Observing aerosol optical depth with MFRSR

Abstract

Abstract:

MFRSR (multi-filter rotating shadow-band radiometer) is a ground-based instrument and used to make measures of irradiance and aerosol. It uses automated rotating shadow-band technique to alternatively make measurements of total horizontal and diffuse horizontal irradiances at seven wavelengths simultaneously, and then deduce direct normal irradiance. In addition to broadband Silicon detector measures total solar irradiance, center wavelengths of the other six wave bands are 414.3nm, 495.3nm, 613.7nm, 671.5nm, 867.6nm and 939.3nm. This paper introduces the instrument of MFRSR, the method of calibration and data processing, and then analyses statistical properties of aerosol using observation of MFRSR during 2004-2005 in Xianghe. In order to illuminate the reliability of observing aerosol optical depth with MFRSR, we compare the results of MFRSR with AERONET data. It shows the mean differences of the two results respectively are -0.021，-0.009，-0.004 at the wavelengths of 500nm, 670nm, 870nm, and the standard deviations are 0.067，0.051，0.050. The reasons for deviation of the two are also discussed.

Key words: MFRSR, calibration, aerosol optical depth

WANG Li-Ping, ZHAO Feng-Sheng, LI Zhan-Qing. Observing aerosol optical depth with MFRSR[J]. J4, 2010, 27(2): 234-241.

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