Research Staff
NREL's solar radiation research staff is a multi-disciplined team of scientists, engineers, and technicians with experience in measurements and instrumentation for renewable energy research and development.
Mary Anderberg — Scientist II
Mary holds a Bachelor of Science degree and a Master of Science degree in Physics. She performs solar radiometric data quality analysis for the Department of Energy's Atmospheric Radiation Measurement (ARM) program and provides programming support for the resource integration section. She also contributed to the National Solar Radiation Database update. In addition, Mary is the Web site administrator of the Renewable Resource Data Center (RReDC), for which she provides UNIX, C, Perl, and HTML support.
Afshin Andreas — Scientist II
Afshin holds a Bachelor of Science degree in Engineering Physics. He performs calibrations of spectroradiometers in the Optical Metrology Laboratory using National Institute of Standards and Technology traceable lamp standards. Afshin operates spectroradiometers to perform measurements of natural solar radiation and artificial light sources such as solar simulators. He helps maintain the baseline monitoring of solar and meteorological measurements at the Solar Radiation Research Laboratory. His co-development of the Radiometer Calibration and Characterization software enables improved Broadband Outdoor Radiometer Calibration performance. He also developed and maintains the Measurement and Instrumentation Data Center (MIDC) Web site and provides solar radiation resource data to the Renewable Resource Data Center. Afshin has programming skills in C/C++, Perl, HTML, LabWindows/CVI, and Campbell Scientific dataloggers. He also provides application software development for the Department of Energy Atmospheric Radiation Measurement (ARM) program, a climate change research effort.
Pete Gotseff — Senior Research Technician
Pete holds a Bachelor of Science degree in Engineering Physics and Master of Science degrees in Mechanical Engineering and Environmental Science and Engineering. He manages the Electronics Laboratory at the Solar Radiation Research Laboratory and provides research support for the Measurement and Instrumentation Team and other NREL staff. Pete operates and maintains electronic systems for the Baseline Measurement System, rotating shadowband radiometers, and other measurement systems in continuous operation. He installs pyranometers and pyrheliometers, operates absolute cavity radiometers, and provides quality control for the Broadband Outdoor Radiometer Calibration process. He develops programs for Campbell Scientific data loggers, troubleshoots automatic solar trackers, and analyzes solar and infrared irradiance data in support of the Department of Energy Atmospheric Radiation Measurement (ARM) Program sites in the southern Great Plains, tropical Western Pacific, and North Slope of Alaska.
Bev Kay — Senior Research Technician
Bev provides support for Metrology Laboratory technicians and engineers who need calibration of measurement and test instruments. She also maintains the Metrology Laboratory's calibration database, supports the operation of the Solar Radiation Research Laboratory Baseline Measurement System, works with researchers in the Atmospheric Radiation Measurement (ARM) program, and assists with radiometer calibrations.
Daryl Myers — Senior Scientist II
Daryl holds a Bachelor of Science degree in Applied Mathematics from the University of Colorado School of Engineering. He has more than 30 years experience in optical and solar radiation calibration, measurement, data analysis, instrumentation, and uncertainty analysis. His activities support radiometric needs of renewable energy technologies such as terrestrial photovoltaics, solar thermal conversion, and daylighting. He is a member of the American Society for Testing and Materials and the CIE-USA (International Lighting Commission) Division 2 on measurement of radiation.
Ibrahim Reda — Senior Scientist II
Reda holds a Bachelor of Science degree and a Master of Science degree in Electrical Engineering. He manages NREL's Metrology Laboratory for the calibration of NREL's measuring instruments to maintain their traceability to national, international, and consensus standards. Reda also works to improve the uncertainty of measuring outdoor shortwave and longwave irradiance (solar/atmospheric) and assists NREL's staff in measurement techniques, uncertainty analysis, and International Organization for Standardization (ISO) 17025 accreditation. He participates in international pyrheliometer and pyrgeometer comparisons to maintain the traceability of NREL's solar and atmospheric irradiance measurements to the World Radiometric Reference and World Infrared Standard Group.
Tom Stoffel — Senior Section Supervisor II
Tom holds a Bachelor of Science degree in Aerospace Engineering and a Master of Science degree in Meteorology. He has extensive experience at NREL in solar radiation measurements, data, and instrumentation. He manages the Solar Radiation Research Laboratory and maintains baseline monitoring of solar and meteorological variables as well as instruments for maintaining NREL's traceability to international radiometric standards. He has also contributed to the development of solar radiation measurement networks, the evaluation of solar resource models, the production of climate databases, and the development of the center's technical information services. He is also involved in climate change research funded by the Department of Energy.
Steve Wilcox — Senior Engineer II
Steve holds a Bachelor of Science degree in Computer Science. He was the project lead for the updated National Solar Radiation Database (1991–2005) and has been active in developing international solar data sets through work with the World Meteorological Organization. His expertise includes solar radiation measurements and data quality assessment, and he has traveled around the world training scientists and technicians in techniques to improve solar measurements. In addition, he oversees day-to-day calibration operations at the Department of Energy Atmospheric Radiation Measurement calibration facility in Oklahoma and provides programming support for various NREL projects.
Steve started at NREL as an intern and is a strong advocate for mentoring students in renewable energy sciences. He routinely works with students from grade school through graduate school.
