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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >A Study of the Solar Wind Ion and Electron Measurements From the Magnetospheric Multiscale Mission's Fast Plasma Investigation
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A Study of the Solar Wind Ion and Electron Measurements From the Magnetospheric Multiscale Mission's Fast Plasma Investigation

机译：太阳风离子和电子的研究从磁性层的多尺度测量任务的快速等离子调查

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摘要

We compare plasma measurements in the solar wind between the Magnetospheric MultiScale Mission's (MMS) Fast Plasma Investigation (FPI) and those obtained near the Earth-Sun L1 Lagrangian point from OMNI. FPI is an instrument designed to investigate plasma processes such as magnetic reconnection, acceleration, and turbulence. Since 2017, MMS supports solar wind campaigns where the plasma can have a higher Mach number, a cooler temperature, and a narrower beam compared with the MMS primary regions of interest. With FPI's firmware now optimized for these campaigns, the comparison with OMNI aids the interpretation of solar wind measurements. From these comparisons, we can make suggestions for both fast and burst-survey telemetry modes. From fast mode intervals, we find first, that the FPI ion density can be lower than the OMNI proton density. However, the FPI electron density agrees well with the OMNI proton density. Second, due to the solar wind's cooler proton temperature and narrow-angle, the FPI ion temperature is overestimated. Thus, using the OMNI proton temperature is suggested for plasma parameters such as thEe ion β, the ratio of ion thermal to magnetic pressure. Third, the FPI ion velocity is well-estimated when compared with the OMNI proton velocity. In burst mode, the ion density and temperature have similar characteristics but to a lesser degree. Spin effects observed in all these plasma moments in burst mode intervals are reduced with the methods discussed in this paper. The results are summarized in a table that includes linear fit parameters and their defined errors.
机译：我们比较在太阳风等离子体测量磁性层的多尺度之间的任务的(MMS)快(FPI)和等离子体调查获得在L1日地拉格朗日点附近从泛光灯。研究等离子体过程,如磁重新连接、加速度和动荡。2017年,MMS支持太阳风活动的地方等离子体可以有更高的马赫数,冷却器温度和窄光束相比感兴趣的MMS的主要地区。固件现在为这些活动,优化与OMNI艾滋病的解释太阳风测量。我们可以快速和提出建议burst-survey遥测模式。间隔,我们发现第一、FPI离子质子密度可以低于泛光灯密度。OMNI质子密度。太阳风质子冷却器温度和窄角,FPI离子温度高估了。温度是等离子体参数的建议如你离子β,离子热的比率磁压力。well-estimated OMNI质子相比速度。但温度也有类似的特征较小的程度。等离子体时刻突发模态区间减少了与本文中讨论的方法。表中的结果进行了总结包括线性参数及其定义错误。

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