Tried a short message this morning (2 char 8K19A, 10s, start 5:00:00.3 UT, duration 1 hour + 80 sec), which decoded instantly from the DL0AO W cardioid (attached), as well as the EW earth antenna wit
That's cool Markus! What is the distance? Must be quite close to 50 km, right? Would it make sense to set up a 47 uHz or 31 uHz or whatever window looking for your signal? 73, Stefan Am 21.08.2017 14
Thanks Stefan! Distance between DF6NM and DL0AO is 48 km. Yes a slow window from your tree might possibly receive my signal on 4470, albeit marginally, with perhaps 10 to 12 dB in 31 uHz. Unfortunate
Hello Markus, VLF, Now there is a 28 uHz Spectrogram on my grabber, http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html Scroll rate is 2 hours per pixel. You can see my own carrier
Hi Stefan, no decodes from yesterday Aug, 24, likely due to the much increased QRN already in the afternoon. I also tried to combine 23rd and 24th and still found the correct decode in the list, but
Am 25.08.2017 15:25, schrieb Markus Vester: Hi Stefan, no decodes from yesterday Aug, 24, likely due to the much increased QRN already in the afternoon. I also tried to combine 23rd and 24th and stil
A poor signal today, and not detectable yesterday. Eb/N0 each day, measured by correlation with the known message: ebnaut options -f15 -f16 -M 23rd -6.2 dB 24th -16.8 dB 25th -9.2 dB The -16.8 dB on
No correct results from the 25th and 26th either. I didn't try more stacking because adding in noisy days seemed to make things worse rather than better. The best decode was the one from the 23rd alo
Daily Eb/N0: 23rd -6.2 dB 24th -16.8 dB 25th -9.2 dB 26th -10.3 dB 27th -9.8 dB Combined is -5dB but if I leave out 24th we get -3.7 dB. No other combination improves on that. I tried a 'known phase'
Still no decode, not even with known phase. Daily Eb/N0: 23rd -6.2 dB 24th -16.8 dB 25th -9.2 dB 26th -10.3 dB 27th -9.8 dB 28th -15.8 dB 29th -8.0 dB Combined -2.5 dB leaving out 24th and 28th. Yes
Hi Paul, BTW if we manage to get a decode, then it will be the (new) lowest frequency where amateurs managed to send a message from DL to UK, i.e. an international one way contact! Yesterday i saw th
Hi Stefan does EbNaut give you some kind of S/N for these frequencies??. I am interested to know whether the noise reduces with a depressed Dst index or whether the S/N is sensibly the same in the fa
Hi Alan, Am 30.08.2017 13:46, schrieb Alan Melia: Hi Stefan does EbNaut give you some kind of S/N for these frequencies?? Yes. Paul can give you (us) these values since he is the receive station :-)
Hi Stefan, nothing from 27th and 28th. Yesterday (29th) QRN was much lower. Unfortunately the DL0AO computer failed shortly before the full EbNaut export would have been completed at 20:27 UT. But we
Hi Markus, Thank you, that's interesting! The signal of 29th can't be far away from a decode. So your stacking tools seems to work well. Now the other Windows users can use it too. RN3AUS would be a
I may have some interruptions to E-field reception here - continuing to track down a 0.13 dB extra noise floor in the new rx compared with the old. Correlation of background noise is quite good, 97.6
Hi Stefan, Ah yes of course, for some reason I was not thinking of lightning ...even at this time of year ! There is always a certain amount of it within 3000km so out of area noise is irrelevant. Ke
Hello Paul, Am 30.08.2017 19:49, schrieb Paul Nicholson: I may have some interruptions to E-field reception here OK, i'll wait some days longer with the longer message, until you completed the new R
Success! Daily Eb/N0: 23rd -6.2 dB 24th -16.8 dB 25th -9.2 dB 26th -10.3 dB 27th -9.8 dB 28th -15.8 dB 29th -8.0 dB 30th -4.9 dB 31st -10.2 dB Leaving out 24th and 28th, I decode 'PEACE' at Eb/N0 = -
Hi Paul, Great, we've got it! That was harder than expected but as we can see, it's only due to the very high QRN levels during the last days. More than 10 dB difference between 28th and 30th. A last
