Multi-Frequency SuperDARN HF Radar Observations of the Ionospheric Response to the October 2023 Annular Solar Eclipse

IF 4.6 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Geophysical Research Letters Pub Date : 2024-12-12 DOI:10.1029/2024GL112450

E. G. Thomas, S. G. Shepherd, B. S. R. Kunduri, D. R. Themens

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Abstract

An annular solar eclipse was visible on 14 October 2023 from 15:00–21:00 UT as its path traveled across North, Central, and South America. In this letter, we present the first multi-frequency Super Dual Auroral Radar Network (SuperDARN) observations of the bottomside ionospheric response to a solar eclipse using a novel experimental mode designed for the October 2023 annular eclipse. We compare our results from the mid-latitude Christmas Valley East radar with measurements of the vertical electron density profile from the nearby Boulder Digisonde, finding the changes in 1- and 2-hop ground scatter skip distance are well correlated with the $F_{2}$ -layer density response, which lags the peak obscuration by $\sim$ 30 min. Changes in the line-of-sight Doppler shifts are better aligned with the time derivative of eclipse obscuration.

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2023年10月日环食对电离层响应的多频超高频雷达观测

2023年10月14日15:00-21:00世界时，日环食经过北美、中美和南美，可见日环食。在这封信中，我们介绍了第一个多频超级双极光雷达网络（SuperDARN）对日食底部电离层响应的观测，使用了为2023年10月日环食设计的新颖实验模式。我们将中纬度圣诞谷东部雷达的结果与附近博尔德Digisonde的垂直电子密度剖面测量结果进行了比较，发现1和2跳地面散射跳跃距离的变化与F2${F}_{2}$-层密度响应具有良好的相关性，该响应滞后于峰值遮挡约${\sim} $30 min。视距多普勒频移的变化与日食遮挡的时间导数更好地一致。

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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.