Radar Echoes from High Altitudes and Their Relationship to Lightning, Red Sprites, Blue Jets, and Elves

高空雷达回波及其与闪电、红色精灵、蓝色喷射和精灵的关系

• 批准号: 9633577
• 负责人: Roland Tsunoda
• 金额: $ 9.98万
• 依托单位: SRI International
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-09-15 至 1998-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9633577&HistoricalAwards=false
• 关键词: Radar; Echoes; Altitudes; Their; Relationship

The PI will investigate the nature of radar echoes that occur at altitudes well above those of thunderclouds, yet related to lightning discharges. This high-altitude echo appears immediately after the impulsive occurrence of electromagnetic radiation emitted by a lightning discharge. Radio signals can be retrieved from this area of interest, promising the potential availability of new electrodynamical information, and this project will determine the nature of these radar echoes and assess their informational capability. Subvisual optical flashes (red sprites, blue jets, and elves) occur in the same altitude region, confirming that electrical coupling processes are operating. The PI will draw diagnostic information from radar echoes, complementary to that obtained from optical and spectrographic measurements to further constrain the possible theoretical models for this phenomena.

PI将调查雷达回波的性质，这些回波发生在雷雨云之上的高度，但与闪电有关。这种高空回波在闪电放电发出的电磁辐射脉冲发生后立即出现。无线电信号可以从这个感兴趣的区域中检索，有望获得新的电动力学信息，该项目将确定这些雷达回波的性质并评估其信息能力。亚视光学闪光（红色精灵、蓝色喷流和精灵）出现在同一海拔区域，证实了电耦合过程正在运行。PI将从雷达回波中提取诊断信息，补充从光学和光谱测量中获得的信息，以进一步限制这种现象的可能理论模型。