WFPC Instrument Science Report 92-11:
The Stability of Measles: an Autocorrelation Analysis
By W.B. Sparks, C. Ritchie, J. MacKenty, S. Baggett
December, 1992
Abstract excerpted from the report:
The amplitude and character of "measles" on the WF/PC-1 have been monitored by studying auto correlation functions for small sub-images. The measles appear to be stable in time after the last decontamination, although with significant changes across decontamination events. The character of the measle profile, although like a diffraction pattern in appearance, does not show the expected wavelength dependence of the far-field diffraction model.
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