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One consequence of this overhaul is that measurements using the SdssCentroid algorithm, which is currently the default, require that a PSF be attached to the Exposure being measured. This could be as simple as attaching a SingleGaussianPsf:
| Code Block | ||
|---|---|---|
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# Add a Gaussian PSF to the exposure. This is needed by the SDSS Centroid Algorithm.
# For the kernel make it 3*sigma on either side of the central pixel.
sigma = 1.0
size = 2*int(3*sigma) + 1
gaussianPSF = measAlg.SingleGaussianPsf(size, size, sigma)
exposure.setPsf(gaussianPSF) |
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