Edward Gaddy Print




:   Spacecraft Solar Array Engineer

:  Earth


Degree Field of Study Year Attained Institution Name
Doctor of Philosophy Physics 1978 American University
Master of Science Physics 1970 American University
Bachelor of Science Physics 1966 University of Richmond

Dr. Edward M. Gaddy's current research interests focus on extremely light weight solar arrays for use at the outer planets. In this capacity, he led the design team for the Transformational Solar Array that achieved a specific power density that is over five times better than state-of-the-art arrays at Jupiter environs. Recently, Dr. Gaddy also designed the photovoltaics that power the Parker Solar Probe. The challenge with the Parker array is that it operates at higher irradiances than any other spacecraft solar array. This is because the Parker Solar Probe gets closer to the sun than any other spacecraft. Other challenges with the Parker array included accounting for array output with only the limb of the sun visible.

Dr. Gaddy has worked for over 50 years as an array engineer, and in that time made significant contributions to over one hundred spacecraft solar arrays. He has three patents related to spacecraft solar arrays. He initiated and co-chaired the committee that rewrote AIAA Standards for Qualification and Quality Requirements for Solar Cells and for Solar Panels.

AGU Index Category AGU Index Sub-Category
GENERAL OR MISCELLANEOUS Techniques applicable in three or more fields
Start Year End Year Description
2009 2020 Senior Principal Staff at Johns Hopkins University Applied Physics Laboratory Parker Solar Probe Solar Array Engineer and the Europa Clipper Solar Array Engineer
1997 2009 Staff Engineer for the Power Systems Branch at Goddard Space Flight Center, Greenbelt, Maryland. I planned and conducted development to produce advanced solar arrays and power systems for space flight use. I insured that GSFC maintained and improved its power systems technology base for present and next generation flight programs. I contributed to many design reviews of spacecraft.
1991 1997 Head of the Energy Conversion and Analysis Section at Goddard Space Flight Center. I supervised three power system engineers, two solar array engineers and two technicians. I chaired a committee to determine the action to correct flaws in the first Hubble Space Telescope solar array.
1983 1991 Manager then Director of Aerospace Products at Solarex Aerospace in Rockville, MD. I increased sales of the division from approximately $200,000 to over $2,000,000 per year by targeting specific customers for increased marketing and by improving the division’s technical, quality, and business performance.
Year Description
2010 The Irving Weinburg Award for Significant Contributions to the field of Space Photovoltaics
2010 Power System Engineer of the Year Award for Contributions to the Field of Spacecraft Power Systems
2008 Tom Budney Engineering Integrity Award
2005 Creative Development of Technically Significant Software
The following publication information was downloaded from

ORCID logo https://orcid.org/0000-0003-1810-2155

Richard Stall, Matthew Schurman, Christopher M. Sulyma, Andrew Gerger, Edward Gaddy, (2018), UV Degradation of Space Solar Cell Assemblies under High Temperature and Irradiance, 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC), https://doi.org/10.1109/pvsc.2018.8547643

Anton Yanchilin, Edward Gaddy, (2017), Solar Probe Plus Array Reliability, 2017 IEEE 44th Photovoltaic Specialist Conference (PVSC), https://doi.org/10.1109/pvsc.2017.8366304

, (2014), Predicting the Solar Probe Plus Solar Array Output, 40th Photovoltaic Specialists Conference

Edward Gaddy, Hsiao Smith, (1996), Relative cost effectiveness of multi-junction, gallium arsenide, and silicon solar cells, 34th Aerospace Sciences Meeting and Exhibit, https://doi.org/10.2514/6.1996-123

Elisabeth McClure, Edward Gaddy, (2010), Analysis of record photovoltaic efficiencies from 1954 to 2009, 2010 35th IEEE Photovoltaic Specialists Conference, https://doi.org/10.1109/pvsc.2010.5614625

Edward Gaddy, Rob Decker, Mary Kae Lockwood, Lew Roufberg, Gayle Knutzen, Danielle Marsh, (2010), The Solar Probe Plus solar array development and design, 2010 35th IEEE Photovoltaic Specialists Conference, https://doi.org/10.1109/pvsc.2010.5617077

E.M. Gaddy, (1996), Cost performance of multi-junction, gallium arsenide, and silicon solar cells on spacecraft, Conference Record of the Twenty Fifth IEEE Photovoltaic Specialists Conference - 1996, https://doi.org/10.1109/pvsc.1996.564003

E.M. Gaddy, (1988), Extended life interconnect for large solar cell space arrays, Conference Record of the Twentieth IEEE Photovoltaic Specialists Conference, https://doi.org/10.1109/pvsc.1988.105848

Edward M. Gaddy, Howard R. Reiss, (1976), Evaluation of the "mean frequency" technique, Physical Review A, 13, 5, 1801--1804, https://doi.org/10.1103/physreva.13.1801

T.G. Stern, D. Krumweide, E. Gaddy, I. Katz, Development of an electrostatically clean solar array panel, Conference Record of the Twenty-Eighth IEEE Photovoltaic Specialists Conference - 2000 (Cat. No.00CH37036), https://doi.org/10.1109/pvsc.2000.916141

R.L. Mueller, E. Gaddy, The performance of advanced III-V solar cells, Conference Record of the Twenty-Ninth IEEE Photovoltaic Specialists Conference, 2002., https://doi.org/10.1109/pvsc.2002.1190726

E.M. Gaddy, Performance of dark I-V tests to determine the condition of spacecraft solar arrays, Conference Record of the Twenty Sixth IEEE Photovoltaic Specialists Conference - 1997, https://doi.org/10.1109/pvsc.1997.654245

M.J. Herriage, R.M. Kurland, C.D. Faust, E.M. Gaddy, D.J. Keys, EOS AM-1 GaAs/Ge flexible blanket solar array verification test program results, IECEC-97 Proceedings of the Thirty-Second Intersociety Energy Conversion Engineering Conference (Cat. No.97CH6203), https://doi.org/10.1109/iecec.1997.659250

M.J. Herriage, R.M. Kurland, C.D. Faust, E.M. Gaddy, D.J. Keys, EOS AM-1 GaAs/Ge flexible blanket solar array, IECEC 96. Proceedings of the 31st Intersociety Energy Conversion Engineering Conference, https://doi.org/10.1109/iecec.1996.552845

E.M. Gaddy, Results from the Goddard Space Flight Center's Long Duration Exposure Facility solar array component test, Proceedings of 1994 IEEE 1st World Conference on Photovoltaic Energy Conversion - WCPEC (A Joint Conference of PVSC, PVSEC and PSEC), https://doi.org/10.1109/wcpec.1994.520756

S. Bailey, H. Curtis, M. Piszczor, R. Surampudi, T. Hamilton, D. Rapp, P. Stella, N. Mardesich, J. Mondt, R. Bunker, B. Nesmith, E. Gaddy, D. Marvin, L. Kazmerski, Photovoltaic cell and array technology development for future unique NASA missions, Conference Record of the Twenty-Ninth IEEE Photovoltaic Specialists Conference, 2002., https://doi.org/10.1109/pvsc.2002.1190694

R. Kurland, H. Schurig, M. Rosenfeld, M. Herriage, E. Gaddy, D. Keys, C. Faust, W. Andiario, M. Kurtz, E. Moyer, Terra flexible blanket solar array deployment, on-orbit performance and future applications, Conference Record of the Twenty-Eighth IEEE Photovoltaic Specialists Conference - 2000 (Cat. No.00CH37036), https://doi.org/10.1109/pvsc.2000.916070