Solar Direct Normal Irradiance (DNI) represents the direct solar component and contains about 80% of the total solar energy budget on earth. Outside the atmosphere (AM0) the solar irradiance is considdered as a constant (1367 W/m2) that slightly fluctuates with a 11 year cycle. The DNI at the earth surface is highly variable due to the atmospheric conditions (clouds, aerosols, water vapor and molecules).
By EKO Instruments based in San Jose, CALIFORNIA (USA).
MSP’s aerosol instrument products include cascade impactors, virtual-impactor concentrators, personal PM samplers, micro-environmental PM Samplers, condensation particle counters, an asbestos fiber monitor, aerosol generators, electrical ionizers, differential mobility analyzers, laser particle counters and wide range particle spectrometers.
By MSP Corporation based in Shoreview, MINNESOTA (USA).
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