R. Stübi (MeteoSwiss) and H. Schill (PMOD/WRC Davos) – Daily Dobson #101 observations until 2014, Dobson #062 after. The Dobson has been fully automated since 2014. Data begin in July 1926, archived since 1990. Data through 2013 archived under previous PI (Viatte).
PMOD: Physical Meteorological Observatory in Davos (Switzerland)