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.ndarrayorastropy.unit.Quantity Signal-to-noise ratio of photometric observations (dimensionless).
- dist
np.ndarrayorastropy.unit.Quantity Scatter in measured positions (default: millarcsec)
- snr
- Returns
- params
dict Fitted model parameters. Fields are:
C: Model scale factor (dimensionless).theta: Seeing (default: milliarcsec).sigmaSys: Systematic astrometric uncertainty (default: milliarcsec).
- params