3 papers
astro-ph.SR2018
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.…
astro-ph.SR2016
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…
astro-ph.SR2015
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…