ASTM International - ASTM E1918-97
Standard Test Method for Measuring Solar Reflectance of Horizontal and Low-Sloped Surfaces in the Field (Withdrawn 2006)
|Publication Date:||10 December 1997|
|ICS Code (Colours and measurement of light):||17.180.20|
1.1 This test method covers the measurement of solar reflectance of various horizontal and low-sloped surfaces and materials in the field, using a pyranometer. The test method is intended for use when the sun angle to the normal from a surface is less than 45 degrees.