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 Ze,Ka，（b）W-band radar Ze,W，（c）Dze

Fig. 4. The altostratus cloud March 3, 2020（a）Scatter histograms of reflectivity of Ka-band and W-band,（b）Dze histogram distribution

Fig. 5. The altostratus cloud on March 3，2020（a）Ka-band Radar VKa，（b）W-band Radar VW，（c）the VDiff

Fig. 6. March 3, 2020（a）Scatter histograms of V of Ka-band and W-band,（b）VDiffhistogram distribution

Fig. 7. The case on August 23-24，2019（a）Ka-band radar Ze,Ka，（b）W-band radar Ze,W，（c）Dze

Fig. 8. The case on August 23-24, 2019（a）Dze histogram distribution,（b）The histogram distribution of Ze,W while the echo signal is not detected by Ka-band radar

Fig. 9. The precipitation cloud on August 7，2019（a）Ka-band radar Ze,Ka，（b）W-band radar Ze,W，（c）Dze

Fig. 10. The precipitation cloud on August 7, 2019（a）Altitude distribution of Dze，（b）Dze histogram distribution

Fig. 11. The precipitation cloud on August 7，2019（a）Ka-band Radar V，（b）W-band Radar V，（c）The VDiff

Fig. 12. VDiffhistogram distribution（a）above melting-layer，（b）below melting-layer

Fig. 13. The snowfall cloud on March 14，2020（a）Ka-band radar Ze,Ka，（b）W-band radar Ze,W，（c）Dze

Fig. 14. The snowfall cloud on March 14, 2020（a）Dze 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 VKa，（b）W-band Radar VW，and（c）The VDiff

Fig. 16. The snowfall cloud on March 14, 2020（a）scatter plot of V of Ka-band and W-band, and（b）VDiffhistogram distribution