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Shift distorted PSFs back to correct detector position #229

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merged 5 commits into from
Oct 23, 2018
Merged

Shift distorted PSFs back to correct detector position #229

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02cd903
Shift distorted PSFs back to correct detector position
shanosborne Aug 30, 2018
aa189bd
Update fix for distorted PSFs off from detector position
shanosborne Sep 13, 2018
64f0c9f
Merge branch 'master' into distortion
shanosborne Sep 14, 2018
8a6cd5b
Merge branch 'master' into distortion
shanosborne Sep 25, 2018
0c79dd3
PEP8 update
shanosborne Oct 22, 2018
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10 changes: 6 additions & 4 deletions webbpsf/distortion.py
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Original file line number Diff line number Diff line change
@@ -1,14 +1,12 @@
import copy

import astropy.convolution
import astropy.io.fits as fits
import copy
import numpy as np
import poppy
import pysiaf
from scipy.interpolate import griddata
from scipy.ndimage.interpolation import rotate

import poppy


def _get_default_siaf(instrument, aper_name):
""" Store the default SIAF values for distortion and rotation """
Expand Down Expand Up @@ -98,6 +96,10 @@ def apply_distortion(hdulist_or_filename=None, fill_value=0):
# Going from Idl to Sci this way allows us to add in the distortion
xsci, ysci = aper.idl_to_sci(xidl, yidl)

# 6) Shift the sci indices so they match the PSF's position again (moved slightly off from pysiaf calculation)
xsci += xpix_center - np.median(xsci)
ysci += ypix_center - np.median(ysci)

# ###############################################
# Create an array of indices (in pixels) that the final data will be interpolated on to
# 1) Set up blank indices (in pixels)
Expand Down