2022年2月，意外太空天气导致38颗星链卫星重返大气层

IF 3.4 2区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS

Journal of Space Weather and Space Climate Pub Date : 2022-10-12 DOI:10.1051/swsc/2022034

R. Kataoka, D. Shiota, H. Fujiwara, H. Jin, C. Tao, H. Shinagawa, Y. Miyoshi

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引用次数: 10

摘要

38颗星链卫星的意外再入发生在2022年2月初，与中等磁暴的发生有关。人们对日冕物质抛射（CME）的结构知之甚少，导致磁暴发生在意想不到的时间。因此，更好地了解微小CME结构对于现代空间天气预报是必要的。在这次活动中，在约200公里的高度观察到空气阻力“高达50%”的增强，阻止了卫星的安全运行。尽管NRLMSIS2.0经验模型预测的质量密度增强在当前中等磁暴下小于25%，但实时GAIA模拟显示质量密度增强高达50%。此外，实时GAIA模拟表明，在200公里高度的实际热层扰动可能发生在比以前想象的更宽的区域，振幅更大。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Unexpected space weather causing the reentry of 38 Starlink satellites in February 2022

The accidental reentry of 38 Starlink satellites occurred in early February 2022, associated with the occurrence of moderate magnetic storms. A poorly understood structure of coronal mass ejections (CMEs) caused the magnetic storms at unexpected timing. Therefore, a better understanding of minor CME structures is necessary for the modern space weather forecast. During this event, the "up to 50%" enhancement of air drag force was observed at ~200 km altitude, preventing the satellites’ safety operations. Although the mass density enhancement predicted by the NRLMSIS2.0 empirical model is less than 25 % under the present moderate magnetic storms, the real-time GAIA simulation showed a mass density enhancement of up to 50%. Further, the real-time GAIA simulation suggests that the actual thermospheric disturbances at 200 km altitude may occur with larger amplitude in a broader area than previously thought.

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来源期刊

Journal of Space Weather and Space Climate ASTRONOMY & ASTROPHYSICS-GEOCHEMISTRY & GEOPHYSICS

CiteScore

6.90

自引率

6.10%

发文量

审稿时长

8 weeks

期刊介绍： The Journal of Space Weather and Space Climate (SWSC) is an international multi-disciplinary and interdisciplinary peer-reviewed open access journal which publishes papers on all aspects of space weather and space climate from a broad range of scientific and technical fields including solar physics, space plasma physics, aeronomy, planetology, radio science, geophysics, biology, medicine, astronautics, aeronautics, electrical engineering, meteorology, climatology, mathematics, economy, informatics.