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- 2018
惯导辅助的无电离层与宽巷组合周跳探测与修复方法
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Abstract:
由于卫星信号被遮挡、低信噪比或接收机运动等原因，载波相位观测值较正常值会发生周跳。为解决这一问题，基于精密单点定位与惯导组合系统，提出了一种有效的惯导辅助周跳探测与修复方法。该方法基于无电离层（ionospheric free，IF）组合与宽巷（wide lane，WL）组合，利用惯导短时高精度信息代替伪距消除站星几何距离，结合历元间差、星间差等建立惯导辅助的IF组合模型和惯导辅助的WL组合模型。惯导辅助的IF组合模型不受电离层延迟影响，但无法探测特殊比例周跳，惯导辅助的WL组合模型波长较长，却无法探测双频等周周跳，两者的综合使用实现了优势互补。实验结果表明，该方法不仅能有效探测出各种大、小、双频等周和特殊比例周跳，而且在一定卫星信号中断时间内能实现周跳瞬时校正
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