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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Evaluation of Abel Inversion Method Assisted By an Improved IRI Model
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Evaluation of Abel Inversion Method Assisted By an Improved IRI Model

机译：评价亚伯反演方法的帮助下一个改进的IRI模型

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The most significant error of the radio occultation ionospheric retrieval is brought by the spherical symmetric assumption of electron density in Abel inversion. We developed an improved inversion method that attaches additional horizontal constraints based on a background model in Guo et al. (2015, https://doi.org/10.1016/j.jastp.2014.12.008) and found the effect of the method depends greatly on the accuracy of the background model. In this study, an improved ionospheric model, which applies radio occultation -based F_2-layer parameters and an adaptive topside model into the International Reference Ionosphere (IRI), is employed as a new choice of background model. The improved inversion is evaluated in several aspects in the middle- and low-latitudinal regions during equinox season (from 19 March to 18 April in 2008 and 2012) and throughout the year. Results show that the artificial plasma caves underneath the equatorial ionization anomaly crests caused by Abel inversion is to some extent eliminated during the daytime, and the negative electron densities in the E layer are also reduced by the improved method. The comparison between Constellation Observing System for Meteorology, Ionosphere, and Climate events and colocated incoherent scatter radar (ISR)/ionosonde observations indicates comparable accuracy of both methods. Moreover, the Global Ionosphere Maps is introduced as true reference of the vertical total electron density content. The mean vertical total electron density content errors derived through the improved inversion method are less than that of Abel inversion in the global scope.
机译：最重要的错误,收音机掩星电离层检索带来的电子的球面对称的假设密度在亚伯反演。高度提高反演方法基于一个额外的水平约束背景为模特在郭等人. (2015,https://doi.org/10.1016/j.jastp.2014.12.008)和发现该方法的效果很大程度上取决于背景模型的准确性。研究中,一种改进的电离层模型适用于无线电掩星的F_2-layer参数和自适应上部模型国际参考电离层(IRI)使用作为一个新的背景模型的选择。在几个改进反演评估中产阶级和low-latitudinal方面在equinox季节(从3月19日到的区域在2008年和2012年4月18日),在整个的一年。洞穴在赤道电离异常造成波峰亚伯反转一定程度上消除白天- E层中的电子密度也减少了改进的方法。对比星座观测系统电离层,气象和气候事件和托管的非相干散射雷达(ISR) / ionosonde观测表明可比这两种方法的准确性。介绍了电离层地图作为真实的参考垂直的总电子密度的内容。平均总电子密度垂直内容通过改进反演错误派生比伯反演方法少全球范围。

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