Apogee S2-442 Manual del usuario - Página 14
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Spectral Errors for Far-red Photon Flux Density Measurements with Apogee S2-141 PAR-FAR Sensors
Radiation Source (Error Calculated Relative to Sun, Clear Sky)
Sun (Clear Sky)
Sun (Cloudy Sky)
Reflected from Grass Canopy
Transmitted below Wheat Canopy
Cool White Fluorescent (T5)
Metal Halide
Ceramic Metal Halide
High Pressure Sodium
Cool White LED
Warm White LED
Far-red LED with 678 nm peak and 782 nm cutoff
Far-red LED with 735 nm peak and 688-759 nm range
Far-red LED with 739 nm peak and 700-761 nm range
Far-red LED with 732 nm peak and 698-750 nm range
Far-red LED with 722 nm peak and 674-747 nm range
Federer, C.A., and C.B. Tanner, 1966. Sensors for measuring light available for photosynthesis. Ecology 47:654-657.
Ross, J., and M. Sulev, 2000. Sources of errors in measurements of PAR. Agricultural and Forest Meteorology
100:103-125.
S2-141 Sensor
Far-red Error [%]
-1.9
-3.6
-1.4
0.1
-6.5
4.3
2.1
2.7
-0.5
-0.7
-1.1
0.0
-0.2
2.5
-0.8