Volume 12 Issue 4
Aug.  2019
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Article Contents
WANG Fei-xiang, GUO Jie, XU Fang-yu, ZHANG Yu-chen, CHEN Shuang-yuan, XIAO Jian-guo, JIA Yu-chao, Luo Hong, ZHAO Zhi-jun. Calculation and measurement of infrared atmospheric transmittance at different altitudes[J]. Chinese Optics, 2019, 12(4): 843-852. doi: 10.3788/CO.20191204.0843
Citation: WANG Fei-xiang, GUO Jie, XU Fang-yu, ZHANG Yu-chen, CHEN Shuang-yuan, XIAO Jian-guo, JIA Yu-chao, Luo Hong, ZHAO Zhi-jun. Calculation and measurement of infrared atmospheric transmittance at different altitudes[J]. Chinese Optics, 2019, 12(4): 843-852. doi: 10.3788/CO.20191204.0843

Calculation and measurement of infrared atmospheric transmittance at different altitudes

doi: 10.3788/CO.20191204.0843
Funds:

National Natural Science Foundation of China 11803089

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  • Corresponding author: GUO Jie, E-mail:ynnugj@sohu.com
  • Received Date: 22 Jan 2019
  • Rev Recd Date: 01 Mar 2019
  • Publish Date: 01 Aug 2019
  • In order to obtain atmospheric transmittance and study its variation with different altitudes, using methods of mathematical models, software simulations, and actual measurement, we calculate and measure the atmospheric transmittance in the range of 4.605~4.755 μm wavelengths at Ali(5 km), Delingha(3 km) and Huairou(0 km), three different altitudes below 25 km. Results indicate that the infrared atmospheric transmittance increases with altitude. With mathematical model the calculated atmospheric transmittances are 0.709, 0.572 and 0.555, respectively. With software simulations the calculated atmospheric transmittances are 0.849, 0.766 and 0.596, respectively. With actual measurement the obtained atmospheric transmittances are 0.805, 0.766 and 0.673. Due to higher altitude, lower relative humidity, high visibility, the atmospheric transmittance at Ali is the highest one. This conclusion has important reference significance for domestic astronomical infrared observation and spatial infrared target radiation characteristics measurement.

     

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