LSST Applications g013ef56533+63812263fb,g083dd6704c+a047e97985,g199a45376c+0ba108daf9,g1fd858c14a+fde7a7a78c,g210f2d0738+db0c280453,g262e1987ae+abed931625,g29ae962dfc+058d1915d8,g2cef7863aa+aef1011c0b,g35bb328faa+8c5ae1fdc5,g3fd5ace14f+64337f1634,g47891489e3+f459a6810c,g53246c7159+8c5ae1fdc5,g54cd7ddccb+890c8e1e5d,g5a60e81ecd+d9e514a434,g64539dfbff+db0c280453,g67b6fd64d1+f459a6810c,g6ebf1fc0d4+8c5ae1fdc5,g7382096ae9+36d16ea71a,g74acd417e5+c70e70fbf6,g786e29fd12+668abc6043,g87389fa792+8856018cbb,g89139ef638+f459a6810c,g8d7436a09f+1b779678e3,g8ea07a8fe4+81eaaadc04,g90f42f885a+34c0557caf,g97be763408+9583a964dd,g98a1a72a9c+028271c396,g98df359435+530b675b85,gb8cb2b794d+4e54f68785,gbf99507273+8c5ae1fdc5,gc2a301910b+db0c280453,gca7fc764a6+f459a6810c,gd7ef33dd92+f459a6810c,gdab6d2f7ff+c70e70fbf6,ge410e46f29+f459a6810c,ge41e95a9f2+db0c280453,geaed405ab2+e3b4b2a692,gf9a733ac38+8c5ae1fdc5,w.2025.43
LSST Data Management Base Package
Loading...
Searching...
No Matches
lsst.meas.astrom.setMatchDistance Namespace Reference

Functions

 setMatchDistance (matches)
 

Function Documentation

◆ setMatchDistance()

lsst.meas.astrom.setMatchDistance.setMatchDistance ( matches)
Set the distance field of the matches in a match list to the distance in
radians on the sky.

Parameters
----------
matches : `list` of `lsst.afw.table.ReferenceMatch`
    a list of matches, reads the coord field of the source and reference
    object of each match writes the distance field of each match

Notes
-----
.. warning::
   the coord field of the source in each match must be correct

Definition at line 28 of file setMatchDistance.py.

28def setMatchDistance(matches):
29 """Set the distance field of the matches in a match list to the distance in
30 radians on the sky.
31
32 Parameters
33 ----------
34 matches : `list` of `lsst.afw.table.ReferenceMatch`
35 a list of matches, reads the coord field of the source and reference
36 object of each match writes the distance field of each match
37
38 Notes
39 -----
40 .. warning::
41 the coord field of the source in each match must be correct
42 """
43 if len(matches) < 1:
44 return
45
46 sourceCoordKey = afwTable.CoordKey(matches[0].first.schema["coord"])
47 refObjCoordKey = afwTable.CoordKey(matches[0].second.schema["coord"])
48 for match in matches:
49 sourceCoord = match.first.get(sourceCoordKey)
50 refObjCoord = match.second.get(refObjCoordKey)
51 match.distance = refObjCoord.separation(sourceCoord).asRadians()
A FunctorKey used to get or set celestial coordinates from a pair of lsst::geom::Angle keys.
Definition aggregates.h:292