User feedback on supersampled PSFs

[mperrin]

Issue by josePhoenix Thursday Apr 20, 2017 at 18:57 GMT Originally opened as https://github.com/mperrin/webbpsf/issues/163

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@AndreaBellini would like us to improve the documentation on obtaining supersampled PSFs. Here's the current section: http://pythonhosted.org/webbpsf/webbpsf.html#pixel-scales-sampling-and-oversampling

I understand that Andrea wanted a PSF sampled at a different pixel scale than the detector pixels, and was frustrated by the fact that options['parity'] = 'odd' determines the parity of the final down-sampled array and not the OVERSAMP extension. The answer ended up being to change the pixelscale attribute and supply an odd number of pixels to fov_pixels=.

Could you suggest how we should improve this section, @AndreaBellini?

[AndreaBellini]

Hi,

can the options['parity’] be linked to the final down sampling instead? Alternatively, can another option do that without having to relying on tricks? Most people measuring stars would prefer a PSF centered on the center of a pixel and not on the corner. Can that be made as the default option?

Cheers,

Andrea

On Aug 28, 2018, at 17:57, Marshall Perrin <[email protected]mailto:[email protected]> wrote:

[https://avatars3.githubusercontent.com/u/172886?v=4]https://github.com/josePhoenix Issue by josePhoenixhttps://github.com/josePhoenix Thursday Apr 20, 2017 at 18:57 GMT Originally opened as mperrin/webbpsf#163https://github.com/mperrin/webbpsf/issues/163

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@AndreaBellinihttps://github.com/AndreaBellini would like us to improve the documentation on obtaining supersampled PSFs. Here's the current section: http://pythonhosted.org/webbpsf/webbpsf.html#pixel-scales-sampling-and-oversampling

I understand that Andrea wanted a PSF sampled at a different pixel scale than the detector pixels, and was frustrated by the fact that options['parity'] = 'odd' determines the parity of the final down-sampled array and not the OVERSAMP extension. The answer ended up being to change the pixelscale attribute and supply an odd number of pixels to fov_pixels=.

Could you suggest how we should improve this section, @AndreaBellinihttps://github.com/AndreaBellini?

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