FitSipDistortionConfig

class lsst.meas.astrom.FitSipDistortionConfig(*args, **kw)

Bases: Config

Config for FitSipDistortionTask

Attributes Summary

gridBorder	When setting the gird region, how much to extend the image bounding box (in pixels) before transforming it to intermediate world coordinates using the initial WCS.
maxScatterArcsec	Maximum median scatter of a WCS fit beyond which the fit fails (arcsec); be generous, as this is only intended to catch catastrophic failures (float, default 10)
nClipMax	Maximum number of matches to reject when sigma-clipping (int, default 1)
nClipMin	Minimum number of matches to reject when sigma-clipping (int, default 0)
nGridX	Number of X grid points used to invert the SIP reverse transform.
nGridY	Number of Y grid points used to invert the SIP reverse transform.
numRejIter	Number of rejection iterations (int, default 3)
order	Order of SIP polynomial (int, default 4)
refUncertainty	RMS uncertainty in reference catalog positions, in pixels.
rejSigma	Number of standard deviations for clipping level (float, default 3.0)

Attributes Documentation

gridBorder

When setting the gird region, how much to extend the image bounding box (in pixels) before transforming it to intermediate world coordinates using the initial WCS. (float, default 50.0)

maxScatterArcsec

Maximum median scatter of a WCS fit beyond which the fit fails (arcsec); be generous, as this is only intended to catch catastrophic failures (float, default 10)

Valid Range = [0,inf)

nClipMax

Maximum number of matches to reject when sigma-clipping (int, default 1)

nClipMin

Minimum number of matches to reject when sigma-clipping (int, default 0)

nGridX

Number of X grid points used to invert the SIP reverse transform. (int, default 100)

nGridY

Number of Y grid points used to invert the SIP reverse transform. (int, default 100)

numRejIter

Number of rejection iterations (int, default 3)

Valid Range = [0,inf)

order

Order of SIP polynomial (int, default 4)

Valid Range = [0,inf)

refUncertainty

RMS uncertainty in reference catalog positions, in pixels. Will be added in quadrature with measured uncertainties in the fit. (float, default 0.25)

rejSigma

Number of standard deviations for clipping level (float, default 3.0)

Valid Range = [0.0,inf)