Optoelectronics Letters

, Volume 15, Issue 2, pp 147–150 | Cite as

International comparison of the SIAR measurement and the WRR standard

  • Xiao Tang (唐潇)
  • Yun-zhi Xia (夏云芝)
  • We Fang (方伟)Email author
  • Yu-peng Wang (王玉鹏)
  • Xin Ye (叶新)


We experimentally compare the solar irradiance absolute radiometer (SIAR) measurement with the world radiometric reference (WRR) standard to improve the accuracy of instrument. The SIAR joined in the international pyrheliometer comparison (IPC) in 2000. The comparison results show that the calibration factors for SIAR to WRR are 0.999 220, 1.001 694, 0.998 334 and 0.997 439 in the 9th IPC, the 10th IPC, the 11th IPC and the 12th IPC, respectively. These results are added to the measurement uncertainty budget of SIAR. The repeatability of the SIAR-type absolute radiometers is also investigated. The relative error introduced by two SIAR-type absolute radiometers is within 0.25%.

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Copyright information

© Tianjin University of Technology and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Xiao Tang (唐潇)
    • 1
  • Yun-zhi Xia (夏云芝)
    • 1
  • We Fang (方伟)
    • 2
    Email author
  • Yu-peng Wang (王玉鹏)
    • 2
  • Xin Ye (叶新)
    • 2
  1. 1.University of South ChinaHengyangChina
  2. 2.Changchun Institute of Optics, Fine Mechanics and PhysicsChinese Academy of SciencesChangchunChina

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