Quality control and data evaluation of different models of ground-based microwave radiometers in Zhejiang area
The article used observation data from seven ground-based microwave radiometers in Zhejiang Province in 2021 to conduct quality assessments using methods including logical discrimination,rate of change discrimination,precipitation discrimination,consistency discrimination,and climate threshold discrimination.The quality control results of each ground-based microwave radiometer were detailed,and the accuracy of brightness temperature data was evaluated.The results showed that the accuracy of the quality control methods for 7 devices was basically above 90％,and the proportion of all quality control methods passing logical checks was 82.10％to 91.12％.The correlation coefficient between the measured brightness temperature and the simulated brightness temperature of all tested equipment exceeded 0.85,reaching a significance level of 0.001.The oxygen channel was higher than the water vapor channel,and the non precipitation condition was higher than the precipitation condition.Under non precipitation conditions,the average deviation of oxygen channels for each ground-based microwave radiometer ranges from-0.59 K to 1.99 K,with a root mean square error of 1.35 K to 2.65 K,with the MWR-G microwave radiometer having the smallest error.The error of the water vapor channel is slightly higher than that of the oxygen channel.Under precipitation conditions,there is a significant deviation in the brightness temperature data of ground-based microwave radiometers.Therefore,caution should be exercised when using the observation data of ground-based microwave radiometers during precipitation.
ground based microwave radiometerbright temperaturequality control
万方数据
维普
