Abstract：The article utilizes data from Kunming sounding station from November 2023 to January 2024,as well as temperature and relative humidity data retrieved from the Airda-HTG4 ground-based multi-channel microwave radiometer at the same location.On the basis of quality control methods,the accuracy of temperature and humidity data for effective samples in the vertical direction at 08:00 and 20:00 was evaluated by adding spatial and temporal matching methods.The results showed that the overall temperature observation performance of the device was excellent,with an average system deviation of 0.67 ℃ for the entire layer,a root mean square error (RMS) of ≤3 ℃,and a correlation coefficient of 0.98.The average deviation of relative humidity is 0.11％,RMS≤20％. The correlation coefficient is 0.86,and the temperature detection accuracy is significantly better than that of humidity.Monthly observations show that the temperature RMS remains stable at 2.30～2.50 ℃,and the humidity RMS is 14％～17％,confirming the reliability of the equipment data.After quality control,the temperature error in the 5 000-10 000 m altitude layer (temperature<0 ℃) was significantly reduced,and the consistency with sounding data was enhanced.The original humidity data of this altitude layer has a significant negative deviation,and after quality control,the RMS has decreased to within 20％.Research has confirmed that the Airda-HTG4 device has outstanding temperature detection performance.
2025, Vol. 42 
