中文摘要：

GPS用于解算载体的姿态时必需解决的关键问题之一就是整周模糊度的确定。利用GPS现代化后拥有多个载波频率的特性,分析了三载波模糊度解算技术（TCAR）在GPS卫星系统中解算模糊度的特点,结合整数最小二乘及其降相关平差法（LAMBDA）的搜索原理实现了GPS卫星系统整周模糊度的单历元解算,并获得很高的成功率,克服了TCAR技术模糊度确定错误率较高的缺点。以三根静止天线为研究对象,进行MATLAB仿真试验,仿真结果表明,该方案完全可行,适合单历元姿态确定。

英文摘要：

One of a key issue in the aspect of GPS attitude determination is the ambiguity determination.Using modernized GPS features with multiple carrier frequency analyses the features of Three-Carrier Ambiguity Resolution（TCAR） Technique in GPS.For the lack of TCAR technique whose error rate is higher,a method which achieves the single epoch GPS ambiguity determination is that the TCAR technique combines the searching principle of the least-squares ambiguity decorrelation adjustment（LAMBDA）.Compared to traditional TCAR,it wins a higher success probability of Integer ambiguity determination.The algorithm is applied to attitude determination for three static antenna in the simulation by MATLAB.The result indicates that the method is feasible and is suitable for single epoch GPS attitude determation.