Rotational light curves of the mid-infrared radiation emitted from the Earth. 2001 January (top row) and July (bottom row) for the latitudes 90°N, 60°N, 30°N, 0°, 30°S, 60°S, and 90°S latitudes, the colors correspond to local hours, 0 hr (black), 6 hr (blue), 12 hr (green), and 18 hr (red) and the direction planes of opposition (O), conjunction (C), western quadrature (WQ), and eastern quadrature (EQ).