Combining New and Legacy Instruments Yields Routine Measurements of Absolute Spectral Radiation Spanning the Thermal IR, Near-IR, Visible, and UV

Connor Flynn Pacific Northwest National Laboratory
James Barnard University of Nevada Reno
Derek Hopkins Pacific Northwest National Laboratory
Albert Mendoza Pacific Northwest National Laboratory
Danny Nelson Pacific Northwest National Laboratory
Randy Norheim Pacific Northwest National Laboratory
Luc Rochette LR Tech Inc.
André Lanouette LR Technologies, Inc.
Michel Gaudreau LR Technologies, Inc.

Category: Instruments

New spectral radiometers deployed at the ARM Climate Research Facility this year represent a major expansion in terms of the breadth of continuous spectral radiation measurements. The Shortwave Array Spectrometer measuring zenith spectral radiance from 350 nm to 2.1 microns has been repaired, recalibrated, and redeployed to SGP. Two new Shortwave Array Spectrometer – Zenith (SAS-Ze) instruments have been received measuring zenith spectral radiance over a slightly reduced spectral range of 350 nm to 1.7 microns but with improved resolution and sensitivity. One of the SAS-Ze is deployed at SGP, while the second is awaiting deployment with AMF1 in Nainital, India in support of GVAX. Two new Shortwave Array Spectrometer – Hemispheric (SAS-He) instruments measuring the direct solar and diffuse hemispheric spectral irradiance over the sample spectral range have also been received and will be collocated with the SAS-Ze systems. The SAS-He instrument at SGP complements the existing rotating shadowband spectrometer (RSS), overlapping the wavelength range in the UV and visible and extending it to the near-IR. Rapid-sampling FTS providing measurements of absolutely calibrated zenith radiance over the thermal IR spectral range from 3–19 microns have also been received, including the ASSIST II instrument installed with the AMF2 and operating at the Thunderhead site in support of the STORMVEX field campaign. Preliminary data sets from each of these new instruments are reported.

This poster will be displayed at ASR Science Team Meeting.