Frank Vignola
| Former director, | University of Oregon (1980 - 2023) |
| Solar Radiation Monitoring Laboratory |
UO faculty: member since 1977
Rank: Senior Research Associate
Degrees
| B.A., | University of California, Berkeley, Physics, 1967 |
| M.S., | University of Oregon, Physics, 1969 |
| Ph.D., | University of Oregon, Physics, 1975 |
Positions
| Senior Research Associate | Physics Department, University of Oregon 1984-present | |
| Visiting Assistant Professor | Physics Department, University of Oregon, 1986, 1987, 1988 | |
| Research Associate | Physics Department, University of Oregon, 1977-1984 |
Memberships
International Solar Energy Society
Fellow, American Solar Energy Society
Awards
2020 Charles Greeley Abbot Award, American Solar Energy Society
Professional activities
| • | Associate Editor for Resource Assessment for Solar Energy, 2007 to 2020. Reviewer for Solar Energy, 1982-1990, 1994-2007. Associate Editor for resource assessment for Solar Energy's special ISES conference Harrare Edition, 1995-1996. |
| • | Discussion of currently used practices for: Creation of Meteorological Data Sets for CSP/STE Performance Simulations, (Kristian Pagh Nielsen, Philippe Blanc, Frank Vignola, Lourdes Ramirez, Manuel Blanco, Richard Meyer), SolarPACES Report, 2017. |
| • | New Methodology for Adjusting Rotating Shadowband Irradiometer Measurements, (Frank Vignola, Josh Peterson, Stefan Wilbert, Philippe Blanc, Norbert Geuder, and Chris Kern) 22nd SolarPACES Conference 2016, Oct 2016, Abu Dhabi, United Arab Emirates. |
| • | Excerpts from the Report: BeyondTMY Meteorological Data Sets for CSP/STE Performance Simulations, (Kristian Pagh Nielsen, Philippe Blanc, Frank Vignola, Lourdes Ramirez, Manuel Blanco, Richard Meyer) 22nd SolarPACES Conference 2016, Oct. 2016, Abu Dhabi, United Arab Emirate. |
| • | Board member of the Resource Assessment Division of the American Solar Energy Society (ASES) 1986-1989, 1992-1993, 1995-1996. Vice-Chair in 1988, 2002 and Chair in 1989, 2003. |
| • | Founder and Editor of Solar Spectrum, newsletter for the Resource Assessment Division of ASES 1988-2006. Editor of Solar Rising, newsletter for the Oregon Solar Energy Industries Association 1998-2006. |
| • | Board member of the American Solar Energy Society, 1989-1991, 2002. Chair of the Issues and Technical Assessment Committee of ASES, 1989-1996. Member of the Technical Review Committee for ASES's annual conference in 1990, 1993, and 1995. Technical Review Committee Chair for SOLAR '94 and SOLAR 2004. Member of National, State, and Local Policy Committee of ASES, 1996-present. Board member of the Solar Energy Industries Association 2000. |
| • | Recipient of the 1996 ASES special recognition award for outstanding volunteer service. |
| • | Organized and led the 1997 Pacific Northwest Radiometer Workshop in Eugene, Oregon and the 2002 Use of Solar Radiation Data Workshop in Eugene, Oregon. |
Research goals
| • | Create a sound solar resource assessment data base in the Pacific Northwest to facilitate the deployment of solar electric technologies. |
| • | Develop tools to facilitate the use of solar radiation data. |
| • | Operate a high quality outdoor PV module testing lab for education and as a fee for service facility. |
| • | Produce and support a solar education kit with curriculum to energize and excite the next generation. |
| • | Offer workshops and educational material on the use of the solar radiation data base. |
| • | Provide consulting on the development and deployment of solar energy technologies. |
