Abstract

A method is proposed for the study of the height–time characteristics of physical processes in the region of auroral electron acceleration. Auroral kilometer radiation, which is generated at the local electron gyrofrequency, can be used to obtain the height distribution of the properties of a radiation source in the auroral region, and long-term satellite measurements of the auroral kilometric radiation allows the evolution of these features to be tracked over time. This approach to the analysis of auroral kilometric radiation makes it possible to obtain data remotely on variations in the features of its source concurrently along the magnetic field line of the acceleration region. This approach has been used here to analyze the auroral kilometric radiation recorded on the INTERBALL-2 satellite within the POLRAD experiment. The analysis has revealed a regular change in the wavelet spectra of fluctuations in the auroral kilometric radiation along the magnetic field line. In the given frequency range with an almost constant radiation intensity, the fluctuation spectrum follows a power law at high altitudes and becomes uniform over all characteristic times at low altitudes. This spectral transformation indicates that the processes in the source of auroral kilometric radiation are nonlinear.

中文翻译：

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极光辐射监测电子加速区

摘要

提出了一种方法用于研究极光电子加速度区域中物理过程的高度-时间特征。局部电子陀螺频率产生的极光公里辐射可用于获得极光区域中辐射源特性的高度分布，并且长期对极光公里辐射进行卫星测量可允许这些特征的演变随着时间的推移进行跟踪。这种分析极光公里辐射的方法使得可以沿着加速区域的磁力线同时远程获取其源特征变化的数据。此方法已在此处用于分析POLRAD实验中INTERBALL-2卫星上记录的极光公里辐射。分析表明，极光公里辐射的波动的小波谱沿磁场线有规律的变化。在给定的频率范围内，具有几乎恒定的辐射强度，波动频谱在高海拔地区遵循幂律，在低海拔地区的所有特征时间内均变得均匀。这种光谱变换表明，极光公里辐射源中的过程是非线性的。