radec2v2v3_estimate
- jwst.cube_build.coord.radec2v2v3_estimate(ra_ref, dec_ref, roll_ref, v2_ref, v3_ref, ra, dec)[source]
Convert
ra,dectov2, v3.This routine is used for debugging purposes. It is not actually used in the
cube_buildstep for routine IFU cube building. The conversion from RA,Dec to V2,V3 is handled more accurately by the transforms provided by assign_wcs.- Parameters:
- ra_reffloat
RA of reference point given in degrees
- dec_reffloat
Dec of reference point given in degrees
- roll_reffloat
Roll angle given in degrees
- v2_reffloat
V2 coordinate of reference point given in arcseconds
- v3_reffloat
V3 coordinate of reference point given in arcseconds
- rafloat
RA coordinate given in degrees
- decfloat
Dec coordinate given in degrees
- Returns:
- v2float
V2 coordinate in arcseconds
- v3float
V3 coordinate in arcseconds