Research on total solar irradiance calibration based on definition method tracing to the cryogenic radiometer

Zhiwei Liu; Junchao Zhang; Song Liu; Nan Xu

doi:10.1117/12.3036001

20 November 2024 Research on total solar irradiance calibration based on definition method tracing to the cryogenic radiometer

Zhiwei Liu, Junchao Zhang, Song Liu, Nan Xu

Author Affiliations +

Proceedings Volume 13241, Optical Metrology and Inspection for Industrial Applications XI; 132411N (2024) https://doi.org/10.1117/12.3036001
Event: SPIE/COS Photonics Asia, 2024, Nantong, Jiangsu, China

Conference Poster

Abstract

The earth's environment is strongly affected by changes in solar radiation. Accurate measurement of solar radiation is great importance to us. NIM has built a detector-based total solar irradiance calibration system. The transfer reference uses three 18mm×18mm silicon photodiodes assembled into a reflective trap detector whose power responsivity is traceable against the cryogenic radiometer. In order to avoid the saturation of the photodetector under high power, a beam splitting device is used to monitor the corrected power value. The reference trap detector and the total solar irradiance meter were placed in a vacuum chamber to calibrate the power responsivity using 532nm laser source. The aperture area of the total irradiance meter is measured by the aperture area measuring system based on the laser scanning method. The calibration uncertainty of the final total solar irradiance is 4.1×10^-4 (k=1).

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Zhiwei Liu, Junchao Zhang, Song Liu, and Nan Xu "Research on total solar irradiance calibration based on definition method tracing to the cryogenic radiometer", Proc. SPIE 13241, Optical Metrology and Inspection for Industrial Applications XI, 132411N (20 November 2024); https://doi.org/10.1117/12.3036001

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