Instrument Science Report 2001-10:

An Improved Geometric Solution for WFPC2

Casertano and Wiggs

October 29, 2001

Abstract:

We present an improved solution for the geometric distortion in WFPC2, based on multiple observations of a rich stellar field. We also quantify the long-term variation of the relative position of the detectors by tracking the position of the K spots over time. We suggest possible avenues to develop an improved wavelength- and time-dependent geometric solution for WFPC2.

The coefficients of the new solution can be found here.

The Complete Paper is available as PDF (0.30 MB) and PostScript (1.1 MB).