Unambiguous evidence of HF pump‐enhanced airglow at auroral latitudes
Unambiguous evidence of HF pump‐enhanced airglow at auroral latitudes
复制标题
极光纬度高频泵增强气辉的明确证据
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
Masaki Ejiri
中科院分区：
文献类型：
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作者：
B. U. E. Brändström;T. Leyser;A. Steen;M. Rietveld;B. Gustavsson;T. Aso;Masaki Ejiri
由属于极光大型成像系统(ALIS)的多达三个微光成像站同时进行的观测首次提供了在极光纬度发生高频泵浦增强气辉的强有力证据。从挪威特罗莫斯附近的EISCAT加热设施发射的4.04 MHz普通电磁波增强了气辉，有效辐射功率(ERP)约为210 mW。虽然经常在中低纬度地区观测到，尽管有许多早期的实验，但在极光地区还没有关于泵浦增强气辉的明确观测报告。1999年2月16日，首次获得了成功的结果，本文集中讨论了这一事件的光学数据。还给出了增强气辉的高度和位置的三角估计。对高频泵浦增强的气辉进行极光纬度观测对于更好地理解潜在的激发机制是重要的。
Simultaneous observations by up to three low‐light imaging stations belonging to the Auroral Large Imaging System (ALIS) have provided the first strong evidence of high‐frequency (HF) pump‐enhanced airglow at auroral latitudes. The airglow was enhanced by an ordinary mode 4.04 MHz electromagnetic wave with an effective radiated power (ERP) of about 210 MW that was transmitted from the EISCAT‐Heating facility near Tromsø, Norway. While often observed at low or mid‐latitudes, and despite numerous earlier experiments, no unambiguous observations of pump‐enhanced airglow have been reported at auroral latitudes. On February 16, 1999, the first successful results were obtained, and this paper concentrates on discussing optical data from this event. Triangulated estimations of the altitude and position of the enhanced airglow are also presented. Auroral‐latitude observations of HF pump‐enhanced airglow are important in order to better understand the underlying excitation mechanisms.