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Statistical analysis of one Chinese sun-synchronous satellite anomalies

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Science China(Technological Sciences) 2016年第4期59卷 540-546页

作者： TIAN Tian zong qiugang CHANG Zheng WANG YongFu YANG XiaoHua Institute of Space Physics and Applied Technology Peking UniversityBeijing 100871China Mailbox 5111 Beijing 100094China Center for Space Science and Applied Research Chinese Academy of SciencesBeijing 100190China

Based on the data from the Medium-Energy Proton and Electron Detector(MEPED)onboard NOAA-17,141 anomalies of a Chinese Sun-Synchronous satellite(SSO-X)that occurred between 02/01/2010 and 09/31/2012 were studied *** 26 out of the 52 anomalies that occurred outside the South Atlantic Anomaly(SAA)were accompanied by energetic electron *** Epoch Analysis(SEA)was used to analyze the properties of the anomalies and the dynamics of the space environments during these 26 ***,a Monte Carlo method was utilized to simulate the electron deposition and the interactions of the injected electrons with an aluminum shield and polyethylene *** average,median,and75th percentile values of the maximum electric field strength inside the dielectric were *** results showed the following.(1)SSO-X anomalies are more likely to occur within the SAA,as 89 out of 141 anomalies(63%)occurred there.(2)Twenty-six of the anomalies that occurred outside the SAA during energetic electron storms were located near the outer boundaries of the outer radiation belts,and these were more frequent in the Southern Hemisphere than in the Northern Hemisphere.(3)Electron flux enhancements occurred around the failure time at all energy levels but were more profound in the lower energy *** maximum fluxes of electrons>30 ke V,>100 ke V,and>300 ke V were 106,3.5×10~5,and 1.2×10~6cm^(-2) s^(-1)sr^(-1),respectively.(4)The average,median,and 75th percentile values of the maximum electric field strengths inside the dielectric for the aforementioned 26 events remained in the range from 10~6 to 10~7 V/m for long time periods,which suggests that the‘potential hazards’of internal discharges cause SSO-X *** above results can provide useful information for the design and protection of sun-synchronous spacecraft.

关键词：太阳同步卫星统计分析异常中国电子探测器蒙特卡罗方法高能电子百分位值

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子午工程二期宽频地磁波监测仪研制

地球与行星物理论评（中英文） 2024年第1期55卷 6-14页

作者：于向前和冬华肖池阶宗秋刚施伟红刘斯陈鸿飞王永福邹鸿北京大学地球与空间科学学院北京100871 北京大学物理学院北京100871 长沙理工大学物理与电子科学学院长沙410114

地球的磁层中存在各种波现象,其频率从mHz延伸到数千Hz.这些波的研究一直是空间物理学研究的核心问题.针对目前世界上地磁台站的波监测设备均为各自测量相对变化、缺乏统一标定、无法进行从高纬到低纬联合观测、无法进行多台设备观测数... 详细信息

地球的磁层中存在各种波现象,其频率从mHz延伸到数千Hz.这些波的研究一直是空间物理学研究的核心问题.针对目前世界上地磁台站的波监测设备均为各自测量相对变化、缺乏统一标定、无法进行从高纬到低纬联合观测、无法进行多台设备观测数据的统一对比研究的现状,本文综合使用磁阻传感器(探测ULF频段:1 mHz~2 Hz)、巨磁感抗传感器(探测ELF频段:0.2 Hz~2 kHz)和线圈传感器(探测VLF频段:0.2 kHz~10 kHz)研制新一代的宽频地磁波监测仪,将这些监测仪放置在120°E子午链附近的黑龙江漠河站(高纬)、北京十三陵站(中纬)、海南乐东站(低纬)等典型区域的地磁台站上,并对各个台站的设备进行统一的时间、振幅和频率标定,结合FY-3E、SMILE等近地空间卫星数据,全面提升对地球磁层的各种波现象的探测能力.研制的宽频地磁波监测仪的性能测试实验表明,其具有对一定频率(1 mHz~10 kHz)的波的探测能力;其幅度探测范围为:±65000 nT(ULF频段)、±1000 nT(ELF频段)、±100 pT(VLF频段);在量程范围内又具有较低的非线性误差:ULF频段≤0.0446%、ELF频段≤0.51%、VLF频段≤1.18%;噪声水平也较低:RMS(方均根)噪声≤0.5554 nT(ULF频段)、NPS(功率谱)噪声≤0.028 nT/√Hz(ELF频段)、NPS(功率谱)噪声≤0.24 pT/√Hz(VLF频段).所有这些特点使得所提出的宽频地磁波监测仪能够满足子午工程二期的波探测需求.

