Down to one spot last night Paul ?
~~ 02:50 looks to be a good slot , strongest yet, but nothing before or
after, change in the space weather may be ?
73-G,
2017-04-15 02:55:21 2E0ILY IO82QV N1BUG FN55MF 4.730 136 -36
Op32_||||_~36dB
Story so far
2017-04-15 02:55:21 2E0ILY IO82QV N1BUG FN55MF 4.730 136 -36
Op32_||||_~36dB 2017-04-14
07:45:23 2E0ILY IO82QV N1BUG FN55MF 4.730 136 -44 Op32__~44dB 2017-04-14
06:55:23 2E0ILY IO82QV N1BUG FN55MF 4.730 136 -37 Op32_||_~37dB 2017-04-14
06:05:22 2E0ILY IO82QV N1BUG FN55MF 4.730 136 -39 Op32__~39dB 2017-04-14
05:15:21 2E0ILY IO82QV N1BUG FN55MF 4.730 136 -37 Op32_||_~37dB 2017-04-14
03:35:22 2E0ILY IO82QV N1BUG FN55MF 4.730 136 -38 Op32__~38dB 2017-04-14
03:35:21 2E0ILY IO82QV N1BUG FN55MF 4.730 136 -43 Op32__~43dB 2017-04-14
02:45:21 2E0ILY IO82QV N1BUG FN55MF 4.730 136 -38 Op32__~38dB 2017-04-12
06:48:30 DF2JP AA N1BUG FN55MF 0 136 -40 Op32__~40dB 2017-04-10
03:05:23 2E0ILY IO82QV N1BUG FN55MF 4.730 136 -44 Op32__~44dB 2017-04-10
02:33:31 DF2JP JO31HH N1BUG FN55MF 5.383 136 -39 Op32__~39dB 2017-04-10
02:05:22 2E0ILY IO82QV N1BUG FN55MF 4.730 136 -41 Op32__~41dB
--------------------------------------------------
From: "N1BUG" <[email protected]>
Sent: Friday, April 14, 2017 12:29 PM
To: <[email protected]>
Subject: Re: LF: 136 OP32 LAST 24HR
Thanks for the additional explanations Graham. That helps clarify things
for me.
I had five full decodes of 2E0ILY last night with no more than 5% fade on
the worse of them. Looks like Opera is going to keep the trans-Atlantic
season going for a while.
73 Paul
On 04/13/2017 12:14 PM, Graham wrote:
Thanks Paul,
Yes , that's a full decode , -40 is round the switch over point ,
The % fade is the amount of lost 'bits' along the time line ,
the
graphic , simply shows , 'where' the bits where 'lost'
A decode or Dynamic spot may be achieved with a loss up to approx
60%
of the data , either randomly , or in block's along the time line .
The displayed s/n is the average over the Tx period , as is the
Frequency [ recovered audio] average of the Tx
Using Manchester coding , There are no synch requirements , each
bit
contains ''data and sync'' , so its impossible for the system to
loose lock, ie, any bit that is recovered is usable , so interim's
of
static / noise , the duration of the Tx pulse compared to the noise
bursts is 'very long' , this coupled with tailored dsp routines ,
provides
good performance on the lower bands , as dose the 'dispersed'
decoder
version , deployed at VHF , which provides immunity to Doppler , Luis
EA5DOM , used the Op1 [ 60 second ] to achieve EME on 23 cm , with
round 50% data loss ,
73-Graham
G0NBD
--
Paul
N1BUG 160m-2m DXCC Honor Roll
WI2XTC 2200m-630m Experimental license
FN55mf ME Piscataquis County
http://www.n1bug.com
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