GPS中性大气折射延迟的研究

A DISCUSSION ON ASTRONOMICAL CORRECTION METHOD FOR GPS NEUTRAL ATMOSPHERIC REFRAETION DELAY

简述了GPS大气折射延迟研究的进展,针对GPS对中性大气折射延迟改正精度的要求,给出了研究天文大气折射和中性大气折射延迟的一个可能方法,即:基于映射函数形式的天文大气折射模型,利用不同方位的天文大气折射值的测定数据,求解映射函数中的参数,进而可建立随观测站和随方位而异的大气折射延迟改正模型。

This paper summarizes the progresses of the research on GPS neutral atmospheric refraction delay. In the light of the requirements of GPS for the correction accuracy of the neutral atmospheric refraction delay, a method which may be the approach to the astronomical atmosphere refraction is prosented, namely, on the basis of the astronomical atmosphere refraction model expressed in mapping function, and by use of the measured data of the astronomical atmospheric refraction with different azimuths, the parameters in mapping functions are calculated, thus the atmospheric refraction delay correction models can be established, they are different with different observing stations and azimuths.