北斗三号卫星四频实时周跳探测与修复方法

Real-Time Cycle Slip Detection and Repair Method for BDS-3 Four-Frequency Data

针对北斗三号卫星可播发四频信号的特点,提出一种联合3个无几何相位组合和1个伪距相位组合的实时周跳探测与修复方法。首先探讨多频条件下的高质量组合,然后挑选3个无几何相位组合和1个伪距相位组合共同进行周跳探测,并利用LAMBDA方法实时修复周跳,最后采用不同观测条件下的实测数据对该方法的有效性进行验证。结果表明,该方法相比于三频条件受电离层延迟影响更小,可实时探测与修复四频观测数据中的周跳。

Aiming at the characteristic that Beidou-3 satellites can broadcast four-frequency signals,we propose a real-time cycle slip detection and repair method.The method combines three geometry-free phase combinations and one code-phase combination.Firstly,the high-quality geometry-free combination under multi-frequency conditions is discussed,and then three geometry-free phase combinations and one code-phase combination are selected to detect the cycle slips,combined with the LAMBDA method to repair the cycle slips in real time.Finally,we use the measured data under the different observation conditions to verify the effectiveness of the proposed method.The results show that the method is less affected by ionospheric delay than three-frequency condition,and can detect and repair the cycle slips in real time.