ASTINFO

Name

astinfo

Purpose (one Line Only)

Decode (or add) astrometric information from a FITS header

Description

Calling Sequence

astinfo,hdr,info,error

Inputs

hdr - FITS header to be read (or modified)
info - Astrometric calibration information used by routines like
astxy2rd.pro.

Optional Input Parameters

TOHEADER - Flag, if set, the information structure must exist and its
information is appended to the input FITS header.
If not set, the header is parsed for the astrometric information
from which the info structure is built. If the header does
not have the astrometric information a scalar 0 will be
returned.

Keyword Input Parameters

SILENT - Flag, if set will suppress output

Outputs

info - Normally an output, but is an input if TOHEADER is set.
error - 1 if there is an error, 0 if everything is ok.
When reading a header this usually means there was no astrometry
information in the header. When modifying a header it means
there was something wrong and nothing was done.

Keyword Output Parameters

Common Blocks

Side Effects

Restrictions

Procedure

Modification History

Written by Marc W. Buie, Southwest Research Institute, 2009/11/18
2009/12/02, MWB, dropped support for different order of fit for xi and eta.
Now they are required to be the same. Also dropped
support for old style of term selection.
2010/03/21, MWB, added error output variable and make a fix that properly
handles writing a new solution to a header that already
has a solution with more terms than the new one.
2016/06/02, MWB, added SILENT keyword