WFPC2_DISTORTED

Name

wfpc2_distorted

Purpose (one Line Only)

Compute inverse of the wfpc2\_metric function.

Description

Iterative reverse solution of wfpc2_metric (HST WFPC2 camera distortion
model). This depends entirely on the solutions in the wfpc2_metric
program.

Calling Sequence

wfpc2_distorted,xundist,yundist,xdist,ydist

Inputs

xundist - X coordinate in the undistorted (sky) plane
yundist - Y coordinate in the undistorted (sky) plane

Optional Input Parameters

ITER - Number of iteration to run to get the answer (default=1)
FILTER - String with the name of the filter used (this defines the
distortion coefficients used.

Keyword Input Parameters

Outputs

xdist - X coordinate in the native chips coordinates
ydist - Y coordinate in the native chips coordinates

Keyword Output Parameters

Common Blocks

Side Effects

Restrictions

Procedure

Modification History

Written by Peter Collins, Lowell Observatory, circa 2008
2008/12/15, MWB, promoted internal calculations to double precision
2010/03/08, MWB, placed into library with documentation