Electron energy and electric field estimates in sprites derived from ionized and neutral N2 emissions -: art. no. 1462
Electron energy and electric field estimates in sprites derived from ionized and neutral N2 emissions -: art. no. 1462
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DOI：
10.1029/2001gl014018
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发表时间：
2002-05-15
影响因子：
5.2
通讯作者：
Osborne, D
中科院分区：
文献类型：
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作者：
Morrill, J;Bucsela, E;Osborne, D
[1] 在 EXL98 飞机任务期间，窄带相机观察到了精灵和蓝色喷射，这些相机测量了 4278 埃的 N-2(+) 1NG (0,1) 波段和 3370 埃的 N-2 2PG (0, 0) 波段。我们讨论了在特定精灵期间观察到的观测结果（类似于 1 公里分辨率）、仪器和大气校正以及电离 (1NG) 和中性 (2PG) 发射的高度剖面。电离发射与中性发射的比率表明 55 km 以下离子发射相对增强。特征电子能量 (E-Ch) 和电场 (E) 是使用激发速率从这些发射比导出的，该激发速率是根据将玻尔兹曼方程求解为电场函数的模型计算得出的。高达 55km 的 E 遵循击穿场 (E-k)，E-Ch 类似于 2.2eV。超过 55 公里，E 降至低于 E-k，E-Ch 降至接近 60 公里时接近 1.75eV。
[1] During the EXL98 aircraft mission, sprites and blue jets were observed by narrow band cameras that measure the N-2(+) 1NG (0,1) band at 4278Angstrom and the N-2 2PG (0, 0) band at 3370Angstrom. We discuss the observations (similar to1 km resolution), instrumental and atmospheric corrections, and altitude profiles of ionized (1NG) and neutral (2PG) emission observed during a specific sprite. The ratio of ionized-to-neutral emission indicates a relative enhancement of ion emission below 55 km. Characteristic electron energies (E-Ch) and electric fields (E) are derived from these emission ratios using excitation rates computed from a model that solves the Boltzmann equation as a function of electric field. Up to 55km E follows the breakdown field (E-k) and E-Ch is similar to2.2eV. Above 55 km E drops below E-k and E-Ch drops to similar to1.75eV near 60km.