Re: VLF: TA east to west?

[Markus Vester <markusvester@aol.com>]

Hi Paul,

> If it does decode, then the chance of it being the correct decode from random noise is 0.02 %

If you make the list long enough such that you always get an output (right or false), wouldn't the chance for a false positive not be 1 out of 52, or 1.9 %? 

73, Markus

-----Ursprüngliche Mitteilung-----
Von: Paul Nicholson <vlf0403@abelian.org>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Cc: Michael Smith <mike@unixnut.net>
Verschickt: Do, 7. Dez 2017 22:02
Betreff: Re: VLF: TA east to west?

Stefan wrote:

> Today i'd like to try that first east to west VLF TA
> transmission. Let's try:

> f = 17470.1000 Hz
> Start time: 07.Dec.2017 22:00:00 UTC
> Symbol period: 60 s
> Characters: 1
> CRC bits: 6
> Coding 16K21A

That may decode in one attempt if lucky, but likely two
transmissions will be needed. If it does decode, then
the chance of it being the correct decode from random
noise is 0.02 %.

Can you run until 08:08 UT with CRC 12 and the other
settings the same? A gain of 0.74 dB which will make
a good difference. And if it decodes, the chance of
a random correct decode is only 0.0004 %.

I hope the weather doesn't spoil the transmission, but
if you keep trying, you are sure to succeed.

--
Paul Nicholson
--