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1 July 1990 Performance of the Apache Point Observatory 3.5-m telescope: II, pointing and tracking
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Abstract
The Apache Point Observatory 3.5-m telescope, loated in the Sacramento Mountains of New Mexico at an elevation of 2.8 km, is awaiting the installation of the primary mirror. The design of this telescope includes a number of innovative features including a lightweight honeycomb borosilicate mirror, friction drives and encoding, and complete computer control to facilitate remote use. A 0.3-m telescope was attached to the telescope mount to monitor tracking and pointing performance. Currently, the telescope tracks open-loop to 0.3 arcsec rms over 10 min and points to 5 arcsec rms. Improvements to the servosystem and encoder mounting should make it possible to meet the goals of tracking to 0.2 arcsec rms and pointing to 1 arcsec rms.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Russell E. Owen, Charles L. Hull, and Walter A. Siegmund "Performance of the Apache Point Observatory 3.5-m telescope: II, pointing and tracking", Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, (1 July 1990); https://doi.org/10.1117/12.19254
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