摘要
GBAS推动了空中交通管理系统由路基导航向星基导航过渡,其中多参考一致性检测(MRCC)的B值是GBAS地面完好性检测的核心算法.本文提出基于导航星监测的B值修正算法,通过定义卫星伪距修正量误差估计值S值对导航星监测,利用高斯膨胀-Shewhat法推导S示警阈值,结合S值检测并标记故障卫星,形成新的可用卫星集合,避免由于B值无法有效反映具有较大偏差的卫星伪距修正量的误差估计而造成MRCC执行逻辑对接收机的整体剔除,对B值形成修正作用.实验证明,新算法可有效监测卫星故障,修正B值,提高M RCC监测能力并提高系统可用性.
Ground based augmentation system（GBAS） promotes the transition of air traffic management system from roadbed navigation to satellite-based navigation,in which B for multireference consistency check（MRCC） is the core algorithm in GBAS.The B correction algorithm is proposed based on the navigation satellites monitoring.The satellite pseudorange correction error S estimated is defined to monitor navigation satellites.With the methods of Gauss expansionShewhat,S warning threshold is derived.According to S value detected and fault satellites,a newcollection of available satellites is formed,thus it is avoided that the whole receiver may be eliminated by the execution logic of MRCC because the B value cannot effectively reflect a large deviation of satellite pseudorange correction error estimated,which means the B values can be corrected.Experimental results showthat the satellite fault can be monitored effectively in the newalgorithm,and B value can be corrected,so as to improve the monitoring capacity of MRCC and increase system availability.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2016年第8期1075-1078,共4页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(U1433115
61151002
61401079
61501038)
中国航天科技集团公司卫星应用研究院创新基金资助项目(2014-CXJJ-TX-11)
中央高校基本科研业务费专项资金资助项目(N120404003)
