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日冕物质抛射(CME)是灾害性空间天气的主要驱动源，如何针对特定的CME事件, 了解其在日冕和行星际空间的传播特性及演化过程，预测近地空间太阳风状态的变化，是空间天气研究领域的重要内容，同时受到国内外学者的广泛关注，近年来，在CME传播特性的观测和数值模拟研究中取得了大量进展。
A technique for calculating meteor plasma density and meteoroid mass from radar head echo scattering
Meteors Meteoroids Rada Radio observations
2017/3/22
Large-aperture radars detect the high-density plasma that forms in the vicinity of a meteoroid and moves approximately at its velocity;
reflections from these plasmas are called head echoes. To deter...