cheta.derived.pcad.DP_ROLL_FSS

class cheta.derived.pcad.DP_ROLL_FSS

Bases: DerivedParameterPcad

Off-Nominal Roll Angle from FSS Data in ACA Frame [Deg]

Defined as the rotation about the ACA X-axis required to align the sun vector with the ACA X/Z plane.

When in FSS FOV per AOSUNPRS: Calculated using the FSS alpha and beta angles to compute the sun vector in the FSS frame. The sun vector is then rotated into the ACA frame using the rotation matrix (an OBC k-constant). Roll is computed using the arctan function.

When NOT in FSS FOV per AOSUNPRS: <data>.bads = 1

rootparams = ['aoalpang', 'aobetang', 'aosunprs']

time_step = 1.025

max_gap = 10.0

dtype

calc(data)