Physics – Optics
Scientific paper
Jan 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987spie..810...88s&link_type=abstract
IN: Optical systems for space applications; Proceedings of the Meeting, The Hague, Netherlands, Mar. 30-Apr. 1, 1987 (A88-35951
Physics
Optics
Balloon-Borne Instruments, Focal Plane Devices, Infrared Radiometers, Spaceborne Telescopes, Spectroradiometers, Cassegrain Optics, Far Infrared Radiation, Schottky Diodes
Scientific paper
Pronaos, a two-meter balloon-borne submillimeter telescope, is presented. This project is now approved and in a preliminary definition phase. It is intended to provide a facility for long duration flights (more than 20 hours) for photometry and spectroscopy in the spectral range 80 to 1.5 microns. Two focal plane instrumentations are considered: (1) a multiband photometer device using He-3 cooled bolometers and He-4 cooled filters; and (2) a submillimeter heterodyne spectrometer. The two-meter Cassegrain telescope, with a lightweight primary mirror, has an equivalent focal ratio F/10. The telescope is pointed with a two-stages stabilization having a two-axis system: (1) azimuth orientation of the gondola provided by the decoupling with the balloon and (2) an elevation/cross-elevation gimbal.
Bellaiche Gilbert
Encrenaz Pierre
Lamarre Jean-Michel
Serra Giampaolo
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