Apogee Instruments SQ-622-SS Manuale d'uso - Pagina 7
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Spectral Response
Cosine Response
Mean spectral response measurements of
six replicate Apogee SQ-600 series Extended
Range PFD Sensors. Spectral response
measurements were made at 10 nm
increments across a wavelength range of
300 to 1100 nm in a monochromator with
an attached electric light source. Measured
spectral data from each PFD sensor were
normalized by the measured spectral
response of the monochromator/electric
light combination, which was measured with
a spectroradiometer
Directional, or cosine, response is defined as the
measurement error at a specific angle of radiation
incidence. Error for Apogee SQ-600 series Extended Range
PFD Sensor is approximately ± 2 % and ± 5 % at solar zenith
angles of 45° and 75°, respectively.