Solar spectrophotometer

Levinson, Ronnen M, Hashem Akbari, and Paul H Berdahl. "Measuring solar reflectance—Part I: Defining a metric that accurately predicts solar heat gain." Solar Energy 84.9 (2010) 1717–1744.

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Levinson, Ronnen M, Hashem Akbari, and Paul H Berdahl. "Measuring solar reflectance—Part II: Review of practical methods." Solar Energy 84.9 (2010) 1745–1759.

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