QSteeringYAligned:

% Compute the steering rotation keeping the body axis aligned with Y.
 Compute the cone rotation axis for a clock rotation about X.
 The sign convention indicates if clock is measured around the direction
  the sun (+1) or the AWAY from the sun (-1)

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   Form:
   qSteer = QSteeringYAligned( cone, clock, c )
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   Inputs
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   cone              (1,1)  Cone angle
   clock             (1,1)  Clock angle
   c                 (1,1)  Sign convention for clock angle, measured
                            about direction TO the sun (+1) or AWAY from
                            the sun (-1). Default is +1.

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   Outputs
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   qSteer            (4,1)     Reference frame to body frame quaternion

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