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首页> 外文期刊>Space Weather >CEDAR electrodynamics thermosphere ionosphere (ETI) Challenge for systematic assessment of ionosphere/thermosphere models: Electron density, neutral density, NmF2, and hmF2 using space based observations
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CEDAR electrodynamics thermosphere ionosphere (ETI) Challenge for systematic assessment of ionosphere/thermosphere models: Electron density, neutral density, NmF2, and hmF2 using space based observations

机译:CEDAR电动力学热层电离层(ETI)对电离层/热层模型进行系统评估的挑战:使用基于空间的观测值的电子密度,中性密度,NmF2和hmF2

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摘要

In an effort to quantitatively assess the current capabilities of Ionosphere/Thermosphere (IT) models, an IT model validation study using metrics was performed. This study is a main part of the CEDAR Electrodynamics Thermosphere Ionosphere (ETI) Challenge, which was initiated at the CEDAR workshop in 2009 to better comprehend strengths and weaknesses of models in predicting the IT system, and to trace improvements in ionospheric/thermospheric specification and forecast. For the challenge, two strong geomagnetic storms, four moderate storms, and three quiet time intervals were selected. For the selected events, we obtained four scores (i.e., RMS error, prediction efficiency, ratio of the maximum change in amplitudes, and ratio of the maximum amplitudes) to compare the performance of models in reproducing the selected physical parameters such as vertical drifts, electron and neutral densities, NmF2, and hmF2. In this paper, we present the results from comparing modeled values against space-based measurements including NmF2 and hmF2 from the CHAMP and COSMIC satellites, and electron and neutral densities at the CHAMP satellite locations. It is found that the accuracy of models varies with the metrics used, latitude and geomagnetic activity level.
机译:为了定量评估电离层/热层(IT)模型的当前功能,我们进行了一项使用指标的IT模型验证研究。这项研究是CEDAR电动力学热层电离层(ETI)挑战的主要部分,该挑战于2009年在CEDAR研讨会上发起,目的是更好地理解模型在预测IT系统方面的优势和劣势,并追踪电离层/热层规范和预测。对于挑战,选择了两次强地磁风暴,四个中等风暴和三个安静时间间隔。对于选定的事件,我们获得了四个分数(即RMS误差,预测效率,振幅最大变化的比率和最大振幅的比率),以比较模型在再现选定的物理参数(例如垂直漂移)时的性能,电子和中性密度NmF2和hmF2。在本文中,我们介绍了将建模值与CHAMP和COSMIC卫星的NmF2和hmF2以及基于CHAMP卫星位置的电子密度和中性密度进行空天测量的结果进行比较的结果。发现模型的准确性随所使用的度量,纬度和地磁活动水平而变化。

著录项

  • 来源
    《Space Weather》 |2012年第10期|1-16|共16页
  • 作者单位

    Goddard Planetary Heliophysics Institute, University of Maryland Baltimore County, NASA Goddard Space Flight Center, Greenbelt, Maryland, USA.;

    NASA Goddard Space Flight Center, Greenbelt, Maryland, USA.;

    NASA Goddard Space Flight Center, Greenbelt, Maryland, USA.;

    School of Physics Astronomy and Computational Science, George Mason University, Fairfax, Virginia, USA.;

    Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA.;

    Space Weather Prediction Center, NOAA, Boulder, Colorado, USA.;

    High Altitude Observatory, National Center for Atmospheric Research, Boulder, Colorado, USA.;

    High Altitude Observatory, National Center for Atmospheric Research, Boulder, Colorado, USA.;

    Space Weather Prediction Center, NOAA, Boulder, Colorado, USA.;

    Plasma Physics Division, Naval Research Laboratory, Washington, D. C., USA.;

    Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA.;

    Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA.;

    Space Physics Research Laboratory, University of Michigan, Ann Arbor, Michigan, USA.;

    Center for Atmospheric and Space Sciences, Utah State University, Logan, Utah, USA.;

    Center for Atmospheric and Space Sciences, Utah State University, Logan, Utah, USA.;

    Center for Atmospheric and Space Sciences, Utah State University, Logan, Utah, USA.;

    Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA.;

    Air Force Research Laboratory, Albuquerque, New Mexico, USA.;

    Center for Space Science and Engineering Research, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA.;

    Center for Atmospheric and Space Sciences, Utah State University, Logan, Utah, USA.;

    Air Force Research Laboratory, Albuquerque, New Mexico, USA.;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Extraterrestrial measurements; Satellites; Satellite broadcasting; Storms; Density measurement; Ionosphere;

    机译:地外测量;卫星;卫星广播;风暴;密度测量;电离层;

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