I use http://abelian.org/vlfrx-tools for everything. The program vtcmp has an option for cross-correlation, you just give it a 2-channel input. For anyone interested, details follow... I have the LF
Hi Paul, That's a relief! The phase was merrily bouncing back and forth and I was wondering what happened. All going smoothly with the clicks from the TX, the changing numbers from ebkey and CHU tone
VO1NA 2015-11-29 8K19A 2S 5C 20:00 6.2 dB 20:30 7.0 dB 21:00 3.2 dB 21:30 1.4 dB 22:00 5.4 dB 22:30 no decode 23:00 8.7 dB vtmatch monitors a stream and does a continuous cross correlation against th
I left it running overnight, and have tried a few capture files selected at random. Some produce a garbage message, with symbol errors typically 200 or so out of 512 but this one at 0200 gave a corre
The 0630 recording gave a decode too found VO1NA list rank 22 reference phase 150 150 150 150 carrier RMS 4.329e+002 noise RMS 4.617e+001 carrier S/N 19.44 dB in 976.6 uHz carrier Es/N0 -7.65 dB carr
VO1NA 2015-11-29/30 8K19A 2S 5C 20:00 6.2 dB 20:30 7.0 dB 21:00 3.2 dB 21:30 1.4 dB 22:00 5.4 dB 22:30 no decode 23:00 8.7 dB 23:30 6.8 dB 00:00 no decode 00:30 5.4 dB 01:00 4.9 dB 01:30 no decode 02
Hi Joe, moderate during the night, but strong in the morning: 2015 Nov 29/30 start Eb/N0 UT dB 2000 nil 2030 nil 2100 3.6 2130 nil 2200 nil 2230 nil 2300 nil 2330 0.2 0000 nil 0030 0.3 0100 2.5 0130
Thankyou again Markus, Paul and Andy, TX on in 5 mins. Wonder if there is a chance of a VK7 reception if QRO and longer symbols. Will try shorter symbols & QRO soon. Joe VO1NA Hi Joe, moderate dur
Hello Joe, Yes, with QRO it's possible! 73, Stefan Am 30.11.2015 20:55, schrieb [email protected]: Thankyou again Markus, Paul and Andy, TX on in 5 mins. Wonder if there is a chance of a VK7 reception if
I fixed vtmatch. I passed last night's signal through vtmatch and got a fairly decent set of spikes. I noticed a spike at 19:30 which turned out to be an un-announced VO1NA transmission which I decod
Good morning Paul and Group, Conditions were more variable yesterday with some strong peaks. Let's leave it on and see if there are any daytime decodes. Thanks Joe VO1NA VO1NA 2015-11-30/12-01 8K19A
So far, nothing decoded since 09:30 but it's worth a try. Probably for daytime we'll need longer symbols, which will be a good test for your VK capability. -- Paul Nicholson --
Hi Markus, Paul and Stefan, The encouragement is muchly appreciated. The TX will stay on for tonight. Tomorrow I'd like to try QRO for VK before the WX takes down the RL aerial. We have a storm loomi
Is there anyone in VK equipped to receive coherent? You'll need longer symbols and therefore a longer message duration. Will the phase remain stable for long enough without a GPS lock on the oscillat
Hi Joe, May be waste of time, as possibly less than three hours of common darkness and ~ 18349 km! However. https://dl.dropboxusercontent.com/u/101251787/VO1NA/VO1NA.html 2-12-2015 09:45 UTC https://
