Hello Joe,
I think i've got your message. But it is very weak, quite close to the
limit. The message is 'T', right?
From: vtcat -T2018-05-20_23:00,+7h Joe1ch.vt | vtraw -oa | ./iqnorm2 |
ebnaut -dp16K23A -N1 -S30 -k21 -c4 -r1 -L534849 -PS -f9 -v
i got as the best result:
phase 58 150 120 120 90
found rank 223512 ber 4.4898e-01 Eb/N0 0.6 M -3.561031494e+02 ph 58
150,120,120,90 [T]
carrier phase: 17.6 deg
carrier Eb/N0: 0.2 dB
carrier Es/N0: -21.21 dB
carrier S/N: 7.73 dB in 42.5 uHz, -35.98 dB in 1Hz, -69.96 dB in 2.5kHz
73, Stefan
Am 20.05.2018 17:33, schrieb [email protected]:
Hi Stefan and thank-you for the encouraging report. At the moment, all
is set (I hope!) for:
One character, 8.2700075 kHz,
2300, 1100 utc, 16K23A, CRC-21,
784 symbols, 30 seconds
It will take some time to change to the settings you suggested -- we can
try this after.
73 and tnx agn
Joe
On Sun, 20 May 2018, DK7FC wrote:
Hello Joe,
I searched for your last nights carrier in my recordings and found an
impressive SNR, totally unexpected for this time in the year. See
attachment.
The carrier reaches 10.97 dB S/N in 39.7 uHz when starting at 23 UTC.
This would easily decode a 1 char message.
I remember we tried some weeks ago without success, even when
stacking several days or nights.
Do we want to try again to detect a 1 char message?
Based on the last nights results i would suggest: 1 char, 16K21A,
CRC26, Start 23:00 UTC, 30 sec symbols
HW? :-)
73, Stefan
Am 18.05.2018 01:54, schrieb [email protected]:
Hello VLF
The TX is QRV 8270.0075 Hz 10 uW ERP unmodulated carrier.
73
Joe VO1NA
|
