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| Subject: | Re: VLF: W4DEX trans-Atlantic at 8971 Hz |
| From: | Paul Nicholson <[email protected]> |
| Date: | Sun, 08 Jun 2014 21:26:44 +0000 |
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I made spectrograms of W4DEX at 8971.1 Hz, Signal/Noise ratio http://abelian.org/vlf/tmp/w4dex_140605a.gif Amplitude http://abelian.org/vlf/tmp/w4dex_140605b.gif The amplitude scale is approximately fT. There's enough signal to send about 12 to 18 bits (2 or 3 characters) during the short night window, and maybe nearly the same again but slower over the weaker daytime path. -- Paul Nicholson -- |
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