Three-meter balloon-borne telescope

Details Three-meter balloon-borne telescope Three-meter balloon-borne telescope

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aldr.work..138h&link_type=abstract

In Jet Propulsion Lab., California Inst. of Tech., Report of the Asilomar 3 LDR Workshop p 138-139 (SEE N90-13449 05-18)

Astronomy and Astrophysics

Astronomy

Balloon-Borne Instruments, High Altitude Balloons, Infrared Astronomy, Spectrometers, Telescopes, Cameras, Far Infrared Radiation

Scientific paper

The Three-Meter Balloon-Borne Telescope is planned as a general purpose facility for making far-infrared and submillimeter astronomical observations from the stratosphere. It will operate throughout the spectral range 30 microns to 1 millimeter which is largely obscurred from the ground. The design is an f/13.5 Cassegrain telescope with an f/1.33 3-meter primary mirror supported with a 3-axis gimbal and stabilization system. The overall structure is 8.0 m high by 5.5 m in width by 4.0 m in depth and weighs 2000 kg. This low weight is achieved through the use of an ultra lightweight primary mirror of composite construction. Pointing and stabilization are achieved with television monitoring of the star field, flex-pivot bearing supports, gyroscopes, and magnetically levitated reaction wheels. Two instruments will be carried on each flight; generally a photometric camera and a spectrometer. A 64-element bolometer array photometric camera operating from 30 to 300 microns is planned as part of the facility. Additional instruments will be derived from KAO and other development programs.

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