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| To: | rsgb_lf_group@blacksheep.org |
|---|---|
| Subject: | VLF: India 16.3 kHz long path |
| From: | Markus Vester <markusvester@aol.com> |
| Date: | Sun, 15 May 2016 14:55:38 -0400 |
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| Reply-to: | rsgb_lf_group@blacksheep.org |
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Moving the zoomed section of my VLF wideband spectrogram to 16.3 kHz, I noticed the familiar interference stripes from the superposition of short and long path signals. The periodicity is about 11.8 Hz here, corresponding to 25.4 megameters path difference (7.3 Mm direct vs. 32.7 Mm long path). The same effect is visible every day on 19.8 kHz, NWC from Australia (12 vs. 28 Mm).
Best 73, Markus (DF6NM)
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