STARE: A new radar auroral backscatter experiment in northern Scandinavia
STARE: A new radar auroral backscatter experiment in northern Scandinavia
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STARE：斯堪的纳维亚北部的新雷达极光后向散射实验
DOI：
10.1029/rs013i006p01021
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发表时间：
1978
期刊：
影响因子：
1.6
通讯作者：
N. Thomson
中科院分区：
文献类型：
--
作者：
R. Greenwald;W. Weiss;E. Nielsen;N. Thomson
作为国际磁层研究(IMS)地面方案的一部分，在斯堪的纳维亚半岛北部建造了一个新的双站甚高频雷达极光实验STARE。这些站中的每一个都可以对300 000平方公里散射区内的雷达极光不规则性的强度和多普勒速度提供良好的空间和时间分辨率测量。这些散射区中大约有23万平方公里是两个雷达共有的，在这个区域内，可以比较两个雷达观测到的后向散射信号，并结合多普勒数据得出平均不规则漂移速度。漂移速度最终与电离层电场有关。本文介绍了这些雷达的工作原理和数据处理方法。我们还描述了漂移速度分析中使用的假设，并给出了一些支持其有效性的初步测量。最后，我们给出了晚间极光椭圆形两个逆流期间的凝视数据的几个例子。不规则性漂移图案与这些周期的预期电子漂移图案一致，从这些图案可以确定电离层电场的二维结构。
As part of the ground-based program for the International Magnetospheric Study (IMS), a new two-station VHF radar auroral experiment, STARE, has been constructed in northern Scandinavia. Each of these stations can provide good spatial and temporal resolution measurements of the intensity and Doppler velocity of radar auroral irregularities within a 300,000 km2 scattering region. Approximately 230,000 km2 of these scattering regions are common to both radars and within this area it is possible to compare the backscattered signals observed by the two radars and to combine the Doppler data to derive the mean irregularity drift velocity. The drift velocity can ultimately be related to the ionospheric electric field. In this paper we describe the operation of these radars and the method by which the data are processed. We also describe the assumptions used in the drift velocity analysis and present some initial measurements supporting their validity. Finally, we present several examples of the STARE data during two periods of counterstreaming currents in the late evening auroral oval. The irregularity drift patterns are consistent with the expected electron drift patterns for these periods and, from these patterns, one can determine the two-dimensional structure of the ionospheric electric field.