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PRESENTETION AND TREATMENT OF INFORMATION FROM COMBINED DATABASE OF SUNSPOT MAGNETIC FIELDS Miletsky E.V., Nagovitsyn Y.A. , Ivanov V.G.
Central astronomical observatory of RAS, Saint-Petersburg, Russia, solar1@gao.spb.ru Abstract We present "Combined database of sunspot magnetic fields" (http://www.gao.spb.ru /database/mfbase/gindex.html), which includes large number of material of daily sunspot magnetic field observations. This data were collected by various observatories of former USSR during many years of observations. Now the longest period of time (1957-1997) are presented by data of Pulkovo observatory. The data are located separately for every observatory and arranged in structured sections, with their structure depending on type of the presented information. Methods of operation with this information are briefly discussed. Statistical values (frequency distributions (histograms), means, standard deviations, medians and percentiles) of the sunspot magnetic field strengths for every observatory are calculated. No significant differences are found from comparison of means and standard deviations for different observatories. A test for "distribution hypothesis" showed small but significant difference from normal distribution. This work was supported by RFBR (grant No. 01-07-90289)

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. 1957- 1957- 1964- 1957- 1966. 1997 1995 1971 1966 1976 () 18326 80098 5252 2742 2602 19671995 13560 19661989 12059 134639

25% - 1900 () 75% - 2320 () () () () 2099 365 2100

1600 2200 1922 455 1900

1300 2100 1773 534 1700

1800 2400 2066 485 2100

1600 2400 2012 532 2000

1600 2200 1940 487 1900

1900 2500 2200 390 2200

1671 2302 2002 464 1986

« » , . . [2] , , , [3]. . . 1 . , ( 95%) . 1000 , , , , .


4000

Number of Sunspots

3000

Histogram of Pulkovo observatory (GAO) data (1957-1997) Total number of sunspots N=18326 Mean = 2099 Gs Standard deviation = 365 Gs Median = 2100 Gs

2000

1000

0 1000 1500 2000 2500 3000 3500 4000

Magnetic field strenth

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