A comparison of BAA Solar Section white-light measurements

This paper compares the BAA white-light measurements made during Solar Cycle 24. The main purpose is to assess whether there are any differences in the recorded long-term characteristics of solar activity for observers who determine the number of groups, the sunspot number and/or the BAA quality number (based on type of group). A comparison is also performed between the International Sunspot Number and the BAA sunspot number.

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Dealing with dew

The problem of the formation of dew on astronomical equipment is one familiar to all observers in our famously damp

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