土星等离子体环境的规范模型

IF 2.9 2区 地球科学 Q2 ASTRONOMY & ASTROPHYSICS
A. Kamran, Q. Nénon, F. L. Johansson, Y. Hao, A. Sicard, E. Roussos, K. Dialynas, P. Jiggens, F. Cipriani
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引用次数: 0

摘要

我们提出了第一个基于经验的土星等离子体环境规范模型,该模型基于对所有公开可用的等离子体力矩数据集的分析,这些数据集使用卡西尼等离子体光谱仪和无线电和等离子体波科学仪器的多种技术进行观测。我们研究了等离子体矩与最小法向距离、l -壳层、磁纬度和磁地方时的变化,发现后三个参数对构造土星磁层等离子体矩的长期平均配置最有用。模型产生的模型矩包括电子和离子密度、温度和离子速度。考虑到大多数分析的等离子体数据被限制在土星磁层的赤道区域,我们还提出了一个例子,将等离子体模型扩展到更大的纬度范围,并采用与等离子体平衡相关的基于物理的外推。该模型将用于支持土星系统未来的太空任务规划和发展,因为土卫二是一个满足可居住性主要标准的行星体,已被各太空机构强调为大规模太空任务的首要目标。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

A Specification Model of Saturn's Plasma Environment

A Specification Model of Saturn's Plasma Environment

We present the first empirical-based specification model of Saturn's plasma environment based on the analysis of all publicly available plasma moment data sets derived using multiple techniques from Cassini observations made by the Cassini Plasma Spectrometer and the Radio and Plasma Wave Science instrument. We investigate the variability of the plasma moments with respect to minimum normal distance to the current sheet, L-shell, magnetic latitude, and magnetic local time, and find the latter three parameters to be the most useful to construct the long-term average configuration of plasma moments in Saturn's magnetosphere. The model moments generated by the model include electron and ion densities, temperatures and ion velocities. Given that the majority of the analyzed plasma data are constrained to the equatorial region of Saturn's magnetosphere, we also present an example of extending the plasma model to larger latitudinal ranges with a physics-based extrapolation related to plasma equilibrium. This model will be used to support future space mission planning and development for the Saturnian system, as the moon Enceladus, a planetary body that meets the major criteria for habitability, has been highlighted as a top target for large-scale space missions by various space agencies.

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来源期刊
Journal of Geophysical Research: Space Physics
Journal of Geophysical Research: Space Physics Earth and Planetary Sciences-Geophysics
CiteScore
5.30
自引率
35.70%
发文量
570
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