The GOES Imager is a multi-channel instrument designed to sense radiant and solar-reflected energy from sampled areas of the Earth. The multi-element spectral channels simultaneously sweep east-west and west-east along a north-to-south path by means of a two-axis mirror scan system. An imager schematic is given below.
Image provided by: GOES Mission Overview
Text Provided By: GOES Mission Overview
Image provided by: GOES-8 Results (NASA-Goddard)
One such example is this visible full-Earth disc image taken by GOES-8.