| Summary: | The amount of information contained in the typical Automatic Dependent Surveillance-Broadcast (ADS-B) terrestrial station system is often small，and it does not support the real-time collection of the flight target track data packets, the dynamic display of track information at the data level, and the more granularity of the historical playback of raw data packets. For these practical application needs，this article aims to build a set of ADS-B data packet collection and analysis system, and try to optimize the processing applications of the acquired messages after processing the host by the ADS-B ground station，designing the data collection method of ADS-B Category(Cat) 021 packet, using UDP multicast to connect externally to Cat 021 packet parsing module. According to the standard Cat 021 data packet protocol format, a corresponding message parsing algorithm is designed and implemented to parse and store the collected data messages in real time.
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