Edgewise connectivity: an approach to improving segmented primary mirror performance
نویسندگان
چکیده
منابع مشابه
An analytical approach to improving physician performance.
Health care reform has strengthened the link between performance and reimbursement, exemplified by valuebased purchasing and accountable care organizations. This has led to a heightened responsibility for physician leaders to improve physician performance. However, providing actionable assessments of physician outcomes is not as straightforward as it may seem. The physician leader is faced with...
متن کاملImproving Virtual Team Performance: An Empirical Approach
Increased performance is the key reason for developing software with virtual teams but the research efforts to date are limited. Difficulties for a formal, generic approach are multiplied by the significant differences between how small and large software organizations react to changing operational conditions and act to increase performance. The aim of the paper is to provide the guidelines on ...
متن کاملIn-plane effects on segmented-mirror control.
Extremely large optical telescopes are being designed with primary mirrors composed of hundreds of segments. The "out-of-plane" piston, tip, and tilt degrees of freedom of each segment are actively controlled using feedback from relative height measurements between neighboring segments. The "in-plane" segment translations and clocking (rotation) are not actively controlled; however, in-plane mo...
متن کاملWind-induced deformations in a segmented mirror.
A Zernike expansion of wind-induced deformations in a segmented mirror is described. The wind model is a frozen turbulent field with a Kolmogorov spectrum for scales smaller than the outer scale and a flat spectrum for scales larger than the outer scale. The approach allows a mode-by-mode comparison of the wave-front error contributions from atmospheric phase distortions, wind-induced deformati...
متن کاملLyot Coronagraphy on Giant Segmented-mirror Telescopes
We present a study of Lyot style (i.e., classical, band-limited, and Gaussian occulter) coronagraphy on extremely large, highly-segmented telescopes. We show that while increased telescope diameter is always an advantage for high dynamic range science (assuming wavefront errors have been corrected sufficiently well), segmentation itself sets a limit on the performance of Lyot coronagraphs. Diff...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Astronomical Telescopes, Instruments, and Systems
سال: 2014
ISSN: 2329-4124
DOI: 10.1117/1.jatis.1.1.014002