摘要
提出一种检测全球定位系统(GPS)载波相位信号中周跳的新方法,该方法是在同步观测序列中选出R个连续历元的观测作为正常观测,也叫拟准观测,使用拟准检定法检测相邻历元的观测值中的周跳。如果发现周跳,随即对该周跳进行修复,然后移动一个历元继续探测和修复。还提出了两种初始化的方案:多项式拟合法和最小二乘平差法。模拟试验表明R+1法可以用来检测和修复发生在一个观测序列中单个的或连续的周跳,也可以检测和修复同时发生在多个观测序列中的周跳,还可以检测发生在基准星上的周跳,对于双差载波相位,可以检测到小至1周的周跳。
A new technique to detect cycle slips in GPS carrier-phase is presented. The technique is summarized as follows： firstly, R sequential epochs are selected as normal epochs in simultaneous observation series, in which all observations are normal, also known as quasi-accurate observations to detect cyclic slips in adjacent epoch using quasi-accurate detection （QUAD） of gross errors. A cyclic slip is repaired at once or is found. Afterwards the considered interval is shifted by one epoch, and the above procedures are repeated. Two initialization strategies are suggested to select normal epochs in the beginning, one by polynomial fitting, and the other by least-square adjustment. Simulation experiment indicates that the R＋1 technique can detect and repair a single cyclic slip or consecutive cyclic slips in one carrier-phase, coinstantaneous multi-cyclic slips in the muhi-carrier phase and slips occurred in the base satellite. For double-difference observations, slips up to one cycle can be detected.
出处
《数据采集与处理》
CSCD
北大核心
2006年第2期203-208,共6页
Journal of Data Acquisition and Processing
基金
国家自然科学基金(40474009)资助项目
江苏省普通高校自然科学研究计划(03KJD420208)资助项目
