Re: LF: 2200 Meter EbNaut Beacon Announcement

[Domenico IZ7SLZ <iz7slz.domenico@gmail.com>]

Hello Rob, Stefan, all

also here no decode.

Knowing the transmitted message, I have used the -f16 -M 'K3RWR_FM18QI_73'  command in ebnaut linux program to check the distance from the decode.

This morning (24-09) at 04.00 UTC i found a Carrier Eb/N0 = -8.5 dB (maximun value). So decode is really very far. I found another max on 23-09 04.00 UT (-12.5 dB) respect to the other transmissions of the same day.  04.00 UT seems to be the right time for our T/A.

Just for fun, i have tried to stack these two recordings using the procedure suggested by Paul Nicholson. By stucking these two items, i found Carrier Eb/N0 = -6.5 dB. Still far. I don't known if the process carried out by me was ok and if the stacking method is usable at LF. Maybe should be better to stack close transmissions instead of 24-hours distant.

I will wait for further transmissions to investigate on that.

73, Domenico IZ7SLZ

On Mon, 24 Sep 2018 at 16:18, DK7FC <selberdenken@posteo.de> wrote:

No decode. I tried all transmissions.

73, Stefan

Am 21.09.2018 19:16, schrieb Rob Renoud:
> Hello 2200 Meters EbNaut,
>
> I will run my EbNaut beacon on 21, 22 and 23 September from 2300 UTC to 1100 UTC this weekend as follows:
>
> Code:  8K19A
> Symbol Period:  1.5 sec
> CRC: 16
> Number of Char:  15 (K3RWR_FM18QI_73)
> Signal Bits:  992
> Duration:  1488 sec (00:24:48.00)
> Frequency:  137470.000 Hz
> TX Sequence:  2 X per hour starting on minutes 00 and 30
> Power:  1 Watt EIRP
>
> Reports and comments welcome :-)
>
> 73,
> Rob - K3RWR
> FM18qi
> “Practicing the Art of Radio”
>
>
>
>
>
>