Apogee SQ Series Owner's Manual - Page 8

Browse online or download pdf Owner's Manual for Accessories Apogee SQ Series. Apogee SQ Series 19 pages. Quantum sensor

Print Page

Cosine Response

Directional, or 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.