chandra_aca.transform.yagzag_to_radec

chandra_aca.transform.yagzag_to_radec(yag, zag, q_att)

Calculate RA, Dec from ACA Y-angle, Z-angle and pointing quaternion.

The input yag and zag values can be 1-d arrays in which case the output ra and dec will be corresponding arrays of the same length.

Parameters:

yag

ACA Y angle (arcsec)

zag

ACA Z angle (arcsec)

q_att

ACA pointing quaternion (Quat or Quat-compatible input)

Returns:

ra, dec (degrees)