sigma_fov¶
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mrspoc.
sigma_fov
(Gmag)[source] [edit on github]¶ Approximate Gaia astrometric uncertainty in a single measurement, i.e. “the along-scan accuracy per field of view crossing”, after Perryman et al. 2014, Eqn. 1 - 3.
Parameters: Gmag : float or
ndarray
Gaia G band magnitude.
Returns: sigma :
Quantity
Approximate astrometric uncertainty for a target of magnitude
Gmag
, in units of arcseconds.