Apogee Instruments S2-431 Руководство пользователя - Страница 8
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Cosine Response
Spectral Response
Directional, or cosine, response is
defined as the measurement error at a
specific angle of radiation incidence.
Directional error for Apogee S2 series red
- far-red sensors is approximately ± 2 %
and ± 5 % at solar zenith angles of 45°
and 75°, respectively.
Mean spectral response
measurements of six replicate red -
far-red sensors (red sensor is centered
near 655 nm, far-red sensor is
centered near 730 nm). Spectral
response measurements were made
at 2 nm increments across a
wavelength range of 600 to 800 nm in
a monochromator with an attached
electric light source. Measured
spectral data from each sensor were
normalized by the measured spectral
response of the
monochromator/electric light
combination, which was measured
with a spectroradiometer.