Adams diffuse reflectance (0.35-2.5 microns)

Directional hemispheric (diffuse) reflectance spectra of lunar samples measured by John B. Adams (currently at Department of Geological sciences, Washington University, Seattle, WA 98195). These data were acquired using a Beckman Dk-2A, using both gold and smoked MgO as standards, during the 1970's.

Examples of these spectra are reported in a series of science articles:


Directional hemisphere (diffuse) reflectance spectra with wavelength corrections based on interlaboratory comparisons for several samples. The function used was an inverse tangent relationship in energy space yielding a correction of between +10-15 nanometers in the .9 to 2.6 micron region. The error in the visible is negligible.

Wavelength Corrected Directional Hemispheric Data