【摘要】：針對射線描跡法在估計對流層延遲方面受限于探空觀測的問題,提出利用Hopfield模型改進(jìn)射線描跡的對流層延遲估計方法。該方法利用Hopfield模型中的干、濕折射率計算公式,建立對流層大氣折射指數(shù)剖面模型,并將其應(yīng)用到射線描跡法改進(jìn)中,克服探空觀測的限制,擴(kuò)大了射線描跡法的適用范圍。選取國際GPS服務(wù)組織(IGS)中四個測站的氣象數(shù)據(jù),分別采用改進(jìn)射線描跡模型和基于Neil映射函數(shù)(NMF)的Hopfield模型、Saastamoinen模型進(jìn)行對流層延遲估計,計算結(jié)果表明,改進(jìn)射線描跡模型的估計精度優(yōu)于其他兩種模型,為對流層延遲實(shí)時監(jiān)測應(yīng)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.
【作者單位】： 空軍工程大學(xué)防空反導(dǎo)學(xué)院;西北核技術(shù)研究所;
【分類號】：TN011.3;TN967.1
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本文編號：2210591