Apogee Instruments PYRANOMETER SP-421 Gebruikershandleiding - Pagina 16
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Spectral Errors for Shortwave Radiation Measurements with Apogee SP Series Pyranometers
Radiation Source (Error Calculated Relative to Sun, Clear Sky)
Sun (Clear Sky)
Sun (Cloudy Sky)
Reflected from Grass Canopy
Reflected from Deciduous Canopy
Reflected from Conifer Canopy
Reflected from Agricultural Soil
Reflected from Forest Soil
Reflected from Desert Soil
Reflected from Water
Reflected from Ice
Reflected from Snow
Spectral error for Apogee SP series
pyranometers as a function of solar zenith
angle, assuming calibration at a zenith angle
of 45°.
Spectral error for Apogee SP series
pyranometers as a function of atmospheric air
mass, assuming calibration at an air mass of
1.5.
Error [%]
0.0
9.6
14.6
16.0
19.2
-12.1
-4.1
3.0
6.6
0.3
13.7
16