Hi EbNaut

 

I could not decode all the transmissions from Stefan. Some of them were too weak and there is no decode

Also not visible in the slow spectrogram. Notice also the signal from Markus in stronger contrast due

to the 3s per symbol BPSK modulation, slower than 1s per symbol from Stefan

 

 

So, this are my results

 

22:00 --------------

23:00  I AM DREAMING OF A WHITE CHRISTMAS Eb/N: 1.1dB

00:00 --------------

01:00 I AM DREAMING OF A WHITE CHRISTMAS Eb/N: 2.9dB

02:00 I AM DREAMING OF A WHITE CHRISTMAS  Eb/N: 4.5dB

03:00--------------

04:00--------------

05:00 I AM DREAMING OF A WHITE CHRISTMAS Eb/N: 2.2dB

 

73 de Luis

EA5DOM

 

 

 

Good idea Markus,

I just had the same idea because i found a nice message.
So i'm using the even half hours.

f = 137.540 kHz
Start time: 16.DEC.2018  22:00:00.3 UTC (8 hourly repeats)
Symbol period: 1 s
Characters: 34
CRC bits: 3
Coding 8K19A
Antenna current: 4 A
Duration: 30:00 [mm:ss]

73, Stefan



Am 16.12.2018 17:48, schrieb Markus Vester:

Tonight I intend to send a number of different EbNaut messages, commemorating a scientific experiment which ended up changing the world.

Frequency: 137542 Hz
Start times: odd half hours (plus 0.3 s extra delay), Dec 16) 23:30 to Dec 17, 6:30 UT
Format: 7 characters, 3 second symbols, 8K19A, CRC 15 (!)
Duration: 30:00 minutes
Radiated power: ~ 0.4 Watts

Best 73,
Markus (DF6NM)