Fig. 1. The appearance and block diagram of dual-frequency millimeter cloud radar
Fig. 2. Histogram of reflectivity and curve of sensitivity(a)Ka-band radar,(b)W-band radar("Number" indicates the number of measurements under the conditions of the corresponding height and reflectivity factor)
Fig. 3. The altostratus cloud on March 3,2020(a)Ka-band radar ,(b)W-band radar ,(c)
Fig. 4. The altostratus cloud March 3, 2020(a)Scatter histograms of reflectivity of Ka-band and W-band,(b) histogram distribution
Fig. 5. The altostratus cloud on March 3,2020(a)Ka-band Radar ,(b)W-band Radar ,(c)the
Fig. 6. March 3, 2020(a)Scatter histograms of V of Ka-band and W-band,(b)histogram distribution
Fig. 7. The case on August 23-24,2019(a)Ka-band radar ,(b)W-band radar ,(c)
Fig. 8. The case on August 23-24, 2019(a) histogram distribution,(b)The histogram distribution of while the echo signal is not detected by Ka-band radar
Fig. 9. The precipitation cloud on August 7,2019(a)Ka-band radar ,(b)W-band radar ,(c)
Fig. 10. The precipitation cloud on August 7, 2019(a)Altitude distribution of ,(b) histogram distribution
Fig. 11. The precipitation cloud on August 7,2019(a)Ka-band Radar V,(b)W-band Radar V,(c)The
Fig. 12. histogram distribution(a)above melting-layer,(b)below melting-layer
Fig. 13. The snowfall cloud on March 14,2020(a)Ka-band radar ,(b)W-band radar ,(c)
Fig. 14. The snowfall cloud on March 14, 2020(a) histogram distribution, and(b)Z histogram distribution of W-band radar while the Ka-band radar no echo
Fig. 15. The snowfall cloud on March 14,2020(a)Ka-band Radar ,(b)W-band Radar ,and(c)The
Fig. 16. The snowfall cloud on March 14, 2020(a)scatter plot of V of Ka-band and W-band, and(b)histogram distribution
参数符号 | 说 明 | 单 位 | W波段 | Ka波段 |
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λ | 雷达工作波长 | cm | 0.32 | 0.86 | Pt | 发射机峰值功率 | kW | 1.5 | 3 | τ | 发射脉冲宽度 | us | 0.5 | 0.5 | Φ | 水平波束宽度 | (°) | 0.16 | 0.39 | θ | 垂直波束宽度 | (°) | 0.16 | 0.42 | G | 天线增益 | dB | 59.11 | 52.89 | L∑ | 馈线总损耗(双程) | dB | 3.8 | 3 | B | 接收带宽 | M | 2 | 2 | Fn | 噪声系数 | dB | 6.8 | 4.7 | C0 | 雷达常数 | dB | 64.7 | 66.42 | Prmin | 接收灵敏度 | dBm | -104.19 | -106.29 |
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Table 1. Dual-wavelength millimeter-wave cloud radar specifications