Make parameterized PSFs vary over the focal plane

[cwwalter]

Currently (with a parameterized PSF) the PSF does not vary over the focal plane.

With the addition of #37 (passing the focal plane position to GalSim) this could be modified and a parameterized function could be used in GalSim.

On the other hand with a ray-traced atmosphere and an extra phase screen representing the perturbed optics (#9) I believe this would be naturally emergent. So hopefully we get this in DC2 by implementing the other two options.

[jchiang87]

With the addition of #37 (passing the focal plane position to GalSim) this could be modified and a parameterized function could be used in GalSim.

Even with an emergent implementation, it would be nice to have this option in case we want to test or develop interpolation schemes using these simulations.

[cwwalter]

I think between #9 and #101 we now have a PSF which varies over the focal plane.

But we still might want to have this as a an option with parameterized PSFs (coupled with #37) so we could study PSF interpolation schemes as mentioned by Jim above. So, am leaving this issue live but removing the DC2 label since I think we have implemented the feature there.

[cwwalter]

Hi All,

This is a very old issue and the way we do PSF and the work the PSF group is doing is quite a bit different now.

Is this sort of thing something that the PSF group would still be interested in?

[rmjarvis]

There are lots of ways in the config structure to have parameterized PSfs vary over the focal plane. I don't think we need something specific to imSim about this.

[cwwalter]

OK closing.