User Manual

measured sensor spectral response, and radiation source spectral outputs (measured with a spectroradiometer).
This method calculates spectral error and does not consider calibration, cosine, and temperature errors.
Federer, C. A., and C. B. Tanner, 1966. Sensors for measuring light available for photosynthesis. Ecology 47:654-
657.
McCree, K. J., 1972. The action spectrum, absorptance and quantum yield of photosynthesis in crop plants.
Agricultural Meteorology 9:191-216.
Radiation weighting factors for
PPFD (defined plant response to
radiation), YPFD (measured plant
response to radiation), and
Apogee SQ Series quantum
sensors (sensor sensitivity to
different wavelengths of
radiation).