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Final Report: DE-A102-04ER63766
PI: Peter Pilewskie, NASA Ames Research Center
During the 1-year duration of this project a new Shortwave Spectrometer (SWS) was designed and
developed for deployment at the Southern Great Plains Central Facility to measure zenith solar spectral
radiance. The SWS is comprised of two Zeiss miniature monolithic spectrometers (MMS-1 and MMS-
NIR) for visible and near-infrared detection in the wavelength range between 350 and 2250 nm. Spectral
resolution is 8 nm for the MMS-1 and 12 nm for the MMS-NIR. The light collector is a narrow field of
view (+1.5 2) collimator at the front end of a high-grade custom-made fiber optic bundle. The data
acquisition and control system is a 933 MHz Pentium based PC in a PC104 format with a USB interface
between the computer and the spectrometers. Spectral sampling rate is approximately 1 Hz.
A prototype SWS was deployed at SGP in November and December 2004 and it collected zenith-sky solar
spectra at 1 Hz continuously over a 29 day period. Prior to deployment it was calibrated and
characterized at the NASA Ames Airborne Sensor Facility (ASF) using a 30 inch Integrating Sphere. The
SWS was also calibrated using a portable 12 inch integrating sphere at the Central Facility. The testing
and calibration procedures were developed during this implementation. The planning and scheduling for
permanent installation of the new SWS as well as data processing, calibration, archiving, and distribution
was conducted.
Presentations
Pommier, J., P. Pilewskie, and W. Gore, A new Shortwave Spectrometer for SGP, DOE ARM Science Team
Meeting, Daytona Beach, FL, March 2005.
Harder, J., J. Fontenla, G. Kopp, G. Rottman, E. Richard, and P. Pilewskie, Measuring Solar Irradiance
from Space: The SOlar Radiation and Climate Experiment, DOE ARM Science Team Meeting, Daytona
Beach, FL, March 2005.
Pilewskie, P., Overview of the Radiation Budget in the Lower Atmosphere, Earth's Radiative Energy
Budget Related to SORCE, San Juan Islands, Washington, September 20-22, 2006
Pilewskie, P., J. Harder and J. M. Fontenla, A new solar irradiance reference spectrum, 12th Conference
on Atmospheric Radiation, Madison, WI, July 10-14, 2006.
0. Hofmann, P. Pilewskie, B. Kindel, W. Gore, P. Russell, J. Livingston, J. Redemann, R. Bergstrom, S.
Platnick, J. Daniel, and T. Garrett ,Cloud Properties Derived from Visible and Near Infrared
Reflectance in the Presence of Aerosols
Pilewskie, P., J. Harder and J. M. Fontenla, A new solar irradiance reference spectrum, Proceedings of
the Sixteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting, Albuquerque,
New Mexico, March, 2006
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Pilewskie, Peter. Final Technical Report, report, May 27, 2009; United States. (https://digital.library.unt.edu/ark:/67531/metadc925839/m1/1/: accessed June 12, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.