Engineering Physics Annotation << Back NEW METHOD FOR MEASUREMENT OF DIRECT NORMAL SOLAR RADIATION H.H. ASADOV, I.KH. AGAEV, N.G. JAVADOV In the article the new method for calibration of pyrheliometers on direct normal solar radiation is suggested. The proposed method provides for non-dependence of the calibration result on optical thickness of pure atmosphere integrated on whole spectrum, which makes it possible to increase the accuracy of measurements. Keywords: solar radiation, calibration, solar constant, atmospheric turbidity. E-mail: asadzade@rambler.ru