Weather Modification Office of Tianjin Tianjin 300074 ChinaKey Laboratory of Meteorology and Ecological Environment of Hebei Province Shijiazhuang 050021 China;
Key Laboratory of Meteorology and Ecological Environment of Hebei Province Shijiazhuang 050021 ChinaTianjin Meteorological Observation Center Tianjin 300074 China;
Key Laboratory of Meteorology and Ecological Environment of Hebei Province Shijiazhuang 050021 ChinaHebei Weather Modification Office Shijiazhuang 050011 China;
L-band sounding; Vertical structure of cloud; Relative humidity; Precipitation cloud;