Sunspot Number Corrections
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چکیده
Let me try to say things a bit more clearly. Reconstruction of the EUV flux is on solid ground based on the range of the diurnal variation, rY, of the Geomagnetic East Component: The process is described
منابع مشابه
Centennial variations in sunspot number, open solar flux, and streamer belt width: 2. Comparison with the geomagnetic data
We investigate the relationship between interdiurnal variation geomagnetic activity indices, IDV and IDV(1d), corrected sunspot number, RC , and the group sunspot number RG . RC uses corrections for both the “Waldmeier discontinuity,” as derived in Paper 1, and the “Wolf discontinuity” revealed by Leussu et al. (2013). We show that the simple correlation of the geomagnetic indices with RC n or ...
متن کاملHow Well Do We Know the Sunspot Number?
We show that only two adjustments are necessary to harmonize the Group Sunspot Number with the Zürich Sunspot Number. The latter being inflated from the 1940s on to the present by 20% due to weighting of sunspot counts according to size of the spots, and corrected by inflating the earlier values as well. The Group Sunspot Number before ∼1885 is too low by ∼50%. With these adjustments a single s...
متن کاملThe Differences in the Relationship between Ionospheric Critical Frequencies and Sunspot Number for Different Sunspot Cycles
Analysis of data for Washington and Watheroo indicates differences in the relationship between føF2 and sunspot number for the current and preceding sunspot cycles. The sunspot number is therefore not entirely satisfactory as an index for ionospheric variations. Consequently, ionospheric data for the current cycle only should be used in preparing ionospheric radio propagation predictions whenev...
متن کاملUpdating the Historical Sunspot Record
We review the evidence for the argument that Rudolf Wolf’s calibration of the Sunspot Number is likely to be correct and that Max Waldmeier introduced an upwards jump in the sunspot number in 1945. The combined effect of these adjustments suggests that there has been no secular change in the sunspot number since coming out of the Maunder Minimum ∼1715. 1 The Sunspot Record(s!) The Sunspot Recor...
متن کاملPower law relating 10 . 7 cm flux to sunspot number
Robert W. Johnson Alphawave Research, Atlanta, GA 30238, USA (Dated: December 26, 2009) Abstract To investigate the relation between observations of the 10.7 cm flux and the international sunspot number so that a physical unit may be ascribed to historical records, both polynomial and power law models are developed giving the sunspot number as a function of flux and vice versa. Maximum likeliho...
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تاریخ انتشار 2015