Re: LF: 8269.9 kHz EbNaut 31/12/17

[Paul Nicholson <vlf0403@abelian.org>]

Dex wrote:

> Repeat number 5

> 8269.9 kHz
> repeat message
> 3 chars 16K21A CRC20
> 30 second symbols
> Start 22:30 UT

Todmorden (6194.2 km)
---------------------

 27/28 Eb/N0  +9.2 dB, S/N -22.9 dB/1Hz, phase -140.9 *Decoded*
 28/29 Eb/N0  +5.4 dB, S/N -26.7 dB/1Hz, phase  108.7 *Decoded*
 29/30 Eb/N0 +10.2 dB, S/N -21.9 dB/1Hz, phase  -12.8 *Decoded*
 30/31 Eb/N0  +7.9 dB, S/N -24.2 dB/1Hz, phase  -32.4 *Decoded*
 31/01 Eb/N0  +2.9 dB, S/N -29.3 dB/1Hz, phase  115.6 *Decoded*

Bielefeld (6917.7 km)
---------------------

 27/28 Eb/N0 -2.6 dB, S/N -34.7 dB/1Hz, phase   71.2;
 28/29 Eb/N0 -2.3 dB, S/N -34.4 dB/1Hz, phase  -45.2;
 29/30 Eb/N0 -3.3 dB, S/N -35.5 dB/1Hz, phase -161.9;
 30/31 Eb/N0 +0.8 dB, S/N -31.3 dB/1Hz, phase  160.1 *Decoded*
 31/01 Eb/N0 -4.8 dB, S/N -36.9 dB/1Hz, phase  -41.2;

Warsaw (7681.3 km)
------------------

 27/28 Eb/N0  -7.4 dB, S/N -39.6 dB/1Hz, phase 143.3;
 28/29 Eb/N0 -11.5 dB, S/N -43.7 dB/1Hz, phase  85.6;
 29/30 Eb/N0  -6.8 dB, S/N -40.0 dB/1Hz, phase -46.2;
 30/31 Eb/N0 -16.5 dB, S/N -48.6 dB/1Hz;
 31/01 Eb/N0 -17.2 dB, S/N -49.3 dB/1Hz;

Cumiana (7173.4 km)
-------------------

 27/28 Eb/N0 +0.6 dB, S/N -31.6 dB/1Hz, phase 164.1 *Decoded*
 28/29 Eb/N0 -2.1 dB, S/N -34.2 dB/1Hz, phase  63.2;
 29/30 Eb/N0 -4.7 dB, S/N -36.9 dB/1Hz, phase -52.6;
 30/31 Eb/N0 -6.9 dB, S/N -39.0 dB/1Hz, phase -65.3;
 31/01 Eb/N0 -9.8 dB, S/N -41.9 dB/1Hz, phase 111.9;

Hawley TX (1816.2 km)
---------------------

 27/28 Eb/N0 7.8 dB, S/N -24.3 dB/1Hz, phase  -86.3 *Decoded*
 28/29 Eb/N0 1.3 dB, S/N -30.8 dB/1Hz, phase -163.5 *Decoded*
 29/30 Eb/N0 2.9 dB, S/N -29.2 db/1Hz, phase   55.0 *Decoded*
 30/31 Eb/N0 8.7 dB, S/N -23.4 dB/1Hz, phase    2.8 *Decoded*
 31/01 Eb/N0 6.5 dB, S/N -25.6 dB/1Hz, phase  151.6 *Decoded*

Forest VA (254.2 km)
--------------------

 27/28 Eb/N0 21.2 dB, S/N -10.8 dB/1Hz, phase  115.9 *Decoded*
 28/29 Eb/N0 20.4 dB, S/N -11.8 dB/1Hz, phase  -14.0 *Decoded*
 29/30 Eb/N0 19.4 dB, S/N -12.7 dB/1Hz, phase -124.1 *Decoded*
 30/31 Eb/N0 20.0 dB, S/N -12.2 dB/1Hz, phase -143.9 *Decoded*
 31/01 Eb/N0 17.6 dB, S/N -14.5 dB/1Hz, phase   12.7 *Decoded*

Phase shifts to apply before stacking
-------------------------------------

 27/28:    0 deg
 28/29: +118 deg
 29/30: +236 deg
 30/31: +260 deg
 31/01: +257 deg

No significant phase change since the night before.
It almost looks like something has been warming up
and has taken 3 or 4 days to settle down.

--
Paul Nicholson
--