Are solar reflectance, TSR, and albedo the same?

In the context of material solar reflectance index (SRI), solar reflectance, TSR (total solar reflectance) and albedo are the same.

Particularly, solar reflectance is the standard term used in all relevant ASTM standards. TSR and albedo are not used in the ASTM standards, but they are often used by the industry or some literature.

In our test report, we only report the solar reflectance. In case the TSR or albedo values are needed, the solar reflectance results can be directly used, without conversion.

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