The Unaided Single Frequency/Single Epoch Global Navigation Satellite System (SF/SE GNSS) model is the most challenging scenario for ambiguity resolution in the GNSS attitude determination application. To improve the performance of SF/SE-GNSS ambiguity resolution without excessive cost, the Micro-Electro-Mechanical System Inertial Measurement Unit (MEMS-IMU) is a proper choice for the auxiliary sensor that carries out the inertial attitude augmentation. Firstly, based on the SF/SE-GNSS compass model, the Inertial Derived Baseline Vector (IDBV) is defined to connect the MEMS-IMU attitude measurement with the SF/SE-GNSS ambiguity search space, and the mechanism of inertial attitude augmentation is revealed from the perspective of geometry. Then, through the quantitative description of model strength by Ambiguity Dilution of Precision (ADOP), two ADOPs are specified for the unaided SF/SE-GNSS compass model and its inertial attitude augmentation counterparts, respectively, and a sufficient condition is proposed for augmenting the SF/SE-GNSS model strength with inertial attitude measurement. Finally, in the framework of an integer aperture estimator with fixed failure rate, the performance of SF/SE-GNSS ambiguity resolution with inertial attitude augmentation is analyzed when the model strength is varying from strong to weak. The simulation results show that, in the SF/SE-GNSS attitude determination application, MEMS-IMU can satisfy the requirements of ambiguity resolution with inertial attitude augmentation.
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机译：对于GNSS姿态确定应用程序中的歧义解析，无助单频/单历时全球导航卫星系统（SF / SE GNSS）模型是最具挑战性的方案。为了在不增加成本的情况下提高SF / SE-GNSS模糊度分辨率的性能，微机电系统惯性测量单元（MEMS-IMU）是执行惯性姿态增强的辅助传感器的合适选择。首先，基于SF / SE-GNSS指南针模型，定义了惯性推导基线矢量（IDBV），以将MEMS-IMU姿态测量与SF / SE-GNSS歧义搜索空间联系起来，惯性姿态增强的机制是从几何学角度揭示。然后，通过精度歧义稀释度（ADOP）对模型强度的定量描述，分别为无辅助SF / SE-GNSS指南针模型及其惯性姿态增强对应物指定了两个ADOP，并提出了增强该条件的充分条件。 SF / SE-GNSS模型强度与惯性姿态测量。最后，在具有固定故障率的整数孔径估计器的框架中，分析了当模型强度从强到弱变化时，SF / SE-GNSS模糊度分辨率与惯性姿态增强的性能。仿真结果表明，在SF / SE-GNSS姿态确定应用中，MEMS-IMU可以通过惯性姿态增强来满足模糊度的要求。
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