Optical estimation of auroral ion upflow: 2. A case study

M. Zettergren; J. Semeter; P.-L. BlellyG. SivjeeI. AzeemS. MendeH. GleisnerM. DiazO. Witasse

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Optical estimation of auroral ion upflow: 2. A case study

机译：光学极光离子向上流的估计:2。案例研究

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This work presents a detailed multi-instrument and modeling case study of an ion upflow event occurring over the Sondrestrom incoherent scatter radar on 17 February 2001. This case study is used to demonstrate the effectiveness of a previously developed optical estimator of ion upflow. The optical estimator of ion upflow is applied in a two step process: (1) near-infrared (NIR) optical observations in the 700–850 nm wavelength range are inverted to reconstruct the energy distribution of precipitating electrons then (2) the reconstructed precipitation is applied to a combined fluid-kinetic model of the ionosphere (TRANSCAR) to estimate the plasma response to the auroral particles. Plasma parameters estimated by this procedure are compared with plasma parameters derived from incoherent scatter radar data recorded during the event and are shown to be in reasonably good agreement. However, this study highlights an important limitation of the estimation technique, the lack of a direct measure of the ambient ionospheric state (nighttime plasma density). Means for addressing this limitation are discussed and may eventually allow for estimation of ionospheric state parameters under certain conditions by using optical sensors.

机译：这项工作提出了一个详细的multi-instrument和建模案例研究离子向上流的事件发生在Sondrestrom非相干散射2001年2月17日雷达。用于演示的效果以前开发的光学估计量的离子上升气流。应用在两个步骤:(1)近红外(NIR)光学观测在700 - 850海里波长范围是反向的重建电子能量分布的沉淀(2)重建的降水应用于fluid-kinetic模型相结合电离层(TRANSCAR)估计等离子体应对极光粒子。参数估计的过程相比之下,来自等离子体参数非相干散射雷达数据记录中事件和显示相当不错协议。重要的评估技术的限制,缺乏环境的直接测量电离层状态(夜间等离子体密度)。意味着解决这个限制讨论和最终可能允许估计在某些电离层状态的参数通过使用光学传感器条件。

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《Journal of Geophysical Research, A. Space Physics: JGR》 |2008年第7期|A07308-1-A07308-16-0|共16页
作者
M. Zettergren; J. Semeter; P.-L. BlellyG. SivjeeI. AzeemS. MendeH. GleisnerM. DiazO. Witasse;
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作者单位

Department of Electrical and Computer Engineering and Center for Space Physics, Boston University, Boston, Massachusetts, USA;

Research and Scientific Support Department of ESA, ESTEC, Noordwijk, Netherlands;

CESR, UMR 5187, Toulouse, FranceSpace Sciences Laboratory, University of California, Berkeley, California, USAPhysical Science Department, Embry-Riddle Aeronautical University, Daytona Beach, Florida, USADanish Meteorological Institute, Copenhagen, Denmark;

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Ions; upflow; incoherent scatter radaroptical sensorsCase studiesDIRECT METERINGopticalEstimation Techniquesenergy distribution;

机译：离子,上升气流;非相干散射radaropticalsensorsCase studiesDIRECTMETERINGopticalEstimation Techniquesenergy分布;

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Optical estimation of auroral ion upflow: 2. A case study

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