Shortwave Spectroradiometer (SWS) Handbook

Pilewskie, P ; Pommier, J

Pacific Northwest National Laboratory (U.S.)

关键词: Spectrometers;    Manuals;    Wavelengths;    Collimators;    Personnel;   

DOI  :  10.2172/1020259
RP-ID  :  DOE/SC-ARM/TR-062
RP-ID  :  DE-AC05-7601830
RP-ID  :  1020259

美国|英语

来源: UNT Digital Library

【 摘 要 】

The Shortwave Spectroradiometer (SWS), measures the absolute visible and near infrared spectralradiance (units of watts per meter square per nanometer per steradian) of the zenith directly above the instrument. The SWS is a moderate resolution sensor comprised of two Zeiss spectrometers (MMS 1 NIR enhanced and NIR-PGS 2.2) for visible and near-infrared detection in the wavelength range 350 – 2170 nm. The sampling frequency is 1 Hz. The spectral resolution is 8 nm for the MMS 1 NIR and 12 nm for the NIR-PGS 2.2. The light collector is a narrow field of view (1.4°) collimator at the front end of a high-grade custom-made fiber optic bundle. The SWS does daily daytime measurements. The SWS is located in a darkroom, constructed by Southern Great Plains (SGP) site personnel within the optical trailer, to permit calibrations to be conducted without the necessity of moving the instrument to a different location. Calibrations are performed at regularly scheduled times using the ARM 12” integrating sphere.