Selected publications
| 2021 | An Evaluation of the Spectral Irradiance Data from the NSRDB (Yu Xie, Aron Habte, Manajit Sengupta, and Frank Vignola). Technical Report NREL/TP-5D00-80439, September 2021. |
| 2021 | Influence of Diffuse and Ground-Reflected Irradiance on the Spectral Modeling of Solar Reference Cells, (Frank Vignola, Josh Peterson, Rich Kessler, Sean Snider, Peter Gotseff, Aron Habte, Afshin Andreas, Manajit Sengupta, and Fotis Mavromatakis. ASES National Solar Conference Proceedings, Boulder, Colorado |
| 2020 | Evaluation of Solar Reference Cells on a Two-Axis Tracker Using Spectral Measurements, (Frank Vignola, Josh Peterson, Rich Kessler, Sean Snider, Afshin Andreas, Aron Habte, Peter Gotseff, Manajit Sengupta, and Fotis Mavromatakis) SolarPACES 2020, Albuquerque, New Mexico |
| 2020 | Structure of a comprehensive solar radiation dataset, (Josh Peterson and Frank Vignola) Solar Energy 211, 15 November 2020, Pages 366-374 |
| 2018 | Evaluation of Photodiode-based Pyranometers and Reference Solar Cells on a Two-Axis Tracking System, (Frank Vignola, Josh Peterson, Rich Kessler1, Mike Dooraghi, Manajit Sengupta, and Fotis, Mavromatakis) 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) Waikoloa, HI |
| 2017 | Low irradiance losses of photovoltaic modules, (Fotis Mavromatakis, Frank Vignola, and Bill Marion) Solar Energy 157, pp 496-506, 2017. |
| 2017 | Comparison and Analysis of Instruments Measuring Plane of Array Irradiance for One-Axis Tracking PV Systems, (Frank Vignola, Chun-Yu Chiu, Josh Peterson, Michael Dooraghi, and Manajit Sengupta) Conference Proceedings 44th IEEE PVSC National Solar Conference 2017, Washington, DC, June, 2017. |
| 2017 | Comparison of Pyranometers and Reference Cells on Fixed and One-axis Tracking Surfaces, (Frank Vignola, Josh Peterson, Chun-Yu Chiu, Michael Dooraghi, Manajit Sengupta, and Fotis Mavromatakis) Conference Proceedings ASES National Solar Conference 2017, Denver, CO, October 2017. |
| 2017 | Structure of a comprehensive solar radiation dataset (Josh Peterson and Frank Vignola) Conference Proceedings ASES National Solar Conference, 2017, Denver, CO. |
| 2017 | Developing a Spectroradiometer Data Uncertainty Methodology, (Josh Peterson, Frank Vignola, Aron Habte, Manajit Sengupta) Solar Energy, 2017. |
| 2017 | Performance Evaluation of Radiation Sensors for the Solar Energy Sector, (L. Vuilleumier, C. Félix, F. Vignola, P. Blanc, J. Badosa, A. Kazantzidis and B. Calpini), Meteorologische Zeitschrift, PrePub DOI 10.1127/metz/2017/0836 |
| 2016 | Effects of Changing Spectral Radiation Distribution on the Performance of Photodiode Pyranometers. (Frank Vignola, Zachary derocher, Josh Peterson, Laurent Vuilleumier, Christian Felix, Julian Grobner, and Natalia Kouremeti), Solar Energy, Volume 129, May 2016, Pages 224-235. |
| 2016 | Modeling Photovoltaic Power, (Fotis Mavronmatakis, Yannis Franghiadakis, and Frank Vignola), Engineering, Technology, and Applied Science Research, Volume 6, No. 5, 2016 pp 1115-1118. |
| 2016 | Uncertainty of rotating shadowband irradiometers and Si-pyranometers including the spectral irradiance error, (Stephan Wilbert, Stefan Kleindiek, Bijan Nouri, Norbert Geuder, Aron Habte, Marko Schwandt, and Frank Vignola), AIP Conference Proceedings, Volume 1734, Issue 1, id.150009, May. 2016 |
| 2016 | Use of Pyranometers to Estimate PV Module Degradation Rates in the Field ( Frank Vignola, Josh Peterson, Rich Kessler, Fotis Mavromatakis, Mike Dooraghi, and Manajit Sengupta,), 43rd IEEE PVSC, Portalnd, Oregon, 2016 |
