rotate_ra_dec

rubin_sim.scheduler.utils.rotate_ra_dec(ra, dec, ra_target, dec_target, init_rotate=0.0)

Rotate ra and dec coordinates to be centered on a new dec.

Rotates around the x-axis 1st, then to the dec, then ra.

Parameters:

rafloat or np.array

RA coordinate(s) to be rotated in radians

decfloat or np.array

Dec coordinate(s) to be rotated in radians

ra_rotationfloat

RA distance to rotate in radians

dec_targetfloat

Dec distance to rotate in radians

init_rotatefloat (0.)

The amount to rotate the points around the x-axis first (radians).