23
Spectral Errors for Shortwave Radiation Measurements with Apogee SP Series Pyranometers
Radiation Source (Error Calculated Relative to Sun, Clear Sky)
Error [%]
Sun (Clear Sky)
0.0
Sun (Cloudy Sky)
9.6
Reflected from Grass Canopy
14.6
Reflected from Deciduous Canopy
16.0
Reflected from Conifer Canopy
19.2
Reflected from Agricultural Soil
-12.1
Reflected from Forest Soil
-4.1
Reflected from Desert Soil
3.0
Reflected from Water
6.6
Reflected from Ice
0.3
Reflected from Snow
13.7
