2.3.1 spase://SMWG/Instrument/Meudon/Heliograph Meudon Heliograph 2020-07-01T13:22:00Z The Meudon Heliograph provides 3 images every 1.5 minute of the solar disk in the H alpha line at 3 wavelengths: line core and at 0.5 Angstroms from it on each side. A Lyot filter with a 0.5 Angstrom bandpass is used. The objective is to detect and observe solar eruptions at a high temporal cadence. spase://SMWG/Person/Jean-Marie.Malherbe GeneralContact spase://vspo/Instrument/172 spase://SMWG/Instrument/OBSPM/OBSPM Imager Meudon Heliograph 1960-01-01T00:00:00.000Z spase://SMWG/Observatory/Meudon