Hello Alex, VLF,
Wow, Eb/N0 = 6.5 dB and that's a big signal! Very well and thanks for
the detection and doing the efforts on your side. We now see that a
call sign or longer transmission is in reach!! :-)
Forget the last night transmission. Something was wrong, the results
seem to be rubbish, even here on the local recording from the tree...
Am 15.02.2017 17:21, schrieb [email protected]:
Hello
Stefan, VLF,
1) excellent decode of 13 feb 20:40 UTC transmission with rank=0 !!
(ebnaut txt file taked from GBZ-synchronized PC)
Oh, you were lucky, a single sample loss would most likely have lead to
no decode. Was there a decode on from the second PC running at PPS+NMEA?
found 73
list rank 0
reference phase 180 180 180 180
carrier RMS 7.896e-004 noise RMS
1.034e-004
carrier S/N 17.66 dB in 32.6
uHz
carrier Es/N0 -12.45 dB
carrier Eb/N0 7.09 dB
info bit period 2694.74 seconds
symbol error rate 385/1024 = 37.598 %
Es/N0 from symbol errors -13.0 dB
Eb/N0 from symbol errors 6.5 dB
Shannon capacity 9.6 bits/hour
Shannon efficiency 13.9 %
symbols file
C:\EbNaut\EbNaut14_FEB_0302_8270-symbols.csv
elapsed 37 seconds
---------------------------------------------
found 73
list rank 0
reference phase -150 180 180 150
carrier RMS 7.922e-004 noise RMS
1.034e-004
carrier S/N 17.68 dB in 32.6 uHz
Based on 17.68 dB in 32.6 uHz it should be well realistic to try:
f = 8270.100000 Hz
Start time: 15.Feb.2017 20:10:00 UTC
Symbol period: 60 s
Characters: 5
CRC bits: 16
Coding 8K19A
Duration: 8h, 32m, 0s (same duration as the last messages)
Antenna current: 700 mA
Good luck!
73, Stefan
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