基于单差正交模型的GNSS伪距差分定位技术

全球卫星导航(Global Navigation Satellite System，GNSS)的伪距差分定位由于不需要解算整周模糊度，即使是在载波差分定位技术广泛应用在高精度差分定位的当代，伪距差分定位在辅助载波差分定位等方面依旧具有研究的意义。本文介绍了一种基于单差正交模型的伪距差分定位技术。它可以避免双差伪距所带来的观测量强相关和对参考卫星过分依赖的缺点，同时消除钟差项的影响。实验结果表明，码差分在动态定位时可以实现分米级的定位精度，可以用于辅助载波差分定位的快速解算。

GNSS Pseudo-Range Differential Positioning Based on Orthogonal Transformation Model

The pseudo-range differential positioning of the Global Navigation Satellite System (GNSS) does not have to solve the integer ambiguities. Thus, though the carrier phase differential positioning technology is widely used in high-precision differential positioning, the pseudo-range differential positioning still has research significance, which can be also used for constraining the performance of carrier phase differential positioning and other aspects. This paper introduces a pseudo-range differential positioning technology based on the single-difference orthogonal transformation model. It can eliminate the influence of the clock term and avoid the strong correlation of measurement and unnecessary reliance on the reference satellite caused by the double-difference pseudo-range at the same time. The experimental results show that the pseudo-range differential positioning can achieve the decimeter-level positioning accuracy in dynamic positioning, and then can be used to assist the rapid resolution of carrier phase differential positioning.