Enum RotType¶
Enum Documentation¶
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enum
lsst::afw::image
::
RotType
Type of rotation.
Values:
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UNKNOWN
Rotation angle is unknown. Note: if there is no instrument rotator then it is better to compute SKY or HORIZON and use that rotation type rather than specify UNKNOWN.
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SKY
Position angle of focal plane +Y, measured from N through E. At 0 degrees, +Y is along N and +X is along E/W depending on handedness. At 90 degrees, +Y is along E and +X is along S/N depending on handedness.
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HORIZON
Position angle of focal plane +Y, measured from +Alt through +Az. At 0 degrees, +Y is along +Alt and +X is along +/-Az, depending on handedness. At 90 degrees, +Y is along +Az and +X is along -/+Alt, depending on handedness.
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MOUNT
The position sent to the instrument rotator; the details depend on the rotator.
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