To: | topband@contesting.com |
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Subject: | Topband: Correlation |
From: | Bill Tippett <btippett@alum.mit.edu> |
Date: | Mon, 08 Mar 2004 09:46:22 -0500 |
List-post: | <mailto:topband@contesting.com> |
Not to beat a dead horse on this but there is VERY strong correlation with the low flux and stable geomagnetic conditions which exist at solar cycle lows. The following data was gathered for the RM-10352 petition by K1ZM and myself. Granted, it is virtually impossible to predict 160 conditions from one day to the next, but there is very strong long-term correlation to the stage of the solar cycle. This can also be observed by looking at the year all-time DX contest records were set on 160. Current records for both modes of the CQ WW Contests were set in 1996. 73, Bill W4ZV http://users.vnet.net/btippett/rm_petition.htm Comparison of 160 m Contact Levels by US Multi-Multi Contest Entrants Over Time The matrix appearing below represents the aggregation of 160 m contact totals of the 5 top-scoring USA multi-multi entrants during 48 hours in the CQWW CW DX Contests from 1975 - 2000. A definite trendline of increasing contact totals can be seen as well as variations caused by solar cycle maxima and minima. Solar maxima present somewhat unfavorable conditions on 1.8 MHz due to increased levels of signal absorption. Solar minima offer favorable conditions for 160 m enthusiasts due to decreased absorption. The matrix indicates increasing activity levels on 160 m throughout the period with short periods of reduced activity around solar maxima. Year Contacts (Sum of Top 5 USA Multi-Multi QSO's on 160 m in CQ CW DX Tests) 1975 214 1976 300 Cycle Minimum June 1976 1977 295 1978 229 1979 235 Cycle 21 Maximum December 1979 1980 215 1981 298 1982 230 1983 407 1984 502 1985 647 1986 546 Cycle Minimum September 1986 1987 495 1988 391 1989 392 Cycle 22 Maximum June 1989 1990 523 1991 381 1992 433 1993 890 1994 781 1995 1299 1996 1474 Cycle Minimum May 1996 1997 704 1998 898 1999 996 2000 1092 Cycle 23 Maximum April 2000 _______________________________________________ Topband mailing list Topband@contesting.com http://lists.contesting.com/mailman/listinfo/topband |
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