测量从飞机飞过高云层发出的非常高频源的位置和特性
Olaf Scholten1,2, Marten Lourens3,4, Stijn Buitink5
1Kapteyn Astronomical Institute, University of Groningen, AB Groningen, Netherlands. o.scholten@rug.nl.
Nature communications
|November 26, 2025
概括
研究人员发现了飞机飞过云层发出的非常高频无线电脉冲的来源. 这些无线电辐射源自飞机.
科学领域:
- 无线电天文学 无线电天文学
- 大气物理大气物理学
- 航空航天工程是航空航天工程.
背景情况:
- 飞机在飞行过程中会产生宽带无线电脉冲.
- 之前的研究无法确定飞机上的排放区域.
- 这些脉冲通常用于校准或作为背景噪声.
研究的目的:
- 在发射非常高频 (VHF) 无线电脉冲的飞机上定位特定区域.
- 了解飞机如何释放云层中获得的电荷.
- 通过使用飞机排放来完善闪电观测技术.
主要方法:
- 使用低频阵列 (LOFAR) 来拍摄闪电.
- 偶然地检测并分析了波音777-300ER飞机的VHF无线电脉冲.
- 应用先进的信号处理来确定脉冲的来源和极化.
主要成果:
- 精确地定位了飞机发动机的VHF无线电脉冲排放以及飞机尾部的一个点.
- 实现位置精度超过50厘米,偏振精度在25°以内.
- 没有证实来自静电的排放,即使在8公里高度.
结论:
- 飞机发动机和特定的尾部是VHF无线电脉冲的主要来源.
- 这些排放提供了对飞机电荷消散机制的见解.
- 改进的技术提高了无线电天文观测的准确性.
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