Near-IR Spectrum from Huygens

ESA has released a plot, shown above, of the near-IR spectrum of Titan taken by Huygens from three heights: 150 km, 500 m, and 20 m. The last altitude had the lamp on and mostly represents the spectrum of the surface, not the combined spectrum of the atmosphere and the surface. The spectrum at 500 m is darker due to the increased methane absorption at lower altitudes, and the fact that the 150 km spectrum was taken over a bright region, as opposed to the 500 meter spectrum. Nothing major really jumps out though many of the non-methane related features are consistent with water ice.