A technique for volumetric incoherent scatter radar analysis

IF 1.7 4区地球科学 Q3 ASTRONOMY & ASTROPHYSICS

Annales Geophysicae Pub Date : 2023-01-19 DOI:10.5194/angeo-41-55-2023

J. Stamm, J. Vierinen, B. Gustavsson, A. Spicher

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引用次数: 3

Abstract

Abstract. Volumetric measurements of the ionosphere are important for investigating spatial variations of ionospheric features, like auroral arcs and energy deposition in the ionosphere. In addition, such measurements make it possible to distinguish between variations in space and time. While spatial variations in scalar quantities such as electron density or temperature have been investigated with incoherent scatter radar (ISR) before, spatial variation in the ion velocity, which is a vector quantity, has been hard to measure. The upcoming EISCAT3D radar will be able to do volumetric measurements of ion velocity regularly for the first time. In this paper, we present a technique for relating volumetric measurements of ion velocity to neutral wind and electric field. To regularize the estimates, we use Maxwell's equations and fluid-dynamic constraints. The study shows that accurate volumetric estimates of electric field can be achieved. Electric fields can be resolved at altitudes above 120 km, which is the altitude range where auroral current closure occurs. Neutral wind can be resolved at altitudes below 120 km.

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体积非相干散射雷达分析技术

摘要电离层的体积测量对于研究电离层特征的空间变化非常重要，如极光弧和电离层中的能量沉积。此外，这种测量使区分空间和时间的变化成为可能。虽然以前已经用非相干散射雷达(ISR)研究了电子密度或温度等标量量的空间变化，但离子速度作为矢量的空间变化很难测量。即将推出的EISCAT3D雷达将首次能够定期对离子速度进行体积测量。在本文中，我们提出了一种将离子速度的体积测量与中性风和电场联系起来的技术。为了正则化估计，我们使用了麦克斯韦方程组和流体动力学约束。研究表明，该方法可以实现准确的电场体积估计。电场可以在120公里以上的高度分辨，这是发生极光电流闭合的高度范围。中性风可以在120公里以下的高度分辨。

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

Annales Geophysicae 地学-地球科学综合

CiteScore

4.30

自引率

0.00%

发文量

审稿时长

2 months

期刊介绍： Annales Geophysicae (ANGEO) is a not-for-profit international multi- and inter-disciplinary scientific open-access journal in the field of solar–terrestrial and planetary sciences. ANGEO publishes original articles and short communications (letters) on research of the Sun–Earth system, including the science of space weather, solar–terrestrial plasma physics, the Earth''s ionosphere and atmosphere, the magnetosphere, and the study of planets and planetary systems, the interaction between the different spheres of a planet, and the interaction across the planetary system. Topics range from space weathering, planetary magnetic field, and planetary interior and surface dynamics to the formation and evolution of planetary systems.