CHIPROT

Name

chiprot

Purpose (one Line Only)

Find the best rotation and offset for one chip against monolith coordinates

Description

Calling Sequence

chiprot,astinfo,ref,xoffset,yoffset,rotang

Inputs

astinfo - Anonymous structure that contains an astrometric description
of a image-based coordinate system and its mapping to the
celestial sphere. (see mkastinfo for more information)
ref - Anonymous structure that contains a set of measurements of
sources on an image with a corresponding linkage to
celestial coordinates (ra,dec). This structure is normally
created by using rdref.pro.
xoffset - Initial guess of the X offset between the coordinates in ref
and the coordinates described in astinfo.
xoffset - Initial guess of the Y offset between the coordinates in ref
and the coordinates described in astinfo.
rotang - Initial guess of the rotation between the coordinates in ref
and the coordinates described in astinfo.

Optional Input Parameters

Keyword Input Parameters

Outputs

xoffset - Best fitting X offset
yoffset - Best fitting Y offset
rotang - Best fitting rotation angle (radians)

Keyword Output Parameters

CONVERGED - Flag, if set the results are fully converged.

Common Blocks

Side Effects

Restrictions

Procedure

Modification History

Written by Marc W. Buie, Southwest Research Institute, 2010/01/13
2012/05/02, MWB, converted old astrd2xy call to astcvt
2012/05/30, MWB, added CONVERGED output keyword