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Pan "hack" causing compass failure for HST/ACS FLC image

See original GitHub issue

I am not sure why it is forcing an error here for a big (1 degree) offset.

https://github.com/ejeschke/ginga/blob/833517ab092a525b2eac63b736515a21951dacd2/ginga/rv/plugins/Pan.py#L310-L311

This causes the following failure for HST/ACS FLC image, jbt7a3k7q_flc.fits. The detector has 202x202 arcsec^2 FOV and the image WCS is not corrected for distortion at this stage.

WCSError: 'WCS.all_world2pix' failed to converge to the requested accuracy.
After 2 iterations, the solution is diverging at least for one input point.

Issue Analytics

State:
Created 2 years ago
Comments:12 (7 by maintainers)

Top GitHub Comments

1reaction

pllimcommented, Jun 4, 2021

AFAIK, there is no plan to remove any WCS stuff from astropy. However, APE 14 implementation is necessary for GWCS support.

0reactions

ejeschkecommented, Jun 4, 2021

Is the old way going to be deprecated (in astropy itself, I mean)? Is there a timeline for when we have to merge astropy_ape14 and astropy?

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