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#3675
Fri 06 Dec 2002 05:11:PM
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Joined: Feb 2001
Posts: 3,536
Mission Commander
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OP
Mission Commander
Joined: Feb 2001
Posts: 3,536 |
SB PROP @ ARL $ARLP050<br />ARLP050 Propagation de K7VVV<br /><br />ZCZC AP50<br />QST de W1AW <br />Propagation Forecast Bulletin 50 ARLP050<br />>From Tad Cook, K7VVV<br />Seattle, WA December 2, 2002<br />To all radio amateurs <br /><br />SB PROP ARL ARLP050<br />ARLP050 Propagation de K7VVV<br /><br />This is a short after-holiday catch-up bulletin to bring us<br />up-to-date on solar flux, sunspot and planetary A index numbers.<br />These data couldn't be covered in last week's early bulletin.<br /><br />>From the previous week, mean daily sunspot numbers dropped over 24<br />points and daily solar flux was down nearly 37 points. Average<br />planetary A index was about double, from 11.3 to 23. The numbers<br />run through last Wednesday, and geomagnetic indices have continued<br />to run unsettled to active since then. In four days we should have<br />an update for next weekend's ARRL 160 meter contest. For that event<br />contesters will want quiet geomagnetic conditions and low A indices,<br />preferably in the low single digits.<br /><br />Over the next few days solar flux is expected to rise from 155 on<br />Monday to 180 by the weekend. Planetary A index is expected to<br />continue unsettled, with values of 20, 20 and 15 for Monday through<br />Wednesday.<br /><br />I ran across a Finnish web site devoted to photographs of aurora<br />borealis at http://www.saunalahti.fi/~deca39/paasivu/index_eng.php3.<br />Don't miss paging through the gallery at<br /> http://www.saunalahti.fi/~deca39/galleria/index_eng.php3. These are<br />some fantastic photos taken in Finland and Lapland over the past<br />couple of years.<br /><br />Sunspot numbers for November 21 through 27 were 143, 124, 126, 123,<br />106, 100, and 112, with a mean of 119.1. 10.7 cm flux was 150.9,<br />149.1, 147.5, 146.2, 136.8, 142.3, and 142.6, with a mean of 145.1.<br />Estimated planetary A indices were 50, 24, 19, 16, 17, 14, and 21,<br />with a mean of 23.<br />NNNN<br />/EX
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