High-resolution maps of the characteristic energy of precipitating auroral particles
High-resolution maps of the characteristic energy of precipitating auroral particles
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DOI：
10.1029/2001ja900107
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发表时间：
2001-12-01
影响因子：
2.8
通讯作者：
Hagfors, T
中科院分区：
文献类型：
--
作者：
Kosch, MJ;Honary, F;Hagfors, T
我们首次在斯堪的纳维亚半岛北部极光带的地面仪器上绘制了沉降电子特征能量的高分辨率地图。这是通过结合来自数字全天成像仪（DASI）的557.7 nm强度校准光学数据和来自电离层研究成像Riometer （IRIS）的极光吸收图像来完成的。能量图在240 X 240 kin的公共地理区域内以高时间（10秒）和空间（10公里）分辨率制作。IRIS和DASI在其共同视场内都有欧洲非相干散射（EISCAT）雷达。EISCAT能够精确测量电子密度高度分布，在大气模型的帮助下，将其转化为沉淀电子通量的等效能谱。然而，非相干散射雷达通常具有非常小的视场(
For the first time we produce high-resolution maps of the characteristic energy of precipitating electrons from ground-based instrumentation in the auroral zone over northern Scandinavia. This is done by combining intensity-calibrated optical data at 557.7 nm from the Digital All-Sky Imager (DASI) with auroral absorption images from the Imaging Riometer for Ionospheric Studies (IRIS). Energy maps are produced with high temporal (10 s) and spatial (10 km) resolution within a common geographic area of 240 X 240 kin. Both IRIS and DASI have the European Incoherent Scatter (EISCAT) radar within their common field of view. EISCAT is capable of making accurate measurements of the electron density height profile which, with the assistance of an atmospheric model, are inverted into equivalent energy spectra of the flux of precipitating electrons. However, incoherent scatter radars generally have a very small field of view (