Physics – Optics
Scientific paper
Feb 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jphe...17..160d&link_type=abstract
Journal of Physics E - Scientific Instruments (ISSN 0022-3735), vol. 17, Feb. 1984, p. 160-168.
Physics
Optics
6
Balloon-Borne Instruments, Cassegrain Optics, Far Infrared Radiation, Infrared Telescopes, Reflecting Telescopes, Balloon Flight, Equipment Specifications, Focusing, Infrared Stars, Instrument Orientation, Signal Processing, Telemetry
Scientific paper
A balloon-borne 750 mm Cassegrain telescope has been developed for far-infrared astronomical observations. This telescope uses a three-axis stabilized balloon platform with approximately 30 arcsec (rms) pointing accuracy. Design and overall properties of this telescope system are presented. Some of the special features of the payload are highlighted viz., cheap and lightweight mirrors made in epoxy resin; the in-flight relative phase adjustment facility between the detector signal processing system and the secondary mirror chopper. This telescope was flown at an altitude of 32 km on December 10, 1980 for conducting far-infrared observations. The telescope flight details and performance are presented and compared with the design goals. To illustrate the scanning capability of the telescope, a map of Orion-A obtained using it is presented.
Daniel R. R.
Ghosh Sanjay K.
Iyengar V. K. K.
Patkar D. M.
Rengarajan T. N.
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