Abstract:

In order to explore the accuracy and availability of the detection data of microwave radiometer and wind profiler radar, the error characteristics of temperature and humidity detected by microwave radiometer and wind profiler radar under different weather conditions were analyzed using the GPS sounding data obtained during the National Sports Games in Tianjin.The results show that under sunny, cloudy, and rainy days, the microwave radiometer retrieves the low-altitude temperature profile well, while the inversion error of the upper-air temperature profile is large.Under cloudy days, the correlation between the inverted whole-layer temperature profile and the measured values from radiosonde is optimal.Under three kinds of weather conditions, the error of relative humidity profile inverted by the microwave radiometer is large, and the correlation with sounding data is poor.Under sunny and cloudy conditions, the error of wind direction and speed detection by wind profile radar is small, and the wind detection effect of wind profile radar on rainy days is poor.Under sunny and cloudy conditions above 1750 m, and rainy days above 3000 m, the wind speed data detected by the wind profile radar have good correlations with sounding data, while those detected at low altitude have poor correlations with sounding data.Below 3500 m, the correlation between the wind direction detected by the wind profile radar and sounding data is poor under three weather conditions, while above 3500 m, the correlation is good, and the value fluctuates between 0.6-1.0.

Key words: Weather conditions, Microwave radiometer, Wind profiler radar, Error characteristics