附有约束条件的精密单点动态定位

发布时间：2018-03-22 02:33

本文选题：精密单点动态定位　切入点：非差模式　出处：《西南交通大学》2016年硕士论文　论文类型：学位论文

【摘要】：随着时代的发展和科学技术的提高,测量方法也发生了革命性的变化。Global Positioning System (全球卫星导航定位系统,GPS)技术正是顺应时代的需求发展而来。作为GPS导航定位系统的热门研究方向,精密单点动态定位(Kinematic Precise Point Positioning,KPPP)理论与技术也不断走向成熟。尤其是在International GNSS Service(IGS)发布了精密星历和精密钟差产品之后,人们对这一领域的关注越来越多,其广泛的应用空间也使得精密单点动态定位具有广阔的发展前景。由于单点定位只使用一个接收机,利用的是非差数据,相对于差分的方法,一些系统误差无法消除。由于误差改正模型仍存在不完善的地方,以及受到诸多其他未知因素的影响,精密单点动态定位的精度仍然有待提高。本文通过约束接收机的运动轨迹,在卡尔曼滤波当中添加约束方程,以达到能够提高精密单点动态定位精度的目的。本文附加的约束条件包括沿某一直线运动和在某一平面运动两种方式。本文中精密单点动态定位采用消电离层模型,使用IGS发布的精密星历和精密钟差产品。解算后,将未约束与约束后得到的结果同基准站双差解进行对比,探讨其外符合精度。实验结果表明附加直线约束后的定位精度有明显提高,平面约束下也有所提高,但仍有其他因素影响其精度,需要将来进行更多的实验研究,探索其中的原因。总体来讲,在精密单点动态定位的过程中,对接收机的运动轨迹附加约束可以在事后定位中提高精度。
[Abstract]:With the development of society and the improvement of science and technology, the measurement method is changed.Global Positioning revolutionary System (global navigation satellite system, GPS) technology is developed to meet the requirements of the times. As a popular research direction of GPS navigation system, the precision of single point dynamic positioning (Kinematic Precise Point Positioning, KPPP) the theory and technology has been mature. Especially in the International GNSS Service (IGS) after the release of the precise ephemeris and precision clock products, more and more people focus on this field, and its wide application space also makes precise point positioning has a broad application prospect. Because of using only a single point positioning the receiver, using the non difference data, difference method with respect to some systematic errors cannot be eliminated. The error correction model is still not perfect place to And affected by many other unknown factors, dynamic precise point positioning accuracy still needs to be improved. The trajectory constraint receiver, adding constraint equations in the Calman filter, in order to achieve to improve the precision of single point dynamic positioning accuracy. This paper includes additional constraints along a linear motion and at a the plane motion in two ways. The precision of single point dynamic positioning using ionosphere model, using the IGS release of the precise ephemeris and precision clock products. The solution will not be constrained, and constraints result with the base station double difference solution compared to the elevation precision. The experimental results show that the additional linear positioning the constraint precision is greatly improved, also improved planar constraints, but there are still other factors affecting its accuracy, need to conduct more experiments on the future, explore the original In general, in the process of precise single point dynamic positioning, the additional constraint on the motion trajectory of the receiver can improve the accuracy in the post positioning.

【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P228.4

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