Overview of the performance of the W.M. Keck Observatory

The performance goals of the telescope are reviewed and compared with the achieved values. The optical performance is close to the original goals, but our initial observations support evidence from other observatories that Mauna Kea seeing is even better than was assumed in setting the goals; so it is important not to lower our aims. The primary mirror active control system performance is summarized as well as the pointing the tracking performance. The telescope is substantially operational and since January 1994 we have been devoting the majority of nights to astronomical science.

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