Abstract The principal high-resolution telescopes of the National Solar Observatory are its two evacuated telescopes of 61-cm aperture (Kitt Peak) and 75-cm aperture (Sac Peak). The 61-cm telescope is used for making full-disk magnetograms, spectromagnetograms and λ10830 maps that show coronal holes, and is dedicated to synoptic programs. We describe the 75-cm telescope at Sac Peak. Upgrades that are underway include an adaptive mirror and fast mirror system that will feed several focal-plane instruments including the Universal Spectrograph, a new spectrograph whose detectors are CCD cameras, the Universal Birefringent Filter, a Fabry-Perot Interferometer and an Advanced Stokes Polarimeter (ASP), is being constructed at the High Altitude Observatory. Additional equipment planned for this telescope includes an improved temperature control subsystem for the entrance window, an instrument that continually measures Fried's parameter, r0, and integrating more advanced data collection systems into a computer network. The observatory is also pursuing a mirror coronagraph, which should have high resolution and which could be built in apertures larger than a meter.
High resolution telescopes at the National Solar Observatory
Advances in Space Research ; 11 , 5 ; 139-148
01.01.1991
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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