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
E. G. Thomas, S. G. Shepherd, B. S. R. Kunduri, D. R. Themens
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引用次数: 0

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 ${F}_{2}$ -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.

Abstract Image

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
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.
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