make_wcs

romanisim.wcs.make_wcs(targ_pos, distortion, roll_ref=0, v2_ref=0, v3_ref=0, wrap_v2_at=180, wrap_lon_at=360)

Create a gWCS from a target position, a roll, and a distortion map.

Parameters:

targ_posastropy.coordinates.SkyCoord

The celestial coordinates of the boresight or science aperture.

distortioncallable

The distortion mapping pixel coordinates to V2/V3 coordinates for a detector.

roll_reffloat

The angle of the V3 axis relative to north, increasing from north to east, at the boresight or science aperture. Note that the V3 axis is rotated by +60 degree to the +Y axis.

v2_reffloat

The v2 coordinate (arcsec) corresponding to targ_pos

v3_reffloat

The v3 coordinate (arcsec) corresponding to targ_pos

Returns:

gwcs.wcs object representing WCS for observation