Fig. 1. Weighting functions of water vapor channel and infrared channel of GOES satellite, quoted from http：//cimss.ssec.wisc.edu

Fig. 2. U-net architecture used by generator of pix2pix. Dimensions of data are shown as (channels, width, height)

Fig. 3. Test error for experiments using 1 h satellite image intervals, pix2pix architecture, high resolution data, and without visible channels. (a) 40000 iterations; (b) 500000 iterations

Fig. 4. Comparison of wind speed retrieved by neural network and wind speed of NCEP/NCAR reanalysis. (a) 850 hPa; (b) 200 hPa

Fig. 5. Spatial distribution of MVD of wind retrieved by neural network. (a) 850 hPa; (b) 200 hPa

Fig. 6. Comparison of wind field retrieved by neural network and wind field of NCEP/NCAR reanalysis. (a) 850 hPa wind direction (streamline) and speed (shaded) retrieved by neural network at October 9, 2019 12:00 UTC; (b) same as (a), but with NCEP/NCAR reanalysis data; (c) 200 hPa wind direction (streamline) and speed (shaded) retrieved by neural network at October 9, 2019 12:00 UTC; (d) same as (c), but with NCEP/NCAR reanalysis data; (e)-(h) same as (a)-(d), but at January 26, 2018 18:00 UTC