Thanks Alex, |
It looks like the 369 kB file including your mail did not come through,
so i make it available in a zip file here together with your sr file,
I reproduced the results 100%. Also i see from show_rawsyms3b that the
transmission is completely inside the FFT, so no losses...
The QRN was high during that transmission (DL-RU), thus only 14.43 dB
in 32.6 uHz.
During the last transmission (73) it was 17.66 dB in 32.6 uHz
And during the FB-message it was 11.69 dB in 32.6 uHz
It rises the question if there can be some kind of QRN forecast for
VLF. Just the global thunderstrom announcements?
FB and DL-RU was quite on the limit :-)
Let's risk something more again and try:
f = 8270.100000 Hz
Start time: Saturday 18.Feb.2017 18:00:00 UTC
Symbol period: 30 s
CRC bits: 16
Duration: 10h, 24m, 0s
Antenna current: 700 mA
PS: No transmission tonite. I keep the frequency clean for Markus and
Am 17.02.2017 13:26, schrieb [email protected]:
in the attacment are files for "tutorial of vlf ebnaut decoding
Unfortunately speclab on eeePc was restarted at morning of 15feb
because of some reasons therefore this file has minimum available
Ok, grabber is running!
Пятница, 17 февраля 2017, 14:59 +03:00 от DK7FC
Very nice! Congrats again to that result, 5 characters over such a
distance, i think is is beyond of what i've expected what's possible on
that path. :-)
A time offset of 14184 seconds. Instead of 15_FEB_2251_8270-1pps.txt
it would be interesting to try 16_FEB_0221_8270-1pps.txt where the time
offset is just 1584 seconds. It would be interesting to see if the
Eb/N0 is the same or better.
Can you provide the txt file and sr file via the reflector? There are
some OMs in the background who need something as a turorial, EbNaut
newcomers :-) The file size is small enough.
I'm planning further transmissions for the weekend...