Thanks Uwe. The late evening may not be ideal in terms of QRN background but let's try anyway. I have pushed out the antenna again (half height due to wind), and restarted the VLF grabbers with EbNau
Hello Uwe, Could you try to start a message at 7...8 UTC? 4 hours is fine. You know, the QRN... Meanwhile my GPS module NEO-6M arrived here and i got it working. It consumes 58mA at 3.3V. I'm able to
Hi Paul, Am 01.04.2016 13:51, schrieb Paul Nicholson: For 2 char messages with 16 bit CRC, the max useful list length is probably around 1k but I don't yet know where the optimum is. Beyond a certain
Hello Uwe, Well, i'm also getting the message "GL" :-) Are you sure it was not GL? ;-) No other decodes. Sorry. But we will make it soon, the situation is always improving. 73, Stefan Am 01.04.2016 1
Quite a coincidence, or maybe something more subtle. GL differs from the correct message in 186 of the 368 symbols, so it is not a near miss in terms of hamming distance. Curious. -- Paul Nicholson -
I grabbed a recording from Bielefeld via Wolf's online receiver. Got the correct message at rank 3721 Eb/N0 = -1.6 dB, BER 41.8%, there were no stronger false decodes, so that's a genuine detection a
The notion of correlated noise leading to identical false decodes is intriguing. But with our receivers being five wavelengths apart, a spatially distributed noise source (like a thunderstorm) would
The notion of correlated noise leading to identical false decodes is intriguing. But with our receivers being five wavelengths apart, a spatially distributed noise source (like a thunderstorm) would
Hi Uwe, now around 9 UT, the band appears to be much more quiet. Would you like to make another attempt? BTW Yesterday morning your carrier became invisible on Paul's spectrogram between 7 and 11 UT.
Hi Paul, that shouldn't be so... According to my favourite hex editor, I get the same result as you for Stefan's samples. But my first samples should be 698.0 1628.0 2096.01 -4322.74 1390.22 -914.946
Thanks, I see what's happening. It's the SoX utility which I use to convert the .wav to a data stream. The stupid program assumes that audio samples, even when using IEEE float formats, are restricte
Uwe, VLF, I can see DJ8WX today in the '6000' window, see attachment. I bet it will be a good decode! Now going to do a trip to the tree in nice wx here :-) 73, Stefan Attachment: 6000.jpg Descriptio
