This paper mainly studies the method restraining Doppler ambiguity induced by small antenna in the condition of error. 主要研究如何在误差环境下抑制由小天线引入的多普勒模糊的信号处理方法。
But on the other hand it is very difficult to determine integer ambiguity while surveying with RTK since survey time is too short and the error condition changes too much which all affect the final positioning precision greatly. 但是,由于在动态点上观测时间较短,各种类型误差变化较大,很难准确实时计算出整周模糊度,进而极大地影响了定位精度。
The floating point solution of integer ambiguity resolution and relevant variance-covariance matrix are applied to construct the search space, from which the correct integer ambiguity resolution is picked out according to the quadratic form of least residual error. 采用整周模糊度的浮点解及相应的方差协方差阵构成整数模糊度的搜索空间,在所有可能的候选值中以最小残差二次型为准则选出正确的整周模糊度。
The direct computation method used to estimate attitude parameter is introduced, then the integer ambiguity is resolved by utilizing Z-transformation augmented FASF algorithm. At last, the software flow of attitude determination system in which stand-alone position error is compensated and the experiment result are presented. 介绍GPS姿态测量系统的直接计算法,然后采用Z变换增强FASF算法求解载波相位整周模糊值,最后给出了采用补偿单点定位误差的GPS姿态测量系统的系统流程和计算机实验结果。
Unreasonable ambiguities are rejected according to base-line and the best ambiguity is achieved by error list and the historical test is introduced. 利用基线约束剔除不合理的整周模糊度组合,通过残差列表获取最优模糊度,并引入历史检测。
After the examples are analyzed, there are problems which need to be solved such as ambiguity, real-time clock bias error and the estimate method of zenith wet delay. 通过对算例的分析,提出需要解决的问题:整周模糊度、实时钟差和天顶湿延迟的估计方法。
Integer ambiguity is a key problem of carrier phase range measurement, and any error will lead to large worsening of positioning precise. 整周模糊度是载波相位测量定位的关键问题,不正确的解算结果会使得接收机定位精度急剧恶化。
In kinematic GPS, the integer ambiguity and tropospheric delay are the main error sources that affect the positioning accuracy. 在动态GPS定位中,整周模糊度、对流层延迟是目前影响其定位精度提高的主要误差源。