webbpsf_ext.coords.radec_to_v2v3¶
- webbpsf_ext.coords.radec_to_v2v3(coord_objs, siaf_ref_name, coord_ref, pa_ref, frame_out='tel', base_off=(0, 0), dith_off=(0, 0))[source]¶
RA/Dec to V2/V3
Convert a series of RA/Dec positions to telescope V2/V3 coordinates (in arcsec).
- Parameters
coord_objs (tuple) – (RA, Dec) positions (deg), where RA and Dec are numpy arrays.
siaf_ref_name (str) – Reference SIAF aperture name (e.g., ‘NRCALL_FULL’)
coord_ref (list or tuple) – RA and Dec towards which reference SIAF points
pa (float) – Position angle in degrees measured from North to V3 axis in North to East direction.
- Keyword Arguments
frame_out (str) – One of ‘tel’ (arcsec), ‘sci’ (pixels), or ‘det’ (pixels).
base_off (list or tuple) – X/Y offset of overall aperture offset (see APT pointing file)
dither_off (list or tuple) – Additional offset from dithering (see APT pointing file)