The Effects of Space Weather on Radio Systems with a Focus on HF Systems
The Effects of Space Weather on Radio Systems with a Focus on HF Systems
复制标题
空间天气对无线电系统的影响（重点是高频系统）
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
A. Shukla
中科院分区：
文献类型：
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作者：
P. Cannon;M. Angling;J. Heaton;N. Rogers;A. Shukla
如果环境是各向同性的，并且在时间上是稳定的，那么确定它对RF波传播的影响就相对容易。不幸的是，情况并非如此。不均匀性的空间尺度从数千公里到尺度小于一米的湍流不等。同样，时间尺度也有许多数量级的变化，从多年（太阳周期对电离层传播的影响）到几小时甚至几分钟（天气现象的尺度）。由于这种可变性，需要及时和可靠的战略，以具体说明和准确预测环境，并评估将改进系统功能的行动对业务业绩的影响。本文将回顾这些现象，并描述它们对一些系统的影响。将详细讨论空间气象对高频系统的影响，并将描述减轻其影响的战略。
If the environment were isotropic and stable in time, it would be relatively easy to determine its effects on the propagation of RF waves. Unfortunately, this is not the case. The spatial scales of inhomogenities vary from thousands of kilometres to turbulence with scale sizes of a less than a metre. Likewise the temporal scales vary over many orders of magnitude from many years (solar cycle effects on ionospheric propagation) to hours or even minutes (the scale of weather phenomena). As a consequence of this variability, timely and reliable strategies are required to both specify and accurately forecast the environment and to assess the attendant impact on the operational performance of action that will improve the system functionality. This paper will review these phenomena and describe their impact on a number of systems. The effect that space weather has on high frequency (HF) systems will be addressed in some detail and strategies for mitigating its effects will be described.