Dex wrote:
> 8269.9 kHz
> repeat message
> 3 chars 16K21A CRC20
> 30 second symbols
> Start 22:30 UT
Results from nine repeats. The last night (07/08) was a poor S/N
at Warsaw, reducing the stack from +0.3 dB to -0.1 dB. There was
a modification to Jacek's receiver on the 7th. Did that change
the phase or reduce S/N? No way to tell. It was not the worst
reception at Warsaw, where the S/N appears to vary by 10dB or more
from one night to another. Considering the dB or so lost in the
vorbis link, the stack might well decode if extracted from local
raw storage. If so it would be a new distance record.
Hawley, Forest, and Todmorden were able to decode every night.
That's a pretty solid broadcast over 97 degrees of longitude
and 20 degrees of latitude.
An epic transmission which will surely inspire the construction
of a few more coherent receivers in North America.
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*
01/02 No transmission
02/03 Eb/N0 +4.2 dB, S/N -27.9 dB/1Hz, phase -16.3 *Decoded*
03/04 No transmission
04/05 No transmission
05/06 Eb/N0 +10.3 dB, S/N -21.9 dB/1Hz, phase -4.2 *Decoded*
06/07 Eb/N0 +11.1 dB, S/N -21.0 dB/1Hz, phase +5.2 *Decoded*
07/08 Eb/N0 +5.6 dB, H-field only, phase -6.5 *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;
01/02 No transmission
02/03 Eb/N0 -5.4 dB, S/N -37.5 dB/1Hz, phase 176.0;
03/04 No transmission
04/05 No transmission
05/06 Eb/N0 -4.7 dB, S/N -36.8 dB/1Hz, phase -178.5;
06/07 Eb/N0 -0.2 dB, S/N -32.3 dB/1Hz, phase -132.7 *Decoded*
07/08 Eb/N0 0.0 dB, S/N -32.1 dB/1Hz, phase -132.0 *Decoded*
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;
01/02 No transmission
02/03 Eb/N0 -5.8 dB, S/N -37.9 dB/1Hz, phase -13.9;
03/04 No transmission
04/05 No transmission
05/06 Eb/N0 -2.6 dB, S/N -34.7 dB/1Hz, phase -35.4;
06/07 Eb/N0 -2.9 dB, S/N -35.0 dB/1Hz, phase -1.1;
07/08 Eb/N0 -13.9 dB, S/N -46.0 dB/1Hz, phase -113.8;
All stacked after tx phase correction: Eb/N0 -0.1 dB;
Close to a decode after the night before but a poor
night has moved it further away.
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;
01/02 No transmission
02/03 No data from rx site, ADSL fault;
03/04 No transmission
04/05 No transmission
05/06 Eb/N0 -2.2 dB, S/N -34.3 dB/1Hz, phase -8.4;
06/07 Eb/N0 -6.1 dB, S/N -38.3 dB/1Hz, phase -47.0;
07/08 Eb/N0 -3.1 dB, S/N -35.2 dB/1Hz, phase -35.3;
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*
01/02 No transmission
02/03 Eb/N0 4.0 dB, S/N -28.1 dB/1Hz, phase 10.9 *Decoded*
03/04 No transmission
04/05 No transmission
05/06 Eb/N0 5.3 dB, S/N -26.9 dB/1Hz, phase 28.1 *Decoded*
06/07 Eb/N0 5.6 dB, S/N -26.5 dB/1Hz, phase 54.1 *Decoded*
07/08 Eb/N0 4.0 dB, S/N -28.1 dN/1Hz, phase 30.9 *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*
01/02 No transmission
02/03 Eb/N0 18.5 dB, S/N -13.6 dB/1Hz, phase -140.2 *Decoded*
03/04 No transmission
04/05 No transmission
05/06 Eb/N0 21.4 dB, S/N -10.7 dB/1Hz, phase -159.5 *Decoded*
06/07 Eb/N0 22.9 dB, S/N -9.3 dB/1Hz, phase 166.9 *Decoded*
07/08 Eb/N0 21.1 dB, S/N -11.0 dB/1Hz, phase -172.0 *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: +103 deg
02/03: +245 deg
05/06: +245 deg
06/07: +245 deg
07/08: +245 deg
--
Paul Nicholson
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