Re: LF: EbNaut at 8270.01953125

[Paul Nicholson <vlf0403@abelian.org>]

It is good to know the frequency to within 1uHz for VLF
amateur radio.   A 1uHz error amounts to a 30 degree
phase error after one day, enough to significantly
affect the stacking of repeats.  Fortunately this is
quite easy to achieve with GPS timing.

Riccardo IW4DXW wrote:

> QRG: 8270.01953125
> 3 chars
> 60 sec/sym.
> coding 16K21A
> CRC 8
> duration: 12h 16'

>  start time 18:30 UTC

Todmorden (1412.5 km)
---------------------

 05/06 Eb/N0  +9.4 dB, S/N -24.7 dB/1Hz, phase -141.8 *Decoded*
 06/07 Eb/N0 +10.7 dB, S/N -23.4 dB/1Hz, phase   99.3 *Decoded*
 07/08 Eb/N0  +7.7 dB, H-field only,     phase  178.4 *Decoded*
 08/09 Eb/N0  +5.6 dB, S/N -62.5 dB/1Hz, phase  176.2 *Decoded*

Bielefeld (845.3 km)
--------------------

 05/06 Eb/N0 -3.7 dB, S/N -37.8 dB/1Hz, phase  -30.8;
 06/07 Eb/N0 +3.5 dB, S/N -30.6 dB/1Hz, phase -163.3 *Decoded*
 07/08 Eb/N0 +4.0 dB, S/N -30.1 dB/1Hz, phase  -66.4 *Decoded*
 08/09 Eb/N0 -4.2 dB, S/N -38.4 dB/1Hz, phase  -72.8;

Cumiana (370.5 km)
------------------

 05/06 Eb/N0 -7.7 dB, S/N -41.8 dB/1Hz, phase 102.4;
 06/07 Eb/N0 +1.2 dB, S/N -32.9 dB/1Hz, phase -54.9 *Decoded*
 07/08 Eb/N0 -2.5 dB, S/N -36.6 dB/1Hz, phase  20.5;
 08/09 Eb/N0 -7.6 dB, S/N -41.8 dB/1Hz, phase 102.0;

Warsaw (1035.0 km)
------------------

 05/06 Eb/N0  -4.9 dB, S/N -39.0 dB/1Hz, phase -62.3;
 06/07 Eb/N0 -15.6 dB, S/N -49.7 dB/1Hz;
 07/08 Eb/N0  -8.7 dB, S/N -42.8 dB/1Hz, phase -63.2;
 08/09 No data from rx site, uplink off;

--
Paul Nicholson
--