Illustration of two RVS windows overlapping and how they are truncated at readout. The vertical axis is an example pixel number in the spatial AC direction. Prior to truncation, the nominal ten-AC pixel extent of the green and yellow windows are[48.5,58.5] and [47.5,57.5] pixels, respectively. Because they overlap each other in AC, the green and yellow shading delineates the AC truncation at readout. The truncated green and yellow windows have five and six AC pixels, respectively.The macrosamples are numbered along the bottom. The top and bottom diagonal lines track the AC peak of the spectrum in the green and yellow windows, respectively.