关键词：子午工程二期宽频地磁波监测仪磁阻传感器巨磁感抗传感器线圈传感器

An analysis of the correlation between the fluxes of high-energy electrons and low-middle-energy electrons in the magnetosphere

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Science China(Technological Sciences) 2016年第7期59卷 1130-1136页

作者： LI ChenFang ZOU Hong zong qiugang JIA XiangHong CHEN HongFei SHI WeiHong YU XiangQian Institute of Space Physics and Applied Technology School of Earth and Space Science Peking University State Key Laboratory of Space Medicine Fundamentals and Application Chinese Astronaut Research and Training Center

The variation of the flux of energetic electrons in the magnetosphere has been proven to be strongly related to the solar wind speed. Observations of GEO orbit show that the flux of low-energy electrons is not only modulated by the solar wind speed, but, if a time delay is added, is also positively correlated to the flux of high-energy electrons. This feature provides a possible method to forecast the flux of high-energy electrons in GEO orbit. In this study, the correlations of the fluxes between the high-energy electrons and low-middle-energy electrons obtained at different L values and in different orbits are investigated to develop the application of this feature. Based on the analysis of long–term data observed by NOAA POES and GOES, the correlations between the fluxes of high-energy electrons and low–middle–energy electrons are good enough at different L values and in different orbits in quiet time, but this correlation is strongly affected by CME–driven geomagnetic storms.

关键词：中能电子高能量相关性分析通量磁层地球轨道高能电子速度调制

Anti-proton contamination design of the imaging energetic electron spectrometer based on Geant4 simulation

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Science China(Technological Sciences) 2015年第8期58卷 1385-1391页

作者： LUO Lin ZOU Hong zong qiugang WANG LingHua CHEN HongFei SHI WeiHong YU XiangQian Institute of Space Physics and Applied Technology School of Earth and Space SciencePeking University

The measurement of energetic particles plays an important role in the space environment monitoring and space weather *** accuracy of the energetic electron measurement is seriously influenced by the proton *** anti-proton contamination design for the sensor of imaging energetic electron spectrometer is introduced in this *** to the electron and proton spectrum on the typical satellite orbits calculated by the radiation belt models,the efficiency of the anti-proton contamination design is estimated by the Geant4 simulation and the design is optimized based on the simulation results.

关键词： Geant4 成像光谱仪高能电子设计效率反质子污染模拟空间天气预报

Analysis of magnetotail flux rope events by ARTEMIS observations

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Science China(Technological Sciences) 2014年第5期57卷 1010-1019页

作者： TIAN AnMin SHI QuanQi zong qiugang DU Jian FU SuiYan DAI YaNan School of Space Science and Physics Shandong University at Weihai State Key Laboratory of space weather Chinese Academy of Sciences Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment Institute of space physics and Applied Technology Peking University

Three earthward flowing magnetic flux ropes observed in the duskside plasma sheet at geocentric solar magnetospheric coordinate X~–55 Re by P1 and P2 of acceleration,reconnection,turbulence and electrodynamics of moon’s interaction with the sun mission during 13:00–15:00 UT on July 3,2012,were *** morphologies of the flux ropes were studied in detail based on Grad-Shfranov reconstruction method and electronic pitch angle distribution *** is found that(1)the flux rope cross-sectional dimensions are 1.0 Re×0.78 Re,1.3 Re×0.78 Re,and 2.5 Re×1.25 Re,*** magnetic field lines were asymmetric about the center with field line compression on both sides of the current sheet at the leading region;(2)the electron energy flux data presented asymmetry with larger electron flux and lower temperature in the precursor *** flux ropes were blocked by the resistance of compressed particle density in the front central plasma sheet and the enhanced magnetic field on its sides;and(3)it is found that the flux rope has a layered *** inside out,event 1 can be divided into three regions,namely electronic depletion core region,closed field line region,and the caudal area possible with fields connected with the *** suggests that the flux ropes cannot merge with the tail magnetic field lines near the lunar ***,the flux rope asymmetrical shape reflects the different reconnection processes that caused it on both sides of the magnetic *** events shown in this paper support the multiple X-line magnetic reconnection model for flux ropes with in situ observations.

关键词：观测分析 ARTEMIS 磁通量等离子体片磁尾不对称性连接过程月球轨道

Ultra low frequency waves observed by Double Star TC-1 in the plasmasphere boundary layer

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Science China(Technological Sciences) 2008年第10期51卷 1685-1694页

作者： XIE Lun ZHANG XiaoJia PU ZuYin WANG YongFu FU SuiYan zong qiugang Department of Geophysics Peking UniversityBeijing 100871China

The characteristic and properties of ULF waves in the plasmasphere boundary layer during two very quiet periods are present. The ULF waves were detected by Double Star TC-1 when the spacecraft passed through the plasmasphere in an outbound and inbound trajectories, respectively. A clear association between the ULF waves and periodic variations of energetic ions fluxes was observed. The ob-servations showed that the wave frequency was higher inside the plasmasphere than outside. The mechanism generating these ULF waves and possible diagnos-ing of the "classical plasmapause" location with the ULF wave were discussed.

