多条件约束的单频单历元整周模糊度确定

摘要

利用双GPS接收机构成短基线矢量进行定向的技术中针对基线长度已知的情况，将基线的长度信息线性化后融入双差载波观测方程中。分析并证明了融合长度信息后将提高整周模糊度浮点解的精度同时将降低彼此间的相关性。同时利用低成本的倾角传感器测得基线向量的俯仰角信息与基线长度信息一起作为解算的约束条件，将缩小整周模糊的搜索空间从而提高解算的成功率。最后通过实测的数据对上述方法的性能进行定量分析，结果表明该方法能够显著提高单频单历元数据整周模糊度解算的成功率。%ln the orientation technique with short baseline constituted by double GPS receivers,a linear expression of baseline can be put forward and added into the double difference carrier observation equation for the situation with known baseline length.A theoretical proof that the precision of float solutions of the integer ambiguities is improved while the relation of the ambiguities declined when the information of baseline length melt into observation equation is given in this paper.ln the process using length and pitch angle of baseline as constraints to compress the searching space and improve the preci-sion and correct rate of integer ambiguities.At last,a series of experiments is done to make quantitative analysis for the performance of this method.