虚拟参考站对流层延迟算法

在VRS定位中,对影响虚拟站精度的对流层延迟仅是采取简单的基于参考站对流层延迟的几何距离内插模型,虽然此模型较简单,但是精度较差,不利于提高定位精度。因此,本文提出了一种考虑气象元素、纬度和高程对对流层的影响,结合数值气象学内插气象元素的方法,利用经典的对流层HOPFIELD模型以及MTT映射函数,估算出测站点的对流层延迟,通过数值分析,证明了此方法的可行性;特别是在低高度角的情况下,与传统方法相比,在精度及稳定性上有一定的提高。

Troposphere delay algorithm based on virtual reference station

In VRS location,to affect the accuracy of virtual station tropospheric delay,only a reference point of simple tropospheric delay is used based on geometric distance interpolation within the model,although this model is relatively simple,but poor accuracy,is not conducive to improve positioning accuracy.Therefore,this paper presented a method interpolating meteorological elements from numerical meteorology considering the effects of meteorological elements,latitude and elevation on the troposphere,using the classical troposphere HOPFIELD model and MTT mapping function,to estimate the tropospheric delay of the test site.By the numerical analysis the feasibility of the method was proved;particularly in the case of low elevation angle,compared with the traditional methods,the accuracy and stability improved to some extent.