High total electron content observed over Zambia

IF 2.8 3区地球科学 Q2 ASTRONOMY & ASTROPHYSICS

Advances in Space Research Pub Date : 2025-03-13 DOI:10.1016/j.asr.2025.03.023

Tshimangadzo Merline Matamba , Donald W. Danskin , John Bosco Habarulema

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Abstract

In this paper, the ionospheric variations over the low- and mid-latitude South African National Space Agency (SANSA) GNSS receivers are used to study a period where the Zambia GPS receiver observes high total electron content (TEC). Several receivers located in Namibia, Zambia, Kenya, and Uganda are utilized from 23 Feb to 1 Mar 2023 to investigate the spatial variability of TEC values over the mid- and low-latitude locations. The long-lasting high TEC (

>

6 h and

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30 TECU above typical value for the hour) is observed over the northern latitudes of Zambia and Namibia on 24, 27 Feb, and 1 Mar 2023. The long-lasting high TEC does not have clear magnetic signature to determine when the effect does or does not occur. The enhanced TEC is found not to be dependent on geomagnetic activity. For some of the periods, the high TEC is associated with the movement of the southern crest of the equatorial ionization anomaly to more southern locations as confirmed by the electron density measurements from the Langmuir probe on Swarm-C satellite.

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在赞比亚观测到高总电子含量

本文利用南非国家航天局（SANSA） GNSS接收机的低纬度和中纬度电离层变化，研究了赞比亚GPS接收机观测到高总电子含量（TEC）的一个时期。2023年2月23日至3月1日，利用位于纳米比亚、赞比亚、肯尼亚和乌干达的几个接收器调查了中低纬度地区TEC值的空间变异性。2023年2月24日、27日和3月1日在赞比亚和纳米比亚的北纬地区观测到持久的高TEC（比典型值高6小时和30 TECU）。持久的高TEC没有明确的磁性特征来确定何时会发生效果或不会发生。发现增强的TEC不依赖于地磁活动。Swarm-C卫星上Langmuir探测器的电子密度测量结果证实，在某些时期，高TEC与赤道电离异常的南波峰向更南的位置移动有关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advances in Space Research 地学天文-地球科学综合

CiteScore

5.20

自引率

11.50%

发文量

800

审稿时长

5.8 months

期刊介绍： The COSPAR publication Advances in Space Research (ASR) is an open journal covering all areas of space research including: space studies of the Earth''s surface, meteorology, climate, the Earth-Moon system, planets and small bodies of the solar system, upper atmospheres, ionospheres and magnetospheres of the Earth and planets including reference atmospheres, space plasmas in the solar system, astrophysics from space, materials sciences in space, fundamental physics in space, space debris, space weather, Earth observations of space phenomena, etc. NB: Please note that manuscripts related to life sciences as related to space are no more accepted for submission to Advances in Space Research. Such manuscripts should now be submitted to the new COSPAR Journal Life Sciences in Space Research (LSSR). All submissions are reviewed by two scientists in the field. COSPAR is an interdisciplinary scientific organization concerned with the progress of space research on an international scale. Operating under the rules of ICSU, COSPAR ignores political considerations and considers all questions solely from the scientific viewpoint.