Yuan SU, Linlin WU, Fa TAO, Shuzhen HU, Xin CHENG. Joint inversion of cloud height by visible/infrared full sky imager and cloud radar[J]. Journal of Atmospheric and Environmental Optics, 2023, 18(2): 89
- Journal of Atmospheric and Environmental Optics
- Vol. 18, Issue 2, 89 (2023)
Fig. 1. Visible/infrared full sky imager. (a) Visible light imager; (b) infrared full sky imager
Fig. 2. YLU1 Ka-band millimeter-wave cloud radar
Fig. 3. Comparison of gray values with and without clouds at the same time
Fig. 4. Scatter diagram of cloud height and gray value before quality control in June, 2019
Fig. 5. Scatter diagram of low cloud height and gray value below 2500 m
Fig. 6. Scatter diagram and correlations of medium cloud height and gray value below 6000 m
Fig. 7. Scatter plots of medium and high cloud height and gray value above 6000 m
Fig. 8. Scatter diagram of cloud height and gray value after quality control in June, 2019
Fig. 9. Comparison of actual and inversion cloud heights in zenith direction
Fig. 10. The area within the zenith angle of about 30° near the zenith at 07:30 on June 4, 2019
Fig. 11. Three-dimensional distribution of gray value within 30°zenith angle of infrared cloud image at different cloud heights
Fig. 12. Relationship between downward infrared radiation and zenith angle cosine in clear sky
Fig. 13. Comparison between the cloud height obtained by linear inversion of the relationship between infrared radiation and zenith angle cosine and the cloud height obtained taking the zenith angle of about 30° near zenith
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Table 1. Performance indicators of millimeter-wave cloud radar
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Table 2. Main parameters obtained by each device of the system
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