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Electrodynamic Parameters of the Auroral Oval from Combined Spacecraft and Ground Measurements

机译:组合航天器极光椭圆的电动参数与地面测量

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摘要

Spacecraft traversing the auroral oval respond primarily to the field-aligned currents at its poleward and equatorward borders that are part of a solenoidal current system. If electric and magnetic field measurements are done, it is possible to determine the integrated Pedersen conductivity of the auroral oval. On the ground, however, one detects primarily the magnetic effects of the Hall currents associated with the auroral oval electric field. If the Hall current can be determined, along with the electric field, one can obtain the Hall conductivity. Inversion of magnetic perturbations in the meridian traversed by the spacecraft can give the Hall current. The Automated Forward Modelling (AFM) method permits this to be done effectively. The method is described with an example based on FAST over the Churchill meridian in Canada. Studying temporal and spatial variations needs multiple instrumented meridians and spacecraft. Efforts to increase the number of instrumented meridians in Canada are described.
机译:穿越极光椭圆的航天器主要对电磁线圈电流系统一部分的极向和赤道边界处的场对准电流做出响应。如果进行了电场和磁场测量,则可以确定极光椭圆的积分Pedersen电导率。然而,在地面上,人们主要检测与极光椭圆形电场相关的霍尔电流的磁效应。如果可以确定霍尔电流以及电场,则可以获得霍尔电导率。航天器横穿的子午线中的磁扰动可以产生霍尔电流。自动前向建模(AFM)方法可以有效地做到这一点。以加拿大丘吉尔子午线上基于FAST的示例为例描述了该方法。研究时空变化需要多种经络和航天器。描述了增加加拿大经络子午线数量的努力。

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    Connors Martin;

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  • 年度 2006
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  • 原文格式 PDF
  • 正文语种 en
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