1 September 1974 The NASA 48" Telescope
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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.
© (1974) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Raymond F. Delgado, Raymond F. Delgado, } "The NASA 48" Telescope", Proc. SPIE 0044, Instrumentation in Astronomy II, (1 September 1974); doi: 10.1117/12.953928; https://doi.org/10.1117/12.953928
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