79 citations · 108 across the 4 of their papers we have counts for
5 papers
Reconstruction of the Sunspot Number Source Database and the 1947 Zurich Discontinuity
Frédéric Clette, Laure Lefèvre, Sabrina Bechet +2
The recalibration of the sunspot number series, the primary long-term record of the solar cycle, requires the recovery of the entire collection of raw sunspot counts collected by t…
Sunspot data collection of Specola Solare Ticinese in Locarno
Renzo Ramelli, Marco Cagnotti, Sergio Cortesi +2
Sunspot observations and counting are carried out at the Specola Solare Ticinese in Locarno since 1957 when it was built as an external observing station of the Zurich observatory.…
Sunspot Observations and Counting at Specola Solare Ticinese in Locarno since 1957
Sergio Cortesi, Marco Cagnotti, Michele Bianda +2
Specola Solare Ticinese is an observatory dedicated to Sunspot Number counting, which was constructed in 1957 in Locarno, Southern Switzerland, as an external observing station of…
The revised Brussels-Locarno Sunspot Number (1981-2015)
Frédéric Clette, Laure Lefèvre, Marco Cagnotti +2
In 1981, the production of the international Sunspot Number moved from the Zürich Observatory to the Royal Observatory of Belgium, marking a very important transition in the histor…
The Effect of Sunspot Weighting
Leif Svalgaard, Marco Cagnotti, Sergio Cortesi
Waldmeier in 1947 introduced a weighting (on a scale from 1 to 5) of the sunspot count made at Zurich and its auxiliary station Locarno, whereby larger spots were counted more than…