Apogee Instruments S2-111 Manual del usuario - Página 7
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Cosine Response
Upward- and Downward-looking Two-band Sensors
Directional, or cosine, response is defined as
the measurement error at a specific angle of
radiation incidence. Error for Apogee S2
series upward-looking sensors is
approximately ± 2 % and ± 5 % at solar zenith
angles of 45° and 75°, respectively.
Upward (model S2-111)
Downward (model S2-112)