Apogee SQ-202X-SS Manuale d'uso - Pagina 8

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Cosine Response

Directional (cosine) response is defined as the

measurement error at a specific angle of

radiation incidence. Error for Apogee SQ-100x

series quantum sensors is approximately ± 2 %

and ± 5 % at solar zenith angles of 45° and 75°,

respectively.

Mean cosine response of five SQ-

100X series quantum sensors.

Cosine response measurements

were made by direct side-by-side

comparison to the mean of seven

reference SQ-500 quantum

sensors.