Physics – Optics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.2209b&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #22.09; Bulletin of the American Astronomical Society, V
Physics
Optics
Scientific paper
The Quad Orthogonal Transfer Array (QUOTA) camera is the newest instrument to be added to the WIYN 3.5-meter telescope at Kitt Peak National Observatory. QUOTA is designed to exploit the excellent quality of the WIYN site and optics, accommodating the best reachable seeing conditions of 0.4 arc-seconds at appropriate sampling. As the precursor to the WIYN One Degree Imager, QUOTA is a testbed for techniques that the WIYN telescope will eventually employ in ODI to realize its full potential over a one square degree field. A necessary step in achieving such high image quality is the use of fast guiding, a strategy that will improve seeing by providing high frequency tip-tilt corrections to the image.
The QUOTA Guide Core software computes the shift in an image based on data from small guide windows read rapidly from the chip. The Guide Core must support reading this window at cycles of up to 50 Hz, although we will target 20 Hz for initial commissioning. During each cycle the software must use the video feed to compute the necessary shift and formulate a shift command to send to the camera -a demanding task that must be accomplished very quickly. The software must also extract as much information from the guide window images as possible, since the guide data are potentially of scientific value. We have examined techniques for achieving the effective guiding needed to reach the full potential of the QUOTA system.
Brondel Brian J.
Harbeck Daniel-Rolf
Howell Steve B.
Yeatts Andrey
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