chandra_aca.calc_aca_from_targ

chandra_aca.calc_aca_from_targ(targ, y_off, z_off, si_align=None)

Calculate PCAD (ACA) pointing attitude.

Calculate the PCAD (ACA) pointing attitude from target attitude and Y,Z offset (per OR-list).

Parameters:

targ

science target from OR/Obscat (Quat-compliant object)

y_off

Y offset (deg, sign per OR-list convention)

z_off

Z offset (deg, sign per OR-list convention)

si_align

SI ALIGN matrix (default=ODB_SI_ALIGN)

Returns:

q_aca (Quat)