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| Subject: | VLF: TA east to west? |
| From: | DK7FC <[email protected]> |
| Date: | Thu, 07 Dec 2017 11:34:34 +0100 |
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Hi Paul, VLF, I changed the subject of the discussion... Am 06.12.2017 22:49, schrieb Paul Nicholson: > How far could this signal travel! We are missing > RX stations everywhere! Forest, Virginia, is reporting Eb/N0 = -7.5dB on the 4 char transmission. That's -38.55 dB in 1Hz. Distance is 6817 km. That is great!! Thanks for looking on that receiver! -7.5 dB for 4 characters during a suboptimal time period, that's fantastic! We are very close to a first east-to-west VLF TA decode/detection i think.I will try to run more antenna current this evening and i will use just a 1 character message. That could work! Please, could you check how deep the last 3 character message is buried in the noise on that RX? The timing is close to optimal and just 3 characters, so the Eb/N0 could be -5.x dB? What about the other receivers on your list http://abelian.org/vlf/ There are even farer distant monitors. Maybe you know the operators and the performance of their system. Is there another one which could have a chance to decode a message. Unfortunately the SR is just 32 kS/s. With 48 kS/s we could check when the terminator of JXN and HWU appear there. So i will check when the sunset will be there by using google earth. Stacking will be required, at least for longer messages. It will be interesting how this works on sch a distance!Recommend starting a bit later, say 00:00 or 01:00, and maybe we do some stacking too? 73, Stefan -- Paul Nicholson -- |
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