Sky coverage for four-side detectors on 6 (top), 9 (left and middle of bottom row), and 12 (lower right) satellites averaged over one orbit (right). The satellites are distributed differently along each orbital plane, with three different options for the 6 satellites, and two options for 9 satellites. The color-coding provides the number of satellites that see a given GRB at a given time, averaged over one orbital period.