![]() Purposes, we provide the Thekaekara spectrum as published in Table 4.5, of The 1973 spectrum was the basis for ASTM E490 from 1974 to 2000. Thekaekara was instrumental in publishing some of the earliest air mass zero The SMARTS files are available as a text file or in a compressed format.ĭr. Have been converted to nanometers for these files to provide consistent units. The files used in the SMARTS model are in wavelength units of Angstroms (Å), which Spectrum of his own based on measurements and papers for use with SMARTS. SChKur, SCebKur, SNewKur, SThKur, and SOldKur. To use in the SMARTS spectral modeling code. These provide user choices for extraterrestrial Gueymard resampled all the MODTRAN spectra to produce irradiance (W m -2 nm -1) data at 2002 discrete wavelengths. The resampling computed the equivalent average energy in the SMARTS2 bandįrom the higher resolution MODTRAN data within the SMARTS2 band by integration overĭr. To 1700 nm, and 5 nm resolution between 1700 nm and 4000 nm, with a transition wavelengthĪt 1702 nm. The MODTRAN extraterrestrial spectra were resampled for use with the SMARTS spectralĬode to 0.5 nm resolution between 280 nm and 400 nm, 1.0 nm resolution from 400 nm ![]()
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