fitAstromErrModel¶
-
lsst.validate.drp.astromerrmodel.
fitAstromErrModel
(snr, dist)¶ Fit model of astrometric error from the LSST Overview paper:
http://arxiv.org/abs/0805.2366v4
Parameters: - snr :
np.ndarray
orastropy.unit.Quantity
Signal-to-noise ratio of photometric observations (dimensionless).
- dist :
np.ndarray
orastropy.unit.Quantity
Scatter in measured positions (default: millarcsec)
Returns: - params :
dict
Fitted model parameters. Fields are:
C
: Model scale factor (dimensionless).theta
: Seeing (default: milliarcsec).sigmaSys
: Systematic astrometric uncertainty (default: milliarcsec).
- snr :