| 2014 | PV Module Performance After 30 Years Without Washing, InterSolar North America, San Francisco, CA, (2014) (with Joshua Peterson, Rich Kessles, Fuding Lin, Bill Marion, Allan Anderberg, and Fotis Mavromatakis) |
| 2014 | Effects if Changing Spectral Radiation Distribution on the Performance of Photodiode Pyranometers, InterSolar North America, San Francisco, CA (2014) (with Zachary Derocher, Josh Peterson, Laurent Vuilleumier, Christian Felix, Julian Grobner, and Natalia Kouremeti) |
| 2014 | Measuring and Estimating the Temperature of Photovoltaic Modules, Solar Energy, (2014) (with F. Mavromatakis, E. Kavoussanaki, and Y. Franghiadakis) |
| 2014 | Accuracy of Ground Surface Broadband Shortwave Radiation Monitoring, JGR: Atmosphere, (2014) (with L. Vuilleumier, M. Hauser, C. Felix, P. Blanc, A. Kazantzidis, and B. Calpini) |
| 2014 | New Data Set for Validating PV Module Performance Models, Proc. IEEE PVSC, Denver, CO, June 2014) (with Bill Marion, Allan Anderberg, Chris Deline, Joe del Cueto, Matt Muller, Greg Perrin, Jose Rodriguez, Steve Rummel, Timothy J. Silverman, Rich Kessler, Josh Peterson, Steve Barkaszi, Mark Jacobs, Nick Riedel, Larry Pratt, and Bruce King) |
| 2014 | Modelling The Power Produced By Photovoltaic Systems, Qatar Foundation Annual Research Conference, Nov.13, 2014 (Frank Vignola and Fotis Mavromatakis) |
| 2014 | New data set for validating PV module performance models,2014 IEEE 40th Photovoltaic Specialist Conference (PVSC), (Frank Vignola, Chris Deline, and Matt Muller) |
| 2013 | Solar Energy Forecasting and Resources Assessment, Elsevier Press, 2013, Evaluation of Resource Risk In Solar-Project Financing - chapters 4, and Bankable Solar-Radiation Datasets Chapters 4 & 5 (with Cathy Grover and Andrew McMahan) |
| 2013 | Providing High Quality Data to Develop and Validate PV Models, Solar 2013, American Solar Energy Society, Baltimore, MD, (2013) (with Rich Kessler, Fuding Lin, Bill Marion, and Josh Peterson) |
| 2013 | Bankable Solar-Radiation Datasets, Solar Energy Forecasting and Resource Assessment(2013) Chapter 4 & 5 |
| 2012 | Solar and Infrared Radiation Measurements, CRC Press, 2012 (with Joseph Michalsky and Thomas Stoffel) |
| 2012 | Building a bankable solar radiation dataset, Solar Energy (2012) (with Cathy Gover, Nick Lemon, and Andrew McMahan) |
| 2012 | Spectral Distributions of Diffuse and Global Irradiance for Clear and Cloudy Periods, Proceedings of the World Energy Forum, Denver, CO. (2012) (with Gina Blackburn) |
| 2012 | GHI Corrleations with DHI and DNI and the Effects of Cloudiness on one-minute Data, Proceedings of the World Energy Forum, Denver, CO. (2012) |
| 2012 | Building a bankable solar radiation dataset, Solar Energy, Engineering, Probability, Solar Energy, Generation, Financing, and 1 more. |
| 2012 | Spectral Distributions of Diffuse and Global Irradiance for Clear and Cloudy Periods, An LI1800 Portable Spectroradiometer is used to measure solar spectral irradiance for solar zenith angles of 53.5 degrees to 86.3 degrees during the months of January, February, and March. Data is collected showing global horizont... more abstract. |
| 2011 | Building a Bankable Solar Radiation Dataset, Proc. Solar 2011, American Solar Energy Society, Raleigh, NC, (2011) (with Cathy Grover, Nick Lemon) |
| 2011 | Characterizing the Performance of an Eppley Normal Incident Pyrheliometer, Proc. Solar 2011, American Solar Energy Society, Raleigh, NC, (2011) (with Fuding Lin) |
