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sot / chandra_aca

Chandra Aspect Camera Tools
https://sot.github.io/chandra_aca
BSD 2-Clause "Simplified" License
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Add pix_zero_loc param for convention on pixel labeling #26

Closed taldcroft closed 7 years ago

taldcroft commented 7 years ago

This is useful for the simulator, and in general for any work where raw pixel values and centroids are being interposed. The ACA PEA uses the edge convention which turns out to be mostly inconvenient. I recall worrying about this for the pipeline, and I have a vague recollection that the aspect pipeline poly coeffs are off by 2.5 arcsec because row/col there use center. (That might be completely wrong, but that's my recollection).

In any case we need to just be clear.

taldcroft commented 7 years ago

@jeanconn - I fixed the comments per your suggestion.