Synthetic WASP-43b model. The sketch at top left depicts the partitioning of the planetary model (16 longitudinal slices, each with a uniform temperature profile and composition). The bottom left panel shows the temperature profile of the 16 slices color-coded by orbital phase (color bar on the far right). The right panel shows the disk-integrated emission spectra as observed at 16 phases along the orbit. The inset shows the volume-mixing ratios of the spectroscopically active molecules.