July 2022 (v1)
Journal article
The potential of Meudon spectroheliograph for investigating long term solar activity and variability
Observations of the chromosphere with Deslandres's spectroheliograph started at Paris Observatory in 1893 and were followed by systematic observations at Meudon since 1908. The solar collection of Ha and CaII K images is probably the longest available worldwide, with associated products such as synoptic maps and tables. Since 2018, Meudon...
Uploaded on: February 22, 2023