Experimental characteristics and measurement accuracy evaluation of space cryogenic absolute radiometric primary benchmark

doi:10.37188/OPE.20212901.0010

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	Experimental characteristics and measurement accuracy evaluation of space cryogenic absolute radiometric primary benchmark
	X.-L. Yi; W. Fang; Y.-D. Lin; Y.-P. Wang; N. Xu; L. Sui; L.-B. Chen; Z.-W. Xia; K. Wang and X. Ye
	2021
发表期刊	Guangxue Jingmi Gongcheng/Optics and Precision Engineering
ISSN	1004924X
卷号	29 期号:1 页码:10-20
摘要	The establishment of a high-precision onboard radiometric benchmark is the primary technical means to improve on-orbit radiometric calibration accuracy. The space cryogenic absolute radiometric benchmark traced to the SI has been researched. First, a high-sensitivity cryogenic absolute radiation detector was developed. A high-thermal-resistance heat transfer structure was designed to connect the detector and cold finger to improve sensitivity. A highly stable thermal environment, better than 0.4 mK, was established by multistage precise temperature control. Then, a two-stage pulse tube cooler with a large cooling capacity was used to obtain a working environment of 20 K through a Stirling cycle in which the working fluid gas was compressed. Second, an absolute radiation measurement link was built to evaluate the measurement uncertainty. Finally, an indirect comparison was carried out using the reference cryogenic radiometer of the National Institute of Metrology of China. The experimental results illustrate that the sensitivity of the space cryogenic absolute radiometer experimental prototype was 3 565 K/W, the repeatability of 0.4 mW laser power measurement was 0.017%, and the relative standard uncertainty was 0.029%. The normalized deviation of the benchmark cryogenic radiometer was 0.4, and the validity of the uncertainty evaluation results was verified. The research lays a key technical foundation for the development of space cryogenic absolute radiometers. It is important to examine on-orbit radiometric calibration methods based on absolute detectors. 2021, Science Press. All right reserved.
DOI	10.37188/OPE.20212901.0010
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收录类别	EI
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文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/65232
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	X.-L. Yi,W. Fang,Y.-D. Lin,et al. Experimental characteristics and measurement accuracy evaluation of space cryogenic absolute radiometric primary benchmark[J]. Guangxue Jingmi Gongcheng/Optics and Precision Engineering,2021,29(1):10-20.
APA	X.-L. Yi.,W. Fang.,Y.-D. Lin.,Y.-P. Wang.,N. Xu.,...&K. Wang and X. Ye.(2021).Experimental characteristics and measurement accuracy evaluation of space cryogenic absolute radiometric primary benchmark.Guangxue Jingmi Gongcheng/Optics and Precision Engineering,29(1),10-20.
MLA	X.-L. Yi,et al."Experimental characteristics and measurement accuracy evaluation of space cryogenic absolute radiometric primary benchmark".Guangxue Jingmi Gongcheng/Optics and Precision Engineering 29.1(2021):10-20.

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