• High Power Laser and Particle Beams
  • Vol. 36, Issue 12, 129001 (2024)
Shu Wang1, Wentao Lian2,3,4,5,*, Zhen Sun2,3,4, and Tao Hu1
Author Affiliations
  • 1Information Engineering University, Zhengzhou 450001, China
  • 2Key Laboratory of Atmospheric Optics, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
  • 3University of Science and Technology of China, Hefei 230031, China
  • 4Advanced Laser Technology Laboratory of Anhui Province, Hefei 230037, China
  • 5School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei 230026, China
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    DOI: 10.11884/HPLPB202436.240333 Cite this Article
    Shu Wang, Wentao Lian, Zhen Sun, Tao Hu. Research on radiometric calibration method and measurement of whole layer atmospheric transmittance in short wave infrared band[J]. High Power Laser and Particle Beams, 2024, 36(12): 129001 Copy Citation Text show less

    Abstract

    This article employs Fourier transform infrared spectroscopy to investigate radiometric calibration methods and the measurement of continuous atmospheric transmittance across the shortwave infrared band. The presence of multiple strong absorption bands within the shortwave infrared spectrum (0.9-2.2 μm) leads to significant errors in the commonly used Langley method, and even the improved Langley method struggles to yield accurate results for the calibration of these strong absorption bands. To fulfill the high-precision measurement demands for atmospheric transmittance across the entire shortwave infrared band, this paper introduces an enhanced method for calculating atmospheric transmittance. Initially, the Langley calibration technique is utilized to determine the instrument calibration value and response function K in the non-absorption band. Subsequently, the instrument response function in the absorption band is derived by interpolating the wavelength based on the instrument response function calibrated in the non-absorption band. Ultimately, the instrument calibration value is established by correlating it with the solar irradiance at the atmosphere’s top, thereby obtaining the atmospheric transmittance across the entire shortwave infrared band. Compared to results calculated by the medium-resolution atmospheric radiative transfer model software CART, the atmospheric transmittance values obtained using this method within the 0.9-2.2 μm band exhibit an average error of less than 2.5%.
    Shu Wang, Wentao Lian, Zhen Sun, Tao Hu. Research on radiometric calibration method and measurement of whole layer atmospheric transmittance in short wave infrared band[J]. High Power Laser and Particle Beams, 2024, 36(12): 129001
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