基于BDSBAS的机载端完好性算法研究

Research on Airborne End Integrity Algorithm Based on BDSBAS

用户差分距离误差、区域用户距离误差是判断差分精度能否符合系统完好性性能标准的主要参数,本文基于北斗星级增强系统在校验电离层延迟时,使用格网电离层校正模型的二次曲面拟合算法得到电离层延迟,计算用户差分距离误差、区域用户距离误差。结果表明,二次曲面拟合算法能满足机载端在飞行各阶段中对北斗卫星导航系统精度与完好性的要求。

User differential distance error and regional user distance error are the main parameters for judging whether the differential accuracy can meet the system integrity performance standards. This paper is based on the BD Navigation Satellite-Based Augmentation System to check the ionospheric delay using the grid quadric surface correction model The fitting algorithm obtains the ionospheric delay, and calculates the user differential distance error and the regional user distance error. The results show that the quadric surface fitting algorithm can meet the accuracy and integrity requirements of the BD Navigation Satellite-Based Augmentation System during the flight phase of the airborne terminal.