A New Method for Reconstruction of Regional Three-Dimensional Electron Density Distributions Using AI-Based Data Assimilation Method and Incoherent Scatter Radar Measurements

IF 4.6 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Geophysical Research Letters Pub Date : 2024-11-20 DOI:10.1029/2024GL112352

Chenghao Li, Hanxian Fang, Xiaoqun Cao, Die Duan, Chao Xiao, Hongtao Huang, Ganming Ren, Yang Lin, Yihui Cai

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Abstract

The ionosphere's dynamic structure affects electromagnetic radiation by altering radio wave propagation, impacting daily communications. The characteristics of the ionosphere are primarily characterized by electron density parameters. This paper proposes a method to construct Three-Dimensional (3-D) electron density distributions with arbitrary spatiotemporal resolution in ISR observational regions. The method, termed Artificial Intelligence-based data assimilation (AI-Assim), integrates data assimilation directly into a neural network. It assimilates electron density from the IRI-2020 model to fill ISR observation gaps. Experiments conducted using the Sanya Incoherent Scatter Radar (SYISR) in Hainan, China, successfully constructed a 3-D electron density structure over the region, with a 0.2° latitude/longitude resolution and 1 km height resolution. The method's effectiveness was validated by calculating the mean square error and comparing the results with digisonde measurements.

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利用基于人工智能的数据同化方法和非相干散射雷达测量重建区域三维电子密度分布的新方法

电离层的动态结构通过改变无线电波的传播来影响电磁辐射，从而影响日常通信。电离层的特征主要由电子密度参数表征。本文提出了一种在 ISR 观测区域构建具有任意时空分辨率的三维（3-D）电子密度分布的方法。该方法被称为基于人工智能的数据同化（AI-Assim），将数据同化直接集成到神经网络中。它从 IRI-2020 模型中同化电子密度，以填补 ISR 观测空白。利用中国海南三亚非相干散射雷达（SYISR）进行的实验成功构建了该地区的三维电子密度结构，经纬度分辨率为0.2°，高度分辨率为1千米。通过计算均方误差并将结果与数字探空仪的测量结果进行比较，验证了该方法的有效性。

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来源期刊

Geophysical Research Letters 地学-地球科学综合

CiteScore

9.00

自引率

9.60%

发文量

1588

审稿时长

2.2 months

期刊介绍： Geophysical Research Letters (GRL) publishes high-impact, innovative, and timely research on major scientific advances in all the major geoscience disciplines. Papers are communications-length articles and should have broad and immediate implications in their discipline or across the geosciences. GRLmaintains the fastest turn-around of all high-impact publications in the geosciences and works closely with authors to ensure broad visibility of top papers.