| 2010 | Evaluating Calibrations of Normal Incident Pyrheliometers, Proc. SPIE Conference, San Diego, CA, (2010) (with Fuding Lin) |
| 2010 | Energizing the Next Generation with Photovoltaics, Proc. Solar 2010, American Solar Energy Society, Phoenix, AZ, (2010) (with Stanley Miklavzina, Sam Daniels, Mike Toamina, Sadie Thorin, Igor Tyukhov, and Anton Tikhonov) |
| 2010 | Evaluation of a Prototype Solar Awning, Proc. Solar 2010, American Solar Energy Society, Phoenix, AZ, (2010) (with Peter Harlan, Rich Kessler, Ihab Elzeyadi, Bob Simonton, and Fotis Mavromatakis) |
| 2009 | Modeling of solar irradiance using satellite images and direct terrestrial measurements with PV modules, Optical Modeling and Measurements for Solar Energy Systems III, Solar Energy, Real Time, Solar radiation, Surface Area, PV cell/module, and 2 more (Igor Tyukhov and Frank Vignola) |
| 2009 | Journal's performance and publication criteria, Solar Energy, Engineering and Solar Energy |
| 2009 | Testing a Model of IR Radiative Losses, Proc. SPIE Conference, San Diego, CA, (2009) (with Charles N. Long, Ibrahim Reda) |
| 2009 | Measuring Degradation of Photovoltaic Module Performance in the Field, Proc. Solar 2009, American Solar Energy Society, Buffalo, NY, (2009) (with Jim Krumsick, Fotis Mavromatakis, and Robert Walwyn) |
| 2008 | Modeling of Solar Irradiance Using Satellite Images and Direct Terrestrial Measurements with PV Modules, Proc. SPIE Conference, San Diego, CA (2009) (with Igor Tyukhov, Michael Schakhramanyan, Dmitry Strebkov, Anton Tikhonov) |
| 2008 | Analyzing the contribution of aerosols to an observed increase in direct normal irradiance in Oregon, J. Geophys. Res., 114, D00D02, doi:10.1029/2008JD010970 (with L.D. Riihimaki, and C. N. Long) |
| 2008 | Modeling IR Radiative Loss from Eppley PSP Pyranometers Proc. SPIE Conference, San Diego, CA, (2008) (with Chuck Long and Ibrahim Reda) |
| 2008 | Establishing a Consistent Calibration Record for Eppley PSPs Proc. of the 37th ASES Annual Conference San Diego, CA, (2008) (with Laura Riihimaki) |
| 2008 | Performance of PV Inverters Proc. of the 37th ASES Annual Conference, San Diego, CA, (2008) (with Fotis Mavromatakis and Jim Krumsick) |
| 2008 | Combined solar PV and Earth space monitoring technology for educational and research purposes Proc. of the 37th ASES Annual Conference, San Diego, CA (2008) (with Igor Tyukhov, Michael Schakhramanyan, Dmitry. Strebkov, and Sergey Mazanov) |
| 2008 | Evaluation of Methods to Correct for IR Loss in Eppley PSP Diffuse Measurements Proc. SPIE Conference, San Diego, CA, (2008) (with Chuck Long and Ibrahim Reda) |
| 2007 | Analysis of satellite derived beam and global solar radiation data, Solar Energy 81, 768-772 (2007) (with Peter Harlan, Richard Perez, and Marek Kmiecik) |
| 2007 | Analyzing Surface Solar Flux Data in Oregon for Changes Due to Aerosols, Agu Fall Meeting Abstracts, The radiative impact of anthropogenic aerosol concentrations could be an important forcing to the earth's surface energy budget. That impact is uncertain, however, in large part because of a lack of aerosol measu... more abstract, Time Series, Solar radiation, Radiative Transfer, Oregon, Surface Energy, and 2 more, Dec 1, (2007) |
| 2007 | Evaluation of methods to correct for IR loss in Eppley PSP diffuse measurements, Optical Modeling and Measurements for Solar Energy Systems, Solar Energy and Relative Humidity |
