polarisation_frame_from_wcs

polarisation_frame_from_wcs(wcs, shape) → PolarisationFrame[source]

Convert wcs to polarisation_frame

See FITS definition in Table 29 of https://fits.gsfc.nasa.gov/standard40/fits_standard40draft1.pdf or subsequent revision

1 I Standard Stokes unpolarized 2 Q Standard Stokes linear 3 U Standard Stokes linear 4 V Standard Stokes circular −1 RR Right-right circular −2 LL Left-left circular −3 RL Right-left cross-circular −4 LR Left-right cross-circular −5 XX X parallel linear −6 YY Y parallel linear −7 XY XY cross linear −8 YX YX cross linear

stokesI [1] stokesIQUV [1,2,3,4] circular [-1,-2,-3,-4] linear [-5,-6,-7,-8]

For example::

pol_frame =: polarisation_frame_from_wcs(im.image_acc.wcs, im[“pixels”].data.shape)

Parameters:

wcs – World Coordinate System
shape – Shape corresponding to wcs

Returns:

Polarisation_Frame object