The Satlantic Micro-Profiler II is a type of profiling radiometer system. The primary optical measurements are downwelling irradiance (Ed) and upwelling radiance (Lu).The Micro-Pro collects measurements in the following wavelengths: 305, 325, 340, 380, 412, 443, 490, 510, 555, 665, and 683. (Note the additional UV channel).