... The measured wavefront errors in the four cameras were 1/30, 1/17, 1/40, and 1/21 waves at 6328е. The dominant problem was a small difference in focus between the four cameras (Krist and Burrows 1995). The actuated fold mirrors and pick-off mirror mechanism performed flawlessly in correcting residual coma aberrations in the image, and enabled the on-orbit alignment procedures. ... Table 5.2: Aberrations in Each Camera. ... Aberration . ... 0.0000 . ... 0.0034 . ... 0.0180 . ... 0.0794 . ...
ST-ECF Instrument Science Report WFC3-2008-16 The TV3 ground calibrations of the WFC3 NIR grisms H. Kuntschner, H. Bushouse, J. R. Walsh, M. KЭmmel July 10, 2008 ABS TRACT Based on thermal vacuum tests (TV3; March/April 2008), the performance of the WFC3 near-IR G102 and G141 grisms together with the new IR detector (IR4; FPA165) has been assessed. ... 6 ST-ECF Instrument Science Report WFC3-2008-16 Figure 2: Instrument efficiency of various orders for the WFC3 G141 grism as function of wavelength. ...
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