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The specification of the Target component differs somewhat depending on whether a Natural Guide Star (NGS) or the Laser Guide Star (LGS) is being employed. There also can be differences in the target component, depending on whether NIRI or NIFS is being used, since the NIFS OIWFS can be employed to provide tip/tilt information.
This section explains how to configure ALTAIR in the Observing Tool and how to specify the AO and tip/tilt star in the "Target Component" when ALTAIR is being used.
Altair Optomechanical Overview
Papers describing aspects of ALTAIR include: