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**Issue by [josePhoenix](https://github.com/josePhoenix)**
_Monday Aug 31, 2015 at 18:29 GMT_
_Originally opened as https://github.com/mperrin/poppy/issues/112_
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Anand says tip and tilt are swa…
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Remove dependence on obs_lsstSim for geometry and pupil to focal plane mapping.
Original issue below:
Currently sims_GalSimInterface still relies on obs_lsstSim for (only?) focal plane geometry in…
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During the DESC hack week, I implemented photon shooting for optical PSFs by computing finite difference gradients of optical phase screens.
It would probably be faster and more accurate to use a…
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I have a pipeline that runs fine from the Windows gui, but then fails in the CellProfiler/examples repository when travis runs. Here is the error I receive:
```
Error detected during run of module…
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There is a discrepancy between GalSim optical PSF based on 3rd order aberration and ZEMAX output. By comparing them by eyes and also from suggestions by DES optics people, adding trefoil to optical PS…
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The current circular zernike cartesian polynomials in **zernikecartesian**(coefficient,x,y) for Z29 and Z30 are inconsistent with their polar form. I think the cartesian forms should be:
Z29 = Z[29] …
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Running an analysis pipeline on AWS on the stable 2.2.0 I got the following error:
```
Wed Aug 10 18:48:16 2016: Image # 19, module MeasureObjectNeighbors # 34: 3.55 sec
Error detected during run of …
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The Thibos-based optics, generated by
`oi = oiCreate('wvf human');`
produces a complex-valued OTF, as evidenced by the fact that
`isreal(oi.optics.OTF.OTF)`
returns 0.
This is unlike
`oi = oiCreate(…
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From Arthur Vigan at LAM:
> Dear Marshall,
>
> I have started using your poppy library, mainly for the implementation of the Zernike polynomials that you have included in the library. In particular…
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Anand says tip and tilt are swapped, and maybe entries on lower rows of the Zernike pyramid as well. Note to self to check this and see if I can reproduce.