Solar Section White Light Form

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Peter Meadows

Hi David,

The blue cells in the Solar Section white light reporting form are for the total number of groups (gn, gs, g), sunspots (fn, fs, f) or sunspot number R seen during a month.  Gn, Gs and G are the number of active area/groups seen in the northern hemisphere, southern hemisphere and the whole solar disk on each observing day respectively. If you only count the number of groups for the whole disk, then please leave the gn, gs, fn, fs columns blank.  R is 10*g + f.

The MDF values are the mean daily frequency values for gn, gs, g – i.e. these are the average number of groups during the month. Finally R in cell J43 is the average R value for the month.

Once you have completed your form, please send to Lyn Smith (