Aerosol Optical Depth Value-Added Product for the SAS-He Instrument
- Pacific Northwest National Laboratory
- University of Nevada Reno
The Shortwave Array Spectroradiometer – Hemispheric (SAS-He) is a ground-based, shadowband instrument that measures the direct and diffuse solar irradiance. In this regard, the instrument is similar to the Multi-Filter Rotating Shadowband Radiometer (MFRSR) – an instrument that has been in the ARM suite of instruments for more than 15 years. However, the two instruments differ significantly in wavelength resolution and range. In particular, the MFRSR only observes the spectrum in six discrete wavelength channels of about 10 nm width from 415 to 940 nm. The SAS-He, in contrast, incorporates two fiber-coupled grating spectrometers: a Si CCD spectrometer with over 2000 pixels covering the range from 325-1040 nm with ~ 2.5 nm resolution ,and an InGaAs array spectrometer with 256 pixels covering the wavelength range from 960-1700 nm with ~ 6 nm resolution.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- DOE Office of Science Atmospheric Radiation Measurement (ARM) Program (United States)
- DOE Contract Number:
- DE-AC05-7601830
- OSTI ID:
- 1226568
- Report Number(s):
- DOE/SC-ARM/TR-133; PNNL-22846
- Country of Publication:
- United States
- Language:
- English
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