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Field Orientation

The NIRI field orientation is determined by which telescope port (bottom or side) NIRI is installed on, and if on the bottom port, whether or not Altair is used. For most cases, at a PA = 0, North is up and East is to the left, however, when installed on the bottom port and used without Altair, East is to the right:

Port Altair Non-AO
Bottom (1)
Side (3 or 5)

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