一种新的GPS单频单历元定姿算法研究

将全球卫星定位系统(GPS)单历元的L1波段的载波相位和码相位观测方程进行组合求解整周模糊度的浮点解。基于对浮点解与固定解间关系的分析,提出了一种将低精度浮点解映射到固定解的方法,降低了最小二乘降相关平差(LAMBDA)算法对高精度浮点解的依赖性,避免了多个历元求解高精度浮点解,实现了单频、单历元的整周模糊度估计。实际数据测试结果表明:算法的成功率大于95%,能有效地实时解算动态姿态。

New Methods for Single Epoch Single Frequency Attitude Determination Using GPS

The phase and code measurements of L1 band for just one epoch in global positioning system were combined to obtain a float solution to the ambiguities in this paper.Based on the analysis of the relationship between the float solution and fixed solution from the LAMBDA algorithm,a new method which could fix the low precise float ambiguity to the correct integer ambiguity was given out,which would reduce the dependency of the high precise float resolution for LAMBDA method which needed many epochs to obtain,so the integer ambiguities could be estimated in single epoch and single frequency.The experiment results in an actual testing showed that the success rate was more than 95%,and this method was effective for real-time calculation of kinematic attitude.