Apogee Instruments SQ-618-SS Manuale d'uso - Pagina 9

Sfoglia online o scarica il pdf Manuale d'uso per Accessories Apogee Instruments SQ-618-SS. Apogee Instruments SQ-618-SS 18. Epar sensor

Cosine Response

Directional, or cosine, response is defined as the

measurement error at a specific angle of radiation

incidence. Error for Apogee SQ-600 series ePAR Sensor is

approximately ± 2 % and ± 5 % at solar zenith angles of 45°

and 75°, respectively.

Mean directional (cosine) response

of seven Apogee series quantum

sensors. Directional response

measurements were made on the

rooftop of the Apogee building in

Logan, Utah. Directional response

was calculated as the relative

difference of quantum sensors from

the mean of replicate reference

quantum sensors (LI-COR models LI-

190 and LI-190R, Kipp & Zonen

model PQS 1). Data were also

collected in the laboratory using a

reference lamp and positioning the

sensor at varying angles.