| 2007 | Shading on PV Systems: Estimating the Effect Proc. of the 36th ASES Annual Conference, Cleveland, OH, (2007) |
| 2007 | Discussion of PV Lab Equipment and Photovoltaic Systems for Teaching the Science of Photovoltaics Proc. of the 36th ASES Annual Conference, Cleveland, OH, (2007) (with Igor Tyukhov) |
| 2007 | Completing Production of the Updated National Solar Radiation Database for the United States Proc. of the 36th ASES Annual Conference, Cleveland, OH, (2007) (with S. Wilcox, M. Anderberg, R. George, W. Marion, D. Myers and D. Renne', National Renewable Energy Laboratory; N. Lott and T. Whitehurst, National Climatic Data Center; W. Beckman, University of Wisconsin; C. Gueymard, Solar Consulting Services; R. Perez, State University of New York at Albany; P. Stackhouse, National Aeronautics and Space Administration) |
| 2007 | Analysis of satellite derived beam and global solar radiation data, Engineering, Bias, Solar Energy, Standard Deviation, Pacific Northwest, and 9 more, Solar Energy (Frank Vignola and Peter Harlan) Images from the GOES 8 satellite were used along with auxiliary information such as snow cover to produce an hourly solar radiation database on a 0.1 degrees grid for the Pacific Northwest from 1998 through 2002 [Perez, R., ... more abstract] |
| 2007 | Trends in direct normal irradiance in Oregon: Comparison of surface measurements and ISCCP-derived irradiance, Geophysical Research Letters, Climatology, Multidisciplinary, Seasonality, Volcanoes, Projects, and 7 more |
| 2006 | Long-Term Variability of Global and Beam Irradiance in the Pacific Northwest Proc. of the 35th ASES Annual Conference, Denver, CO, (2006) (with Laura Riihimaki, Lohmann, L.S., and Meyer, R., Perez, R) |
| 2006 | Removing Systematic Errors from Rotating Shadowband Pyranometer Data Proc. of the 35th ASES Annual Conference, Denver, CO (2006) |
| 2006 | AEC Photovoltaic Test Facility - First Year Test Data Proc. of the 35th ASES Annual Conference, Denver, CO, (2006) (with J. Krumsick and R. Kessler) |
| 2006 | Towards Production of an Updated National Solar Radiation Data Base Proc. of the 35th ASES Annual Conference, Denver, (2006) (with Wilcox, S., Anderberg, M., George, R., Marion, W., Myers, D., Renne, D., Beckman, W., DeGaetano, A., Gueymard, C., Perez, R., Lott, N., Stackhouse, Jr., P. |
| 2005 | Progress Toward an Updated National Solar Radiation Data Base, Solar Radiation, Progress is reported on an updated National Solar Radiation Database (NSRDB). Focus on this year's work was on preparing a test-year database for evaluating several solar radiation ... more abstract |
| 2005 | Trends in Direct Normal Solar Irradiance in Oregon from 1979-2003, To better understand the characteristics of the region's s olar resource, a preliminary study was undertaken of trends in direct normal irradiance from three sites around Oregon over a period of 25 years. An ove... more abstract. Data Analysis, Seasonality, Pacific Northwest, Solar radiation, Oregon, and 2 more |
| 2005 | Progress on an Updated National Solar Radiation Data Base for the United States, Solar radiation (Chris Gueymard and Frank Vignola) |
| 2005 | Converting Sunlight into Electricity Green + Solar Building Oregon, pp. 22-23, 3EStrategies and the Oregon Department of Energy, (2005) |
| 2005 | Trends in Direct Normal Solar Irradiance in Oregon from 1979-2003 Proc. Solar World Congress, International Solar Energy Society, 2005 (with L. Riihimaki) |
| 2004 | Solar Resource GIS Data Base for the Pacific Northwest using Satellite Data, Final Report, 2004, DOE DE-PS36-0036-00GO10499.(2004) (with Richard Perez) |
