First multipoint in situ observations of electron microbursts: Initial results from the NSF FIREBIRD II mission
First multipoint in situ observations of electron microbursts: Initial results from the NSF FIREBIRD II mission
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电子微爆的首次多点原位观测：NSF FIREBIRD II 任务的初步结果
DOI：
10.1002/2016ja022485
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
M. Widholm
中科院分区：
文献类型：
--
作者：
A. Crew;H. Spence;J. Blake;D. Klumpar;B. Larsen;T. O'Brien;S. Driscoll;M. Handley;J. Legere;S. Longworth;K. Mashburn;Ehson Mosleh;Nicholas Ryhajlo;Sonya S. Smith;L. Springer;M. Widholm
我们提出了最初的双航天器观测，第一次既限制了空间尺度的大小，并提供在中等能量的电子微暴流的光谱特性。我们探索了2015年2月2日发生的单个微暴事件，使用了由美国国家科学基金会（NSF）相对论电子暴的集中调查：强度，范围和动力学（火鸟II）组成的双立方体卫星同时进行的观测。在这些微下击暴流事件中，两颗装备相同的火鸟II立方体卫星在穿越低地球轨道的电子沉淀区时，相距仅11公里。这些同时发生的微下击暴流事件在赤道上的尺度大于120公里。鉴于流行的一致和不一致的事件，我们得出结论，这是相同的数量级的空间尺度大小的电子微暴流，一个未知的属性，是至关重要的量化其整体作用，辐射带动力学。最后，我们提出的测量电子微暴流显示，沉淀往往同时发生在一个广泛的能量范围跨越200千电子伏至1兆电子伏，一种新形式的经验证据，提供了额外的见解微暴流产生机制的物理。
We present initial dual spacecraft observations that for the first time both constrain the spatial scale size and provide spectral properties at medium energies of electron microbursts. We explore individual microburst events that occurred on 2 February 2015 using simultaneous observations made by the twin CubeSats which comprise the National Science Foundation (NSF) Focused Investigations of Relativistic Electron Bursts: Intensity, Range, and Dynamics (FIREBIRD II). During these microburst events, the two identically instrumented FIREBIRD II CubeSats were separated by as little as 11 km while traversing electron precipitation regions in low‐Earth orbit. These coincident microburst events map to size scales >120 km at the equator. Given the prevalence of coincident and noncoincident events we conclude that this is of the same order of magnitude as that of the spatial scale size of electron microburst, an unknown property that is critical for quantifying their overall role in radiation belt dynamics. Finally, we present measurements of electron microbursts showing that precipitation often occurs simultaneously across a broad energy range spanning 200 keV to 1 MeV, a new form of empirical evidence that provides additional insights into the physics of microburst generation mechanisms.
用于 RBSP 相对论电子损耗的气球阵列 (BARREL)
影响因子：
10.3
作者：
Millan R
通讯作者：
Millan R