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中文摘要：
利用GPS对载体的姿态进行测量是其应用的一个较新领域，直接求解姿态矩阵进行姿态角解算是一种直接有效的方法，但是解算精度受周跳、基线长度及卫星几何分布等因素的影响。在对直接求解姿态矩阵算法的解算过程进行深入分析的基础上，定量分析了周跳、基线长度等关键因素对测姿精度的影响，并通过计算机仿真对精度分析结果进行验证。开展的研究分析为提高GPS姿态测量精度提供了有效的参考依据。
英文摘要：
Attitude determination using GPS is a new application domain of GPS, and calculating attitude matrix directly is an effective method. However, the precision of solution are affected by cycle hop, length of base line, satellite＇s geometry distribution and other factors. The solution process of direct method of calculating attitude matrix is deeply analyzed. Quantitative analysis results that affected by all above factors are shown. The simulation have validated precision analysis result. A reference improving the precision of attitude determination using GPS is provided by the research on precision analysis.
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