| 2004 | Status of High Resolution Solar Irradiance Mapping From Satellite Data, Proc. Solar 2004, American Solar Energy Society Conf., Portland, OR. (2004) (with R. Perez, M. Kmiecik, K. Moore, S. Wilcox, R. George, D. Renne, P. Ineichen) |
| 2004 | Update of Algorithm to Correct Direct Normal Irradiance Measurements Made with a Rotating Shadow Band Pyranometer, Proc. Solar 2004, American Solar Energy Society Conf., Portland, OR. (2004) (with J. Augustyn, T. Geer, T. Stoffel, R. Kessler, E. Kern, R. Little, B. Boyson) |
| 2004 | Using Sun Path Charts to Estimate the Effect of Shading on PV Arrays, Proc. Solar 2004, American Solar Energy Society Conf., Portland, OR. (2004) |
| 2004 | A Lesson in Green, Solar Today, March/April 2004, (with G. Z. Brown, L. R. Kahle, & E. J. Wright) |
| 2003 | Beam Tilted Correlations, Proc. Solar 2003, American Solar Energy Society Conf., Austin, TX. (2003) |
| 2002 | A New Operational Satellite-to-Irradiance Model Description and Validation, Proc. Solar 2002, American Solar Energy Society Conf., Reno, NV. (2002) (with Perez R., P. Ineichen, K. Moore, M. Kmiecik, C. Chain, R. George) |
| 2002 | Improving the Accuracy of Low Cost Measurement of Direct Normal Solar Irradiance, Proc. Solar 2002, American Solar Energy Society Conf., Reno, NV. (2002) (with J. Augustyn, T. Geer, T. Stoffel, R. Kessler, E. Kern, R. Little) |
| 2001 | Solar Resource Assessment A Review. Solar Energy-The State of the Art, Chapter 10 (pp. 497-575) James & James, London (2001) (with Perez, R., R. Aguiar, M. Collares-Pereira, D. Dumortier, V. Estrada-Cajigal, C. Gueymard, P. Ineichen, P. Littlefair, H. Lund, J. Michalsky, J. A. Olseth, D. Renne, M. Rymes, A. Skartveit, A. Zelenka) |
| 2001 | Variability of Solar Radiation over Short Time Intervals, Proc. Solar 2001, American Solar Energy Society Conf., Washington, D.C. (2001) |
| 2000 | China's Dust Affects Solar Resource in U.S.: A Case Study, Proceedings of the 2000 Annual Conference American Solar Energy Society, pp 383-389 (2000) (with Christian. A. Gueymard, Nels. S. Laulainen, and Joseph. K. Vaughan) |
| 1999 | Solar Cell Based Pyranometers: Evaluation of Diffuse Responsivity, Proceedings of the 1999 Annual Conference American Solar Energy Society, 260, June 1999. |
| 1998 | Determination of atmospheric turbidity from the diffuse-beam broadband irradiance ratio, Solar Energy 63, 135-146 (1998). (with Christian. A. Gueymard) |
| 1998 | Responsivity of an Eppley NIP as a Function of Time and Temperature, Proceedings of the 1998 Annual Conference American Solar Energy Society, 517-522, 14 Jun 1998 (with Ibrahim Reda) |
| 1997 | Atmospheric Turbidity Determination from Irradiance Ratios, Proceedings of the 1997 Annual Conference of the American Solar Energy Society, Washington, D.C., pp. 275-280, April, 1997. (with Christian. A. Gueymard.) |
| 1997 | Testing of the METSTAT Model, Proceedings of the 1997 Annual Conference of the American Solar Energy Society, Washington, D.C., pp. 287-292, April 1997. |
| 1993 | Value of Long-term Solar Radiation Data, Proceedings of the American Section of the International Solar Energy Society, Washington, D. C., April 1993. (with D. K. McDaniels.) |
| 1992 | Economics of Solar Energy Technologies, White Paper published by the American Solar Energy Society, December 1992. (Co-edited with R. Larson and R. West.) |
| 1991 | Direct Normal Beam Frequency Distribution, Proceeding of the Eleventh Biennial Congress of the International Solar Energy Society, Denver, Colorado, August 1991. (with D. K. McDaniels.) |
