  139.9  3.59
 2016-11-16     5.0    -60.8  140.8  2.45
 2016-11-17     3.4    -61.6  152.3  2.87

 11th to 12th   7.5    -57.9  137.1
 11th to 13th   9.6    -53.8  137.8
 11th to 14th  10.4    -53.1  137.6
 11th to 15th  10.7    -52.9  137.8
 11th to 16th  11.8    -52.3  138.3
 11th to 17th  11.8    -51.9  139.9

 Night test    Eb/N0    S/N   Phase  RMS
 2016-11-15    -3.0    -67.8  106.5  5.09   no decode
 2016-11-16     0.0    -65.5  118.2  4.77   'TEST
 2016-11-17    -4.1    -69.0  105.8  7.13   no decode

 15th to 16th   1.8    -63.7  113.0         'TEST'
 15th to 17th   2.5    -62.6  111.1         'TEST'

Todmorden night phase lags day by 28.8 degrees.

Cumiana 507.3 km
----------------

 Day test       Eb/N0   S/N   Phase  RMS
 2016-11-11     -1.7   -66.6   21.9  3.90  no decode
 2016-11-12     -3.7   -68.6   41.3  4.32  no decode
 2016-11-13     -7.2   -72.1   51.0  3.81  no decode
 2016-11-14     -5.2   -70.0   39.2  4.28  no decode
 2016-11-15     -5.5   -70.4   39.3  6.23  no decode
 2016-11-16     -0.4   -65.3   31.4  4.78  no decode
 2016-11-17     -2.3   -67.1   30.1  4.94  no decode

 11th + 12th     0.8  -64.6     30.4  decoded 'TEST'
 11th to 15th    2.9  -62.5     36.6  decoded 'TEST'
 11th to 16th    4.6  -60.8     34.3  decoded 'TEST'
 11th to 17th    4.9  -59.8     34.7  decoded 'TEST'

 Night test      Eb/N0  S/N    Phase  RMS
 2016-11-15      -5.0  -69.8     2.5  9.88  no decode
 2016-11-16      -4.5  -69.3     5.1  9.06  no decode
 2016-11-17      no recording
 15th + 16th     -1.7  -66.6     3.8        no decode

Cumiana night phase lags day by 30.9 degrees.

--
Paul Nicholson
--