# How to extract PSFEx PSF from a PVI/calexp outside of Science Pipelines?

**URL:** <https://www.rubin.community/t/how-to-extract-psfex-psf-from-a-pvi-calexp-outside-of-science-pipelines/8057>\
**Category:** Data Products\
**Tags:** psf\
**Created:** [November 7, 2023, 8:46pm UTC](https://www.rubin.community/t/how-to-extract-psfex-psf-from-a-pvi-calexp-outside-of-science-pipelines/8057 "2023-11-07T20:46:58Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![gpdf](https://sea2.discourse-cdn.com/flex002/user_avatar/www.rubin.community/gpdf/32/65_2.png) [@gpdf](https://www.rubin.community/u/gpdf)\
**Post date:** [November 10, 2023, 6:05pm UTC](https://www.rubin.community/t/how-to-extract-psfex-psf-from-a-pvi-calexp-outside-of-science-pipelines/8057/4 "2023-11-10T18:05:23Z")

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So, I think that what you trying to do is find a means to use the actual external `psfex` package to work with image files downloaded from the RSP environment, is that correct?

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_[View the full topic](https://www.rubin.community/t/how-to-extract-psfex-psf-from-a-pvi-calexp-outside-of-science-pipelines/8057)._