EXES radiance, integrated over the 1383–1391 cm⁻¹ range, as a function of the pixel number along the slit. Black: first scan (interrupted) recorded along the disk center (357° W longitude). Red: “left” scans (centered around 15° W longitude). Blue: “right” scans (centered around 345° W longitude). There is considerable uncertainty on the position of the slit with respect to the Martian disk.