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SET 2NDROTATION

    SET 2ndRotation rotation

    Real :: rotation               ! rotation angle [deg]

    Set rotation angle for the secondary mirror and Wobbler mechanism [deg].

    The angle is limited to be between -50 and +50 [deg].

    NOTE: Its sense is opposite to the mathematical convention!
    (this will be changed in a future release of the NCS.)

    The rotation angle is relative to the horizontal system.  A value of 0.0
    corresponds to the Wobbler switching purely in Azimuth, i.e., "normal"
    Wobbler switching.

    Observers must inform the operator if they want to use this feature.

    A non-zero values is up to know only meaningful and supported for
    bolometer observations with Wobbler switching and the observing modes:
    POINTING, FOCUS, and OTFMAP.  The OTF map must be set to be in the
    (true-angle) horizontal system and the direction of the OTF subscans
    must agree with that of the 2ndRotation.  (There is a special pako
    script available in the bolometer pool to do this).

    To avoid un-intentional errors, this feature can only be used by "privileged
    users": ask the AOD or the NCS team.


Gildas manager 2023-06-01