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Proceedings Paper

The NASA 48" Telescope
Author(s): Raymond F. Delgado
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Paper Abstract

A unique telescope was designed and built for the Go Aard Space Flight Center of NASA, by the Electro-Optical Division of Kollmorgen Corp. The telescope to be used as an laser ranger, is a servo driven 48" altazimuth telescope with the accuracy and precision of a theodolite. Among its salient features are the use of a gas bearing for azimuth rotation and the precision of its rotational axes. Axis wob ble and axis orthogonality are within one arc second. o achieve the frequency response consistent with a high accuracy servo loop, breakaway torque, from all sources, was limited to 20 ft. lbs about both axes. Final tests showed torque about the elevation axis to be 7 ft. lbs. About the azimuth axis, with a rotating mass of 30,000 lbs, the measured breakaway torque was 0.75 ft. lbs.

Paper Details

Date Published: 1 September 1974
PDF: 12 pages
Proc. SPIE 0044, Instrumentation in Astronomy II, (1 September 1974);
Show Author Affiliations
Raymond F. Delgado, Electro-Optical Division of Koihriorgen Corp. (United States)

Published in SPIE Proceedings Vol. 0044:
Instrumentation in Astronomy II
Lewis Larmore; Donald H. Menzel; David Crawford, Editor(s)

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