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Water feature on the Moon as seen by M3

Water feature on the Moon as seen by M3
Water feature on the Moon as seen by M3 This version of the Moon Mineralogy Mapper data represents the strength of a spectral absorption feature at 3 microns, which indicates the presence of water or hydroxyl in the surface soil. The blue arrow points to Goldschmidt, a relatively fresh crater in the lunar highlands that has a relatively strong water/hydroxyl signature. This image was calculated from the M3 spectral data using the following mathematical expression: 1 - [(average of reflectance at 2896 and 2936 nm) / (average of reflectance at 2617, 2657, and 2697 nm)]. The 2896 and 2936 nm reflectance is at the position of the water absorption feature; the 2617, 2657, and 2697 nm reflectance is outside the position of the water absorption feature. The deeper the water absorption feature is at any point, the brighter the above image is at that point. ISRO / NASA / JPL-Caltech / Brown University