Multifilter Rotating Shadowband Radiometer (MFRSR) Handbook

Hodges, GB ; Michalsky, JJ

Pacific Northwest National Laboratory (U.S.)

关键词: Aerosols;    Manuals;    Wavelengths;    Radiometers;    Water Vapor;   

DOI  :  10.2172/1020261
RP-ID  :  DOE/SC-ARM/TR-059
RP-ID  :  DE-AC05-7601830
RP-ID  :  1020261

美国|英语

来源: UNT Digital Library

【 摘 要 】

The visible Multifilter Rotating Shadowband Radiometer (MFRSR) is a passive instrument that measures global and diffuse components of solar irradiance at six narrowband channels and one open, or broadband, channel (Harrison et al. 1994). Direct irradiance is not a primary measurement, but is calculated using the diffuse and global measurements. To collect one data record, the MFRSR takes measurements at four different shadowband positions. The first measurement is taken with the shadowband in the nadir (home) position. The next three measurements are, in order, the first side-band, sun-blocked, and second side-band. The side-band measurements are used to correct for the portion of the sky obscured by the shadowband. The nominal wavelengths of the narrowband channels are 415, 500, 615, 673, 870, and 940 nm. From such measurements, one may infer the atmosphere's aerosol optical depth at each wavelength. In turn, these optical depths may be used to derive information about the column abundances of ozone and water vapor (Michalsky et al. 1995), as well as aerosol (Harrison and Michalsky 1994) and other atmospheric constituents.