cheta.derived.pcad.DP_ROLL#

class cheta.derived.pcad.DP_ROLL#

Bases: DerivedParameterPcad

Off-Nominal Roll Angle 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.

Calculated using the four-quadrant arctan of the sun vector y and z components in the ACA frame where the sun vector is from predictive ephemeris [SOLAREPHEM0 and ORBITEPHEM0] and the estimated attitude from the OBC’s estimated quaternion [AOATTQT<n>].

http://occweb.cfa.harvard.edu/twiki/pub/Aspect/WebHome/ROLLDEV3.pdf

rootparams = ['orbitephem0_x', 'orbitephem0_y', 'orbitephem0_z', 'solarephem0_x', 'solarephem0_y',...#

time_step = 1.025#

max_gap = 4.0#

max_gaps#

dtype#

calc(data)#