Apogee Instruments SP-230 소유자 매뉴얼 - 페이지 8

{카테고리_이름} Apogee Instruments SP-230에 대한 소유자 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Apogee Instruments SP-230 18 페이지. Pyranometer
Apogee Instruments SP-230에 대해서도 마찬가지입니다: 소유자 매뉴얼 (20 페이지)

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Apogee Instruments SP-230 소유자 매뉴얼
Cosine Response:
Directional, or cosine, response is defined
as the measurement error at a specific
angle of radiation incidence. Error for
Apogee silicon-cell pyranometers is
approximately ± 2 % and ± 5 % at solar
zenith angles of 45° and 75°, respectively.
Mean cosine response of eleven Apogee
silicon-cell pyranometers (
represent two standard deviations
above and below mean
response measurements were made
during broadband outdoor radiometer
calibrations (BORCAL) performed during
two different years at the National
Renewable Energy Laboratory (NREL) in
Golden, Colorado. Cosine response was
calculated as the relative difference of
pyranometer sensitivity at each solar
zenith angle to sensitivity at 45° solar
zenith angle. The blue symbols are AM
measurements, the red symbols are PM
measurements.
8
error bars
). Cosine