lsst.meas.astrom
21.0.0-4-g591bb35+3b02b42186
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Public Member Functions | |
def | __init__ (self, refObjLoader, schema=None, **kwargs) |
def | run (self, sourceCat, exposure) |
def | solve (self, exposure, sourceCat) |
def | setRefObjLoader (self, refObjLoader) |
def | loadAndMatch (self, exposure, sourceCat) |
Public Attributes | |
usedKey | |
refObjLoader | |
Static Public Attributes | |
ConfigClass = AstrometryConfig | |
Match an input source catalog with objects from a reference catalog and solve for the WCS. This task is broken into two main subasks: matching and WCS fitting which are very interactive. The matching here can be considered in part a first pass WCS fitter due to the fitter's sensitivity to outliers. Parameters ---------- refObjLoader : `lsst.meas.algorithms.ReferenceLoader` A reference object loader object schema : `lsst.afw.table.Schema` Used to set "calib_astrometry_used" flag in output source catalog. **kwargs additional keyword arguments for pipe_base `lsst.pipe.base.Task.__init__`
Definition at line 73 of file astrometry.py.
def lsst.meas.astrom.astrometry.AstrometryTask.__init__ | ( | self, | |
refObjLoader, | |||
schema = None , |
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** | kwargs | ||
) |
Definition at line 94 of file astrometry.py.
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inherited |
Load reference objects overlapping an exposure and match to sources detected on that exposure. Parameters ---------- exposure : `lsst.afw.image.Exposure` exposure that the sources overlap sourceCat : `lsst.afw.table.SourceCatalog.` catalog of sources detected on the exposure Returns ------- result : `lsst.pipe.base.Struct` Result struct with Components: - ``refCat`` : reference object catalog of objects that overlap the exposure (`lsst.afw.table.SimpleCatalog`) - ``matches`` : Matched sources and references (`list` of `lsst.afw.table.ReferenceMatch`) - ``matchMeta`` : metadata needed to unpersist matches (`lsst.daf.base.PropertyList`) Notes ----- ignores config.matchDistanceSigma
Definition at line 116 of file ref_match.py.
def lsst.meas.astrom.astrometry.AstrometryTask.run | ( | self, | |
sourceCat, | |||
exposure | |||
) |
Load reference objects, match sources and optionally fit a WCS. This is a thin layer around solve or loadAndMatch, depending on config.forceKnownWcs. Parameters ---------- exposure : `lsst.afw.image.Exposure` exposure whose WCS is to be fit The following are read only: - bbox - photoCalib (may be absent) - filter (may be unset) - detector (if wcs is pure tangent; may be absent) The following are updated: - wcs (the initial value is used as an initial guess, and is required) sourceCat : `lsst.afw.table.SourceCatalog` catalog of sources detected on the exposure Returns ------- result : `lsst.pipe.base.Struct` with these fields: - ``refCat`` : reference object catalog of objects that overlap the exposure (with some margin) (`lsst.afw.table.SimpleCatalog`). - ``matches`` : astrometric matches (`list` of `lsst.afw.table.ReferenceMatch`). - ``scatterOnSky`` : median on-sky separation between reference objects and sources in "matches" (`lsst.afw.geom.Angle`) or `None` if config.forceKnownWcs True - ``matchMeta`` : metadata needed to unpersist matches (`lsst.daf.base.PropertyList`)
Definition at line 106 of file astrometry.py.
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inherited |
Sets the reference object loader for the task Parameters ---------- refObjLoader An instance of a reference object loader task or class
Definition at line 105 of file ref_match.py.
def lsst.meas.astrom.astrometry.AstrometryTask.solve | ( | self, | |
exposure, | |||
sourceCat | |||
) |
Load reference objects overlapping an exposure, match to sources and fit a WCS Returns ------- result : `lsst.pipe.base.Struct` Result struct with components: - ``refCat`` : reference object catalog of objects that overlap the exposure (with some margin) (`lsst::afw::table::SimpleCatalog`). - ``matches`` : astrometric matches (`list` of `lsst.afw.table.ReferenceMatch`). - ``scatterOnSky`` : median on-sky separation between reference objects and sources in "matches" (`lsst.geom.Angle`) - ``matchMeta`` : metadata needed to unpersist matches (`lsst.daf.base.PropertyList`) Notes ----- ignores config.forceKnownWcs
Definition at line 156 of file astrometry.py.
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static |
Definition at line 91 of file astrometry.py.
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inherited |
Definition at line 92 of file ref_match.py.
lsst.meas.astrom.astrometry.AstrometryTask.usedKey |
Definition at line 98 of file astrometry.py.