Request InfoSpectral Evolution Inc.The UDS-1100 from Spectral Evolution is suited for surface reflectance measurements where it is inconvenient or impractical to take frequent reflectance panel reference scans, especially on days with shifting cloud cover. It measures upwelling and downwelling simultaneously. It can be mounted easily in towers and features built-in DARWin data analysis software that permits automatic reflectance scanning for unattended operation. Spectral range is from 320 to 1100 nm. The software captures and plots upwelling and downwelling at the same time with one measurement. 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