Remote Sensing | |
SI Traceable Solar Spectral Irradiance Measurement Based on a Quantum Benchmark: A Prototype Design | |
Weiwei Pang1  Jianjun Li1  Xiaobing Zheng1  Maopeng Xia1  Youbo Hu1  Yinlin Yuan1  Wenchao Zhai1  | |
[1] Key Laboratory of Optical Calibration and Characterization, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, Anhui 230031, China; | |
关键词: radiometric benchmark; spontaneous parametric down-conversion; correlated photons; detector calibration; solar irradiance; | |
DOI : 10.3390/rs12091454 | |
来源: DOAJ |
【 摘 要 】
We propose a space benchmark sensor with onboard SI (Système International) traceability by means of quantum optical radiometry. Correlated photon pairs generated by spontaneous parametric down-conversion (SPDC) in nonlinear crystals are used to calibrate the absolute responsivity of a solar observing radiometer. The calibration is systematic, insensitive to degradation and independent of external radiometric standards. Solar spectral irradiance at 380–2500 nm is traceable to the photon rate and Planck’s constant with an expected uncertainty of about 0.35%. The principle of SPDC calibration and a prototype design of the solar radiometer are introduced. The uncertainty budget is analyzed in consideration of errors arising from calibration and observation modes.
【 授权许可】
Unknown