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| To: | [email protected] |
|---|---|
| Subject: | LF: The Sun on Loran |
| From: | [email protected] |
| Date: | Sun, 17 Dec 2006 06:06:28 EST |
| Delivered-to: | [email protected] |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
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Dear LF group, the recent bursts of solar activity have also left their footprints on 100 kHz propagation. http://freenet-homepage.de/df6nm/LoranView/LoranView_2006.htm now has links to the November and December monitoring results, side by side with solar x-ray flux plots from the Space Environment Center archive http://www.sec.noaa.gov/ftpmenu/plots.html . The Loran-C data are presented at half size. By postprocessing the original bitmaps, quantitative data like fieldstrength or phase plots with 5 minute / 44 µs resolution can be generated here. Generally, all C-class or stronger x-ray flares impress phase and amplitude transients on signals travelling on sunlit paths - nice examples are Dec 5, 9 and 14. One extraordinary event took place on Dec 13 03:00 UT, when nighttime propagation on northern paths was suddenly and deeply affected. It was presumably caused by a burst of high energy protons, impacting into the polar region about half an hour after the X3 flare. 73 and best wishes Markus, DF6NM |
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