You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither SPIE nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the SPIE website.
28 July 2010Maintenance and operation of the adaptive optics module for NICI, the high-contrast coronagraphic imager of GEMINI observatory
NICI, the high-contrast coronagraphic imager of Gemini observatory, primarily dedicated to planet hunting has
been offered to the astronomical community since end of 2008. We present our experiences in operating and
maintaining NICI's 85 element curvature adaptive optics (AO) system. A detailed study of NICI AO telemetry
data is also most relevant to prepare the arrival of next generation instruments. We summarize the behavior
of interaction matrices, control matrices and error transfer functions under different operational conditions; a
detailed understanding of the system helps monitoring and optimizing performance. Furthermore, we describe
tuning (membrane mirror stroke/extra focal distance) for non-optimal seeing conditions as well as for niche
applications of NICI such as observing small moons and asteroids. We compare on-sky measurements to theory
or simulations.
The alert did not successfully save. Please try again later.
Markus Hartung, Tom L. Hayward, M. Chun, A. Kellerer, "Maintenance and operation of the adaptive optics module for NICI, the high-contrast coronagraphic imager of GEMINI observatory," Proc. SPIE 7736, Adaptive Optics Systems II, 77362K (28 July 2010); https://doi.org/10.1117/12.858054