Backscatter ionogram inversion
Backscatter ionogram inversion
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DOI：
10.1109/radar.2003.1278769
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发表时间：
2003-09
期刊：
影响因子：
--
通讯作者：
R. Norman
中科院分区：
文献类型：
--
作者：
R. Norman
后向散射电离图（BSI）是一种显示使用地面扫频雷达时群路径或时间延迟与工作频率关系的图。在地面反向散射的情况下，接收到的信号从地球表面上的遥远位置反射。电离层是传输和接收信号都穿过的介质。反向散射电离图包含有关电离层状态的有用信息，在返回信号的时间和范围内，这可能是从发射器/接收器位置几千公里。后向散射电离图不同于更传统的垂直入射电离图，后者接收的信号是从探测器位置垂直上方的电离层区域反射的。反演反向散射电离图以获得电离层剖面的方法提供了遥感远距离电离层以及发生陆地和海洋散射的区域的重要手段。因此，后向散射电离图可以在超视距雷达频率管理系统中发挥重要作用。
A backscatter ionogram, BSI, is a plot showing the group path or time delay against operating frequency when using ground-based swept frequency radar. In the case of ground backscatter, the received signals are reflected from distant locations on the Earth's surface. The ionosphere is the medium through which both the transmitted and received signals traverse. A backscatter ionogram contains useful information regarding the state of the ionosphere at the time and over the range of the returned signal, which could be a few thousand kilometers from the transmitter/receiver location. Backscatter ionograms differ from the more conventional vertical incidence ionograms, where the received signals are reflected from a region of the ionosphere vertically above the sounder location. Methods of inverting backscatter ionograms to obtain ionospheric profiles offer an important means of remote sensing the distant ionosphere and regions in which land and sea scatter occur. Thus, backscatter ionograms can play an important role in the frequency management systems of over-the-horizon radar.