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|    Message 1,249 of 3,036    |
|    mark lewis to all    |
|    ARLP006 Propagation de K7RA    |
|    07 Feb 14 19:12:28    |
      SB PROP @ ARL $ARLP006       ARLP006 Propagation de K7RA              ZCZC AP06       QST de W1AW       Propagation Forecast Bulletin 6 ARLP006       > From Tad Cook, K7RA       Seattle, WA February 7, 2014       To all radio amateurs              SB PROP ARL ARLP006       ARLP006 Propagation de K7RA              Solar activity surged this week, with average daily sunspot numbers       increasing nearly 55 points from 101.4 to 156.3. Average daily solar       flux rose nearly 38 points from 142.9 to 180.4. These increases       compare the recent period, January 30 through February 5, with the       previous seven days.              Geomagnetic indices remained quiet. So quiet, in fact, that on       February 4 the high latitude college A index near Fairbanks, Alaska       was 0, because each of the 3-hour K index readings that day were 0.       The same thing happened back on January 19.              Geomagnetic numbers will increase this weekend, with planetary A       index predicted to be 5, 15, 10 and 8 on February 7-10, followed by       5 on February 11-16, 8 on February 17-18, 5 on February 19-24, then       8 on February 25, then 5 February 26 through March 1, and 12 on       March 2.              Solar flux should be strong, with values of 190, 185, 180, 170 and       160 on February 7-11, 155 on February 12-13, followed by 135, 130       and 140 on February 14-16, and 145 on February 17-22. Solar flux is       expected to gradually climb to 200 on March 1, drop slightly, then       peak at 210 on March 5, followed by a low of 130 on March 14 and       then another rise.              OK1HH supplies us with his geomagnetic outlook, and he predicts the       geomagnetic field will be quite to active February 7-8, mostly quiet       February 9-10, quiet of February 11, mostly quite February 12, quiet       on February 13-15, quiet to unsettled February 16, quiet to active       February 17, quiet to unsettled February 18, quiet on February       19-20, quiet to unsettled February 21, quiet on February 22, quiet       to unsettled February 23, and quiet to active February 24-25.              Let us now review the recent averages, to see where solar activity       has been and perhaps where it is headed.              The average daily sunspot number for the month of January 2014 was       126, the highest it has been since October-November 2013 when it was       127.2 and 125.7. Prior to that, the most recent date it was higher       was way back in 2003, when the average daily sunspot number was       132.8 in July, and 150 in January.              We track a 3-month moving average for sunspot numbers, and the       averages for the three months ending in September (2013), October,       November, December and January (2014) were 77.4, 91.2, 102.9, 123.7       and 123.3. The last previous 3-month average that was a high as       recent numbers was 128.9 ending in February 2003.              Looking over the numbers for the past few years to determine if       there was a double peak shows us high average sunspot numbers at the       most recent period, 123.7 and 123.3 ending in December 2013 and       January 2014, then 106.4 on both 3-month periods ending May and June       2013, then 118.8 and 118.6 ending in November and December 2012.       This suggests that our second peak for Cycle 24 is the highest,       although how that other peak (May-June 2013) will figure into a       12-month smoothed sunspot number is anybody's guess.              Last week's Propagation Forecast Bulletin ARLP005 mentioned       something amiss with some of the recent solar flux and planetary 45       day forecasts from USAF/NOAA. I emailed my spreadsheets of archives       for both predictions to a ham contact at NOAA, and they also saw the       problem. Apparently on some days the prediction from two days prior       was reported instead of the latest one, due to some software       problem. They are working on a solution, and updating the past       records as needed.              Randy Crews, W7TJ of Spokane, Washington wrote: "Due to the large       size and magnetic complexity of sunspots now, January of 2014 set       not only a new solar flux high and sunspot number (237 and 245,       respectively) as you pointed out in an earlier article, but also       exceeded the November 2011 average solar flux value of 153 to       approximately 157. Size does matter! It looks as if we are seeing a       nice carryover into February, however the overall trend and strength       of this cycle will still be a low one. Typically we see big flux       fireworks at the top of the cycle, and this one seems to be       following suit. Recently there was an article on QRZ.com by a solar       science astronomer in Arizona who recapped the trend in sunspot       strength as on the decline. Bottom line: Take advantage of the great       conditions while they last!"              K7RA heartily agrees.              Phil Plait's blog on Slate.com highlights a big sunspot, which he       calls "ridiculously huge." Check it out at       http://www.slate.com/blogs/bad_astronomy/2014/02/04/sunspot_ar19       7_huge_sunspot _cluster_rotates_back_into_view.html       .              Mick, W3FJ of Williamsport, Pennsylvania wrote on January 31: "Just       a quick note to mention a brief opening this morning from about       1520Z to 1630Z when I had to leave for an appointment. 