Apogee Instruments SE-100 Manual del usuario - Página 9

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Cosine Response

Directional, or cosine, response is defined

as the measurement error at a specific

angle of radiation incidence. Error for

Apogee SE series photometric sensors is

approximately ± 2 % and ± 5 % at solar

zenith angles of 45° and 75°, respectively.

Cosine response

measurements were

made by direct side-by-

side comparison to the

mean of four reference

SE-100 photometric

sensors.