Up to one hour of an observing night may be used for engineering tests to assess and improve observatory performance. If an intermittent fault occurs during observing, it can sometimes be in the best interest of our user community as a whole to chase down the problem, rather than work around it. We make every reasonable effort to schedule engineering tests at times that minimize the impact on observing. However, with some tests we need a fair sampling at all times of the night, and it will not always be possible to confine the tests to twilight.

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This page last updated 14-Apr-2015, gm
Telescope-scheduling@keck.hawaii.edu