Non-Linearity Correction Algorithm for the WFC3 IR Channel

Details Non-Linearity Correction Algorithm for the WFC3 IR Channel Non-Linearity Correction Algorithm for the WFC3 IR Channel

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004wfc..rept....6h&link_type=abstract

Instrument Science Report WFC3-2004-06, 9 pages

Physics

Hubble Space Telescope, Hst, Space Telescope Science Institute, Wide Field Camera 3, Wfc3, Ir Channel, Correction Algorithm

Scientific paper

WFC3 IR channel data are obtained in the form of multiple, non-destructive readouts, grouped into "ramps" , similar to the method employed by NICMOS. This strategy facilitates the characterization of the non-linearity of the IR Focal Plane Array (FPA), as the detector's response to a steady signal can be measured multiple times, until the detector becomes saturated. Using test data collected in this manner, the determination of correction coefficients for non-linearity in the WFC3 IR channel is performed through polynomial fits to the measured and ideal signal levels.

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