关键词: 位置导航不确定性指标, ADS-B报文, 报文项统计, 所需监视性能(RSP), 可用性, 广域增强系统

Abstract: ADS-B technology is widely used in airspace surveillance. The surveillance quality of NUC_P based on its messages has attracted much attention. It has good NUC_P parameters but poor surveillance quality. To address this problem, the correlation between the ADS-B data items and the performance-based communication and monitoring are analyzed. On the basis of fully considering the correlation between the communication, navigation, and surveillance, as well as the wide area augmentation of GNSS satellite navigation, the performance estimation model of the ADS-B surveillance system is deduced and constructed. And then a reasonable simplification had been carried out. In the experimental test airspace, two ADS-B receivers with operational qualification from different manufacturers are installed and operated. Almost 200 million ADS-B messages are collected in three months. The statistical distribution of each information item in the message is analyzed and calculated in detail. These results are applied to the estimation model to evaluate and calculate the required surveillance performance of the two ADS-B stations. And the parameters of message items in the references are applied in the model to evaluate the required performance. The results show that when considering the statistical distribution of each message item and the supporting of wide area augmentation, the surveillance performance of ADS-B systems do not meet the requirement of 99.9%. In the absence of wide area augmentation and the related factors, the required performance of the system is further from the ADS-B surveillance performance specifications required by ICAO.

Key words: NUC_P, ADS-B message, items statistics, Required Surveillance Performance (RSP), availability, Wide Area Augmentation System (WAAS)