Pyranometer

Levinson, Ronnen M, Sharon S Chen, Paul H Berdahl, Pablo J Rosado, and Louis A Medina. "Reflectometer measurement of roofing aggregate albedo." Solar Energy 100 (2014) 159–171.

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Akbari, Hashem, Ronnen M Levinson, and Stephanie Stern. "Procedure for measuring the solar reflectance of flat or curved roofing assemblies." Solar Energy 82.7 (2008) 648–655.

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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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