摘要
陆基增强系统(GBAS)是国际民航组织推荐的新一代精密进近着陆系统,其完好性是影响该系统导航性能的关键参数之一。为此,介绍全球定位系统/北斗导航系统(GPS/BDS)的时间和坐标系统,分析它们之间的转换和统一方式,并给出GPS/BDS组合定位模型。根据国际相关标准,研究基于GPS星座和BDS区域星座的GBAS伪距误差模型和保护级算法,并进行相应仿真。仿真结果表明,基于GPS/BDS双星座的GBAS完好性保护级要明显优于GPS或BDS单星座时的保护级,并且能够满足II/III类精密进近对完好性的要求。
Ground-based Augmentation System（GBAS）is the new generation of precision approach and landing system recommended by International Civil Aviation Organization（ICAO）,and its integrity is one of the key parameters affecting the Required Navigation Performance（RNP）of this system.The time and coordinate systems of Global Positioning System/Beidou System（GPS/BDS）are introduced,the transformation and unification between the time and coordinate systems of GPS/BDS are analyzed,and integrated positioning model of GPS/BDS is presented.The pseudorange error model and protection level algorithm of GBAS are analyzed and researched based on GPS constellation and BDS regional constellation according to relative international standards,and relative simulations are put up.Simulation results show that integrity protection levels of GBAS based on GPS/BDS constellations are obviously better than that based on GPS or on BDS,and the integrity based on GPS/BDS can satisfy the requirements of integrity for Category II/III precision approach.
出处
《计算机工程》
CAS
CSCD
北大核心
2015年第12期30-35,共6页
Computer Engineering
基金
国家空管委基金资助项目(GKG201410004)
关键词
陆基增强系统
完好性
北斗导航系统
全球定位系统
保护级
Ground-based Augmentation System（GBAS）
integrity
BeiDou navigation System（BDS）
Global Positioning System（GPS）
protection level
