GPS单频单历元定姿算法性能分析与改进方法

为了提高LAMBDA在单频单历元情况下的性能和成功率,对该定姿算法的性能进行了理论研究,分析了影响搜索效率的因素,并提出了一种新的求解模型.将未知的整周模糊度拟合成噪声,能够显著提高搜索效率,同时利用模糊度存在范围等约束条件对原算法的成功率进行了改善.实验表明:相比于原算法,改进算法能够有效减少GPS姿态解算的时间,同...

Performance analysis and improved method for single epoch, single frequency attitude determination using GPS

The baseline constrained LAMBDA method is an effective algorithm for attitude determination using GPS signal, but the performance and success rate for single epoch, single frequency applications need to be improved. To deal with this problem, the performance of original algorithm was studied through the analysis of the factors affecting the search efficiency. A new model in which the unknown integer ambiguities are treated as noise was given for a further improvement of the search efficiency, and at the same time the success rate was also improved with the constrained value of the integer ambiguity. The testing results show that the time consumption of the proposed algorithm decreases sharply over that of the original algorithm while the success rate of GPS attitude determination increases significantly.