Multiple-instrument-based spectral irradiance of the Moon

A model of lunar spectral irradiance incorporates data from multiple spacecraft and surface telescopic observations. Using 12 sources derived 90,000 images, models that are smooth across both geometry wavelength involve only about 35 coefficients found with a mean weighted residual <0.5 % . An libration orbiter observations is used to reduce the number required. Derivation uses iterative assignment single scaling factor for each band in instrument, which effectively long-term calibration coefficient band. Calibration 26 instruments two other published reveals although eight agree within 3% over 400 840 nm, some large biases exist. The provides sensitive assessment instrument response trends.