Oct 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990dres.iafcq....d&link_type=abstract
IAF, International Astronautical Congress, 41st, Dresden, Federal Republic of Germany, Oct. 6-12, 1990. 7 p.
Other
Astronomical Photometry, Balloon-Borne Instruments, Carbon Fibers, Reinforced Plastics, Submillimeter Waves, Telescopes, Thermal Stability, Actuators, Algorithms, Background Noise, Mirrors, Photons, Surface Properties
Scientific paper
The balloon borne Pronaos gondola, designed for astronomical observations in the submillimeter range, is presented. Its telescope will be completely made of carbon fiber reinforced plastic and has to meet stringent thermal-stability and mass requirements. In order to maintain a telescope surface accuracy better than 10 microns and an areal mass lower than 20 kg per sq m irrespectively of the environmental conditions, a set of six actuators, controlled by displacement sensors and a control algorithm, is used. High efficiency detectors having very low background noise and a very large photon collecting area will also be used since the radiation energy coming from 'cold universe' objects is very weak. Observations will include objects such as planets, asteroids, systems surrounding stars, planetary systems, and the dust of the solar system or other galaxies.
Buisson François
Duran Maria
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