18 September 1987 Balloonborne Far-Ir Spectroradiometer
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Proceedings Volume 0810, Optical Systems for Space Applications; (1987) https://doi.org/10.1117/12.941528
Event: Fourth International Symposium on Optical and Optoelectronic Applied Sciences and Engineering, 1987, The Hague, Netherlands
Pronaos, a two metre balloonborne submillimetre telescope, supported by CNES and designed by a French collaboration between CNRS institutes and CNES-CST is presented. This project is now approved and in a preliminary definition phase B. It is intended to provide a facility for long duration flights (more than 20 hours) for photometry and spectroscopy in the spectral range 80 micrometres to 1.5 millimetre. Two focal plane instrumentations are considered : 1) a multiband photometre device using He3 cooled bolometres and He4 cooled filters. 2) a submillimetre heterodyne spectrometre. The two-metre Cassegrain telescope, with a lightweight primary mirror has an equivalent focal ratio F/10. The telescope is pointed (accuracy of 5"rms) with a two stages stabilisation having a two axis sys-tem : 1) the azimuth orientation of the gondola provides from the decoupling with the balloon (ac-curacy of a few arc-minutes) and 2) an elevation/ cross-elevation gimbal.
© (1987) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
G. Serra, G. Serra, G. Bellaiche, G. Bellaiche, P. Encrenaz, P. Encrenaz, J. M. Lamarre, J. M. Lamarre, "Balloonborne Far-Ir Spectroradiometer", Proc. SPIE 0810, Optical Systems for Space Applications, (18 September 1987); doi: 10.1117/12.941528; https://doi.org/10.1117/12.941528

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