In the Global Navigation Satellite System (GNSS), the multipath error affected by many aspects is the main error source that affects satellite navigation, and it is difficult to establish a much more accurate model to analyze it. Based on the ground multipath reflection model, it firstly deeply studies the influence of GNSS satellite orbit parameters on multipath fading frequency and establishes a multipath signal model related to satellite orbit parameters. Secondly, the influence of carrier phase cycle slip, receiver clock adjustment, and GNSS satellite orbit on multiparameter- (MP-) combined observations is analyzed in detail based on the measured data. Finally, aiming at the common phenomenon of code-carrier divergence in the Beidou system, the elevation-based pseudorange correction model and a sidereal filtering are built to correct the MP errors; experiments with measured data show that there is a fluctuation range reduction of 35.7% after sidereal filtering when the receiver reaches a steady state.

中文翻译：

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GNSS中基于多参数组合观测的多径处理技术

在全球导航卫星系统（GNSS）中，受许多方面影响的多径误差是影响卫星导航的主要误差源，很难建立更准确的模型来对其进行分析。首先基于地面多径反射模型，深入研究了GNSS卫星轨道参数对多径衰落频率的影响，建立了与卫星轨道参数有关的多径信号模型。其次，根据实测数据，详细分析了载波相位周期滑移，接收机时钟调整和GNSS卫星轨道对多参数（MP-）组合观测的影响。最后，针对北斗系统中码载波发散的普遍现象，建立基于高程的伪距校正模型和恒星滤波以校正MP误差；根据实测数据进行的实验表明，当接收机达到稳态时，经过恒星滤波后的波动范围减小了35.7％。