【摘要】 利用高灵敏度和高时空精度的三维雷电观测系统LMA(LightningMappingArray)分析穿云飞机的观测资料 ,发现这一系统在地面可探测到穿云飞机产生的 6 0～ 6 6MHz带宽内的电磁辐射 ,其强度在 1W～ 10kW之间 ,甚至更高 ,且与所探测到的辐射源数成线性反比 ,辐射是由飞机上的尖端放电产生的 .穿云飞机在 10～ 12km高度上产生的辐射最强 ,且在靠近发生闪电的对流区比远离这一区域强 .飞机穿过不同云系时 ,辐射强度不同 ,其中穿过层状云系时 ,辐射最弱 .更多还原

【Abstract】 The radiations produced by airplane flying through clouds were measured by using the New Mexico Tech Lightning Mapping Array (LMA) system with high space and time resolution on the ground. The analysis results indicate that the source powers of airplane radiation vary from minimum locatable values of about 1W typically up to 10kW or more in the 60～66MHz passband of the receivers and follow an approximate line inverse proportion to the numbers of radiation sources. This is a kind of radiation produced by discharge. The maximum powers of radiations occurred when airplane flew at 10～12km altitude or near the convective region with lightning flashes occurring. The powers of airplane radiation were different for different kinds of clouds through which airplane flew. The radiation sources of airplane were weakest when airplane flew through the cirrus clouds.更多还原