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An analysis is made of the application of the observation data provided by Lband radar system, in order to solve the existing problems and improve the accuracy of upperair meteorological observation. The main technical methods are discussed, including the data smoothing algorithm, outlier value judgment, eliminating and fitting compensation algorithm, sequence calculation method of the measured wind layer data per second, and so on. The results show that the value of wind second observation is to optimize and adjust the calculation steps (time interval) of the measured wind layer thickness, which can improve Lband system observation accuracy to reach the same level with the RS92 GPS sounding system and meet the basic requirements of the weather forecast service department. It is pointed out that the balloon sinking records can be properly kept by adjusting the operating procedures. Those comprehensive identification and interpolation methods for outliers can be used to improve the utilization rate of the second observation data provided by the Lband radar system, further enhance the level of intellectualization and automation of the operational service system. Such suggestions and improvements are expected to take effect on the revision of UpperAir Meteorological Service Specification.