| 1989 | Direct Radiation: Ratio Between Horizontal and Tilted Surfaces, Solar Energy 43, 183, (1989). (with D. K. McDaniels.) |
| 1989 | Solar Cell Arrays: Degradation Due to Dirt, Proceedings of the American Section of the International Solar Energy Society, p. 234, Denver, Colorado, June 1989. (with C. P. Ryan and D. K. McDaniels.) |
| 1988 | Direct Beam Radiation: Projection on Tilted Surfaces, Solar Energy 40, 237 (1988). (with D. K. McDaniels.) |
| 1988 | Direct Radiation: Ratio Between Horizontal and Tilted Surfaces, Proceedings of the American Section of the International Solar Energy Society, p. 3, Boston, Massachusetts, June 1988. (with D. K. McDaniels.) |
| 1987 | Diffuse Radiation: Calculation from Hourly Global and Normal Beam Radiation, Proceedings of the American Section of the International Solar Energy Society, p. 394, Portland, Oregon, June 1987. (with D. K. McDaniels.) |
| 1986 | Beam-Global Correlations in the Pacific Northwest, Solar Energy 36, 409 (1986). (with D. K. McDaniels.) |
| 1985 | Effects of El Chichon on Global Correlations, Proceedings of the Ninth Biennial Congress of the International Solar Energy Society, Montreal, Canada, p. 2434, June 1985. (with D. K. McDaniels.) |
| 1984 | Transformation of Direct Solar Radiation to Tilted Surfaces, Proceedings of the American Section of the International Solar Energy Society, Anaheim, California, p. 651, June 1984. (with D. K. McDaniels.) |
| 1984 | Impact of Volcanic Material from El Chichon on Direct Radiation in the Pacific Northwest, Proceedings of the American Section of the International Solar Energy Society, Anaheim, California, p. 627, June 1984. (with D. K. McDaniels.) |
| 1984 | Diffuse-Global Correlations: Seasonal Variations, Solar Energy, 33, 397 (1984). (with D. K. McDaniels.) |
| 1984 | Correlations Between Diffuse and Global Insolation for the Pacific Northwest, Solar Energy, 32, 161 (1984). (with D. K. McDaniels.) |
| 1984 | Solar Resources and Direct Applications, Published in the Lake County Renewable Energy Plan, 1984. (with D. K. McDaniels.) |
| 1984 | Correlations between diffuse and global insolation for the Pacific Northwest, Solar Energy, ABSTRACT Correlations between diffuse and global insolation averaged over 1, 5, 10, 15, and 30 days are presented for six locations in Oregon and Idaho. Data collected over a 2-to 4-yr period was used to obtain the co... more abstract, Engineering and Solar Energy, 1984. (with D. K. McDaniels.) |
| 1983 | Solar Resources, published in the Harney County Renewable Energy Plan, pp. 173-239, January 1983. (with D. K. McDaniels.) |
| 1980 | Pacific Northwest Solar Radiation Data, published by the UO Solar Monitoring Laboratory, 1980-1998. (with D. K. McDaniels.) |
| 1978 | Solar Electricity, published in the Oregon Solar Planning Study, pp. 114-116 (1978). (with D. K. McDaniels and H. D. Kaehn.) |
| 1978 | Experimental Evaluation of the Reflector-Collector System, Proceedings of the American Section of the International Solar Energy Society, Vol. 1, 654 (1978). (with H.D. Kaehn, M. Geyer, D. Fong, and D. K. McDaniels.) |
| 1978 | Diffuse Radiation Contribution to the Useful Heat Output of a Reflector-Collector System, Proceedings of the American Section of the International Solar Energy Society, Vol. 1, 198 (1978). (with D. K. McDaniels, H.D. Kaehn, and M.S. Baker.) |
| 1975 | Predictions for Pion-Nucleon Bremsstrahlung, Cross Section |