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On-Orbit Performance Degradation of the International Space Station P6 Photovoltaic ArraysThis paper discusses the on-orbit performance and performance degradation of the International Space Station P6 solar array wings (SAWs) from the period of December 2000 through February 2003. Data selection considerations and data reduction methods are reviewed along with the approach for calculating array performance degradation based on measured string shunt current levels. Measured degradation rates are compared with those predicted by the computational tool SPACE and prior degradation rates measured with the same SAW technology on the Mir space station. Initial results show that the measured SAW short-circuit current is degrading 0.2 to 0.5 percent per year. This degradation rate is below the predicted rate of 0.8 percent per year and is well within the 3 percent estimated uncertainty in measured SAW current levels. General contributors to SAW degradation are briefly discussed.
Document ID
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Kerslake, Thomas W.
(NASA Glenn Research Center Cleveland, OH, United States)
Gustafson, Eric D.
(NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
September 7, 2013
Publication Date
July 1, 2003
Subject Category
Energy Production And Conversion
Report/Patent Number
AIAA Paper 2003-5999
NAS 1.15:212513
Funding Number(s)
WBS: WBS 22-336-33-01-05
Distribution Limits
Work of the US Gov. Public Use Permitted.
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