Example window geometry and sampling strategy for a simulated G ≈ 13 source in window class 0 (WC0; upper left) and WC1 (upper right). These particular configurations apply to sources with onboard-estimated G < 13 (WC0) and 13 < G < 16 (WC1), in CCD strips AF2-9. Faint grey lines mark the boundaries between individual samples. The red boxes mark the extent of the window region, with the internal black lines indicating the binning of individual samples. The lower panels depict the resulting downlinked 2D (left) and 1D (right) observations.