Sunspot Observations and Counting at Specola Solare Ticinese in Locarno Since 1957
Additional information
Authors
Type
Journal Article
Year
2016
Language
English
Abstract
Specola Solare Ticinese is an observatory dedicated to sunspot number counting. It was constructed in 1957 in Locarno, Southern Switzerland, as an external observing station of the Zurich Federal Observatory. When the responsibility of the determination of the International Sunspot Number was assumed by the Royal Observatory of Belgium in 1981, Specola Solare Ticinese was given the role of pilot station, with the aim of preserving the continuity in the counting method. We report the observing procedure and counting rules applied in Locarno.
Journal
Solar Physics
Volume
291
Start page number
3075
End page number
3080
Keywords
irsol-refereed-scientific-papers
