Specifies an alternative matching algorithm. The default
algorithm is `match', which is an implementation of the
FOCAS matching algorithm [valdes95] by
Michael W Richmond [match-home]. A
version of this is distributed with autoastrom, but it
should be compatible with any later version.
Alternatively, you can use the `findoff' application,
which is part of CCDPACK. This does
work, but is rather slow, and is completely thrown by a CCD
image with unequal X and Y scales, making it essentially
unusable if the image NDF does not have some astrometry
already, or if you try to specify a position with
--obsdata (see Section 2.4.12).
Since it has different characteristics, though, it may
work in some circumstances where `match' does not. Again,
the author of autoastrom would welcome feedback on this
point.
autoastrom supports `match' through the more general
plugin mechanism described in Section 4.2.
Type: string; default: `match'.