关键词： ULF wave PBL plasmasphere plasmapause DSP TC-1

Ultralow frequency wave characteristics extracted from particle data:Application of IGSO observations

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Science China(Technological Sciences) 2017年第3期60卷 419-424页

作者： LI Li ZHOU XuZhi zong qiugang CHEN XingRan ZOU Hong REN Jie HAO YiXin ZHANG XianGuo Institute of Space Physics and Applied Technology Peking University College of Astronautics Nanjing University of Aeronautics and Astronautics State Key Laboratory of Space Weather National Space Science CenterChinese Academy of Sciences

3 Summary and discussion In the generalized drift resonance theory[17],a characteristic signature of the ULF wave-particle interactions is the increasingly-tilted stripes in the particle energy *** phase difference ac... 详细信息

关键词：粒子能谱数据提取低频波应用观测粒子相互作用共振理论广义位移

Multi-spacecraft observations of ULF waves during the recovery phase of magnetic storm on October 30, 2003

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Science China(Technological Sciences) 2008年第10期51卷 1772-1785页

作者： YongFu Wang SuiYan Fu qiugang zong Biao Yang ZuYin Pu Lun Xie XuZhi Zhou Institute of Space Physics and Applied Technology Peking University Beijing 100871 China Center for Atmospheric Research University of Massachusetts Lowell Lowell MA 01854-3629 USA

Based on observations obtained by Cluster C1, GOES 10, 12, and Polar, the global ULF wave properties are studied during the recovery phase of a very intense magnetic storm-Halloween storm (October 31, 2003, 21:00-23:00 UT). The results indicate that the ULF waves’ properties observed by different satellites, such as amplitude, period, etc. show large variations. This can be interpreted as that Field Line Resonance (FLR) might take place in the region where Cluster C1 passed. The compressional wave of the cavity mode coupled with FLR’s shear Alfven wave and fed energy to the latter, forming a large-amplitude toroidal mode. From the point of period, Cluster C1 observed the shortest period, GOES 10, 12 observed the middle, while Polar observed the longest. The wave period of toroidal mode observed by Cluster C1 kept almost unchanging when Cluster C1 passed L range from 11.7 to 5.3. Using the Squared Wavelet Coherence analysis method, we estimated that the FLR region in the dayside magnetosphere could expand to at least 4 local time widths. The toroidal mode observed by Polar was a standing wave, while the pol-oidal mode was a propagating wave, the observation results could be well ex-plained by the waveguide mode theory. Since the solarwind speed Vx was -800 km/s and the dynamic pressure varied little, we speculated that the source of the ULF wave was the Kelvin-Helmholtz instability at the magnetopause triggered by high speed solarwind.

关键词： magnetic storm ULF wave poloidal mode toroidal mode compressional mode cavity mode Field Line Resonance (FLR)

Multi-satellite observations on the storm-time enhancements of energetic outer zone electron fluxes driven by chorus waves

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Science China(Technological Sciences) 2011年第8期54卷 2209-2216页

作者： HE ZhaoGuo XIAO FuLiang zong qiugang WANG YongFu CHEN LiangXu YUE Chao ZHANG Sai School of Physics and Electronic Sciences Changsha University of Science and Technology Changsha 410004 China Institute of Space Physics and Applied Technology Peking University Beijing 100871 China

The evolution of energetic outer zone electron fluxes during the strong magnetic storm on September 28, 2002 is investigated based on the observations of SAMPEX and GOES-10 satellites. The observations of both satellites showed that energetic electron fluxes increased significantly during the storm recovery phase, and reached the maximum on October 6. The 1.5–14 MeV and 2.5–14 MeV electron fluxes observed by SAMPEX peaked around L=3.5 with values of 6×10 2 cm -2 s -1 sr -1 keV -1 and 5×10 3 cm -2 s -1 sr -1 keV -1 , which were about 10 and 8 times the pre-storm values. At the geostationary orbit, the >0.6 MeV and >2 MeV electron fluxes observed by GOES-10 showed enhancement up to 50 and 30 times. The plasma parameters and whistler-mode chorus waves in the outer radiation belt are also analyzed based on the data from Cluster C3 satellite. Cluster C3 satellite went through the outer radiation belt twice from 1 October to 4 October, and observed whistler-mode chorus waves with high intensity (10 -5 –10 -4 nT 2 Hz -1 ). Numerical calculations indicated that the observed chorus waves were in gyro-resonance with the radiation belt electrons. The current observations and calculations provide new evidence for that the gyro-resonance with chorus waves contribute significantly to the buildup of energetic outer zone electron fluxes during storms.

关键词：卫星观测高能电子通量外区活力电子回旋共振 Cluster 驱动