基于Hopfield模型改进射线描迹的对流层延迟估计
发布时间：2018-08-29 07:23
【摘要】：针对射线描迹法在估计对流层延迟方面受限于探空观测的问题,提出利用Hopfield模型改进射线描迹的对流层延迟估计方法。该方法利用Hopfield模型中的干、湿折射率计算公式,建立对流层大气折射指数剖面模型,并将其应用到射线描迹法改进中,克服探空观测的限制,扩大了射线描迹法的适用范围。选取国际GPS服务组织(IGS)中四个测站的气象数据,分别采用改进射线描迹模型和基于Neil映射函数(NMF)的Hopfield模型、Saastamoinen模型进行对流层延迟估计,计算结果表明,改进射线描迹模型的估计精度优于其他两种模型,为对流层延迟实时监测应用提供了新的方法。
[Abstract]:Aiming at the problem that ray tracing method is limited by sounding observation in estimating tropospheric delay, an improved tropospheric delay estimation method based on Hopfield model is proposed. Using the formula of dry and wet refractive index in Hopfield model, the model of atmospheric refraction index profile in troposphere is established, and it is applied to the improvement of ray tracing method, which overcomes the limitation of radiosonde observation and expands the scope of application of ray tracing method. The meteorological data of four stations in the international GPS service organization (IGS) are selected, and the improved ray tracing model and the Hopfield model Saastamoinen model based on the Neil mapping function (NMF) are used to estimate the tropospheric delay, respectively. The estimation accuracy of the improved ray tracing model is better than that of the other two models, which provides a new method for the application of real-time tropospheric delay monitoring.
【作者单位】： 空军工程大学防空反导学院;西北核技术研究所;
【分类号】：TN011.3;TN967.1
，
本文编号：2210591
[Abstract]:Aiming at the problem that ray tracing method is limited by sounding observation in estimating tropospheric delay, an improved tropospheric delay estimation method based on Hopfield model is proposed. Using the formula of dry and wet refractive index in Hopfield model, the model of atmospheric refraction index profile in troposphere is established, and it is applied to the improvement of ray tracing method, which overcomes the limitation of radiosonde observation and expands the scope of application of ray tracing method. The meteorological data of four stations in the international GPS service organization (IGS) are selected, and the improved ray tracing model and the Hopfield model Saastamoinen model based on the Neil mapping function (NMF) are used to estimate the tropospheric delay, respectively. The estimation accuracy of the improved ray tracing model is better than that of the other two models, which provides a new method for the application of real-time tropospheric delay monitoring.
【作者单位】： 空军工程大学防空反导学院;西北核技术研究所;
【分类号】：TN011.3;TN967.1
，
本文编号：2210591
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