Abstract In the field of high resolution solar physics, the french telescope THEMIS is designed to be operated at the Teide Observatory. It is a 90cm polarization-free telescope, with two 7.5m spectrographs, devoted to magnetic field measurements, in a number of simultaneous spectral line profiles. The instrument is under construction. The time schedule aims at operation during the SOHO observations. In addition to this great project, a french spectro-imaging instrument is presently working at the german VTT telescope. Using a Multichannel Subtractive Double Pass (MSDP), it provides simultaneous images in many wavelengths (typically 20), covering two line profiles. The 2D-character is very valuable for coordinated observations with space probes.
Current and planned facilities, Canary Islands—France
Advances in Space Research ; 11 , 5 ; 151-156
1991-01-01
6 pages
Article (Journal)
Electronic Resource
English
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