The stellar and solar tracking system of the Geneva Observatory gondola

Details The stellar and solar tracking system of the Geneva Observatory gondola The stellar and solar tracking system of the Geneva Observatory gondola

Nov 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974tsbb.nasa..167h&link_type=abstract

In NASA. Ames Res. Center Telescope Systems for Balloon-Borne Res. p 167-175 (SEE N75-12735 03-74)

Computer Science

Gondolas, High Altitude Balloons, Star Trackers, Telescopes, Television Equipment, Data Acquisition, Onboard Equipment, Stabilized Platforms, Systems Engineering

Scientific paper

Sun and star trackers have been added to the latest version of the Geneva Observatory gondola. They perform an image motion compensation with an accuracy of plus or minus 1 minute of arc. The structure is held in the vertical position by gravity; the azimuth is controlled by a torque motor in the suspension bearing using solar or geomagnetic references. The image motion compensation is performed by a flat mirror, located in front of the telescope, controlled by pitch and yaw servo-loops. Offset pointing is possible within the solar disc and in a 3 degree by 3 degree stellar field. A T.V. camera facilitates the star identification and acquisition.

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