6 Meters was       open to a rather narrow area from my FN11 QTH in North Central PA       into Georgia and Alabama. I worked N3HJX, KG4YTP, and W4VAS all in       EM84 with good solid 59 signals. I also had a rather long QSO with       my old friend Burt, WA4VUT in EM50 in Alabama. Burt was consistently       59+ during our 10 to 15 minute QSO. Burt has been around the band       for many years and at age 87 sure doesn't look like he's going to       give it up soon."              The ARRL DX Bulletin       (http://www.arrl.org/w1aw-bulletins-archive/ARLD006/2014) reports       that the CQ World Wide WPX RTTY Contest is this weekend, running       from 0000 UTC Saturday, February 8 until 2359 UTC Sunday, February       9. In case that isn't clear, on the West Coast of North America (in       Pacific Standard Time) that would be 4:00 PM tonight (Friday,       February 7, 2014) through 3:59 PM PST Sunday, February 9. See       details at http://www.cqwpxrtty.com/ . The site has a nice countdown       time.              And finally, I was visiting a rural library in a county north of me       and noticed a listing in their catalog for "The Radio Amateur's       Handbook." But the curious thing about it was that the record did       not list a publication date or edition number (now titled the "ARRL       Handbook," the 2014 copy is the ninety-first edition), and the       subtitle was "A Manual of Amateur Short Wave Radiotelegraphic       Communication."              I ordered it, and when it came in, I thought it must be a       reproduction, because it was in perfect condition, with all the       pages bright and white, no fading at all. It turned out to be the       1926 First Edition, and I was shocked to discover a signature on the       flyleaf: "F.E. Handy" and "Personal Copy" written next to the       signature. Francis Edward Handy, W1BDI was the original editor and       creator of the handbook, and was also the Communications Manager for       many years at the ARRL. He was also the ham who dreamed up Field Day       and the ARRL Sweepstakes.              A couple of decades back I saw a classified ad in the back of QST       placed by his son, offering for sale individual copies of his       father's personal collection of handbooks. I bought several, and he       included some blank W1BDI QSL cards designed by Gil, W1CJD, the       artist who drew those classic ARRL illustrations for many years. One       of the cards shows the fellow I bought the handbooks from, as a       child, playing catch with a large glass vacuum tube, much to his       father's distress.              I seem to recall that he had this first edition for sale at the       time, but I couldn't afford it. The library got it in December 2005,       and I can only assume that the buyer or the buyer's estate donated       it to the library. I have it here, and it is quite a remarkable       find.              Chapter One is titled, "What Is An Amateur?" and the third paragraph       begins: "There is untold pleasure in two-way amateur operating. The       covering of hundreds of miles and the handling of friendly messages       with low amounts of power lends an interest not found in any other       pastime. Perhaps the relaying of messages has not been sufficiently       mentioned. That is one of the amateur's principal activities.       Friendly messages are accepted at any amateur station. They are       passed on toward their destination from one station to another. No       charge is made for the service, and of course no responsibility can       be fixed for failure to perform. Usually messages are delivered by       telephone or by the operator in person as soon as they reach the       city of destination."              Chapter Two, titled "Getting Started" begins the second paragraph       with, "To understand and enjoy radio in the fullest sense we ought       to listen to all that takes place. The broadcast listener has but       skimmed the surface of radio fun. He has no conception of the joy       that will be his, once he has put his finger on the throbbing pulse       of two-way radio. Long waves, set up by frequencies below the       broadcast band, bring us a horde of flute-like signals. Press       messages, storm warnings, and weather reports from all over the       world tell their story to whomever will listen."              This first edition is truly a remarkable book.              If you would like to make a comment or have a tip for our readers,       email the author at, k7ra@arrl.net.              For more information concerning radio propagation, see the ARRL       Technical Information Service web page at       http://arrl.org/propagation-of-rf-signals. For an explanation of the       numbers used in this bulletin, see       http://arrl.org/the-sun-the-earth-the-ionosphere. An archive of past       propagation bulletins is at       http://arrl.org/w1aw-bulletins-archive-propagation. More good       information and tutorials on propagation are at http://k9la.us/.              Monthly propagation charts between four USA regions and twelve       overseas locations are at http://arrl.org/propagation.              Instructions for starting or ending email distribution of ARRL       bulletins are at http://arrl.org/bulletins.              Sunspot numbers for January 30 through February 5 were 112, 87, 147,       163, 168, 183, and 234, with a mean of 156.3. 10.7 cm flux was       160.5, 165.7, 176.7, 189.8, 188.3, 188.1, and 193.5, with a mean of       180.4. Estimated planetary A indices were 5, 3, 5, 4, 6, 5, and 4,       with a mean of 4.6. Estimated mid-latitude A indices were 4, 2, 2,       4, 5, 4, and 5, with a mean of 3.7.       NNNN       /EX                     )\/(ark              One of the great tragedies of life is the murder of a beautiful theory by a       gang of brutal facts. --Benjamin Franklin              --- FMail/Win32 1.60        * Origin: (1:3634/12.71)    |
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