中长基线三频GNSS模糊度的快速算法

单历元基线解算一直是卫星导航定位中的热点和难点，随着北斗导航定位系统的全面组网，三频载波可以形成更多优良的组合观测值，有效地提高了单历元基线解算的精度和可靠性。本文在传统TCAR的基础上引入电离层延迟先验信息，将电离层延迟与位置参数和模糊度作为未知参数，采用最小二乘配置原理一并求解。同时，采用考虑电离层延迟影响的模糊度相关法约束模糊度搜索空间。结果表明，加入电离层延迟先验信息可以较大提高单历元模糊度固定的成功率；而采用考虑电离层延迟的模糊度相关法可以缩小模糊度搜索空间，有效地提高单历元模糊度解算的成功率和可靠性。

A New Method for Medium and Long Range Three Frequency GNSS Rapid Ambiguity Resolution

Single-epoch ambiguity resolution is always a challenging issue in the satellite navigation and positioning. With the development of BeiDou navigation and positioning system, the combination observations of three-frequency carrier phase can combine more excellent combination data, which could effectively improve the accuracy and reliability of the single-epoch ambiguity resolution. This paper adds a priori information of ionospheric delays, regards it and the location parameters and ambiguity as unknown parameters to be solved based on the traditional TCAR method and least squares collocation. Meanwhile, the ambiguity search space to be constricted by the ambiguity related method of considering ionospheric delays. The results showed that: add a prior information of ionospheric delays in unknown parameters can greatly improve the single-epoch ambiguity success rate; the ambiguity related method of considering ionospheric delays correction can reduce the ambiguity search space, and effectively improved the success rate and the reliability of single-epoch ambiguity resolution.