| 1 | Automatic calculation of the magnetometer zero offset using the interplanetary magnetic field based on the Wang-Pan method显示文摘The space-borne fluxgate magnetometer(FGM)requires regular in-flight calibration to obtain its zero offset.Recently,Wang GQ and Pan ZH(2021a)developed a new method for the zero offset calibration based on the properties of Alfvén waves.They found that an optimal offset line(OOL)exists in the offset cube for a pure Alfvén wave and that the zero offset can be determined by the intersection of at least two nonparallel OOLs.Because no pure Alfvén waves exist in the interplanetary magnetic field,calculation of the zero offset relies on the selection of highly Alfvénic fluctuation events.Here,we propose an automatic procedure to find highly Alfvénic fluctuations in the solar wind and calculate the zero offset.This procedure includes three parts:(1)selecting potential Alfvénic fluctuation events,(2)obtaining the OOL,and(3)determining the zero offset.We tested our automatic procedure by applying it to the magnetic field data measured by the FGM onboard the Venus Express.The tests revealed that our automatic procedure was able to achieve results as good as those determined by the Davis-Smith method.One advantage of our procedure is that the selection criteria and the process for selecting the highly Alfvénic fluctuation events are simpler.Our automatic procedure could also be applied to find fluctuation events for the Davis-Smith method. | XiaoWen Hu GuoQiang Wang ZongHao Pan | 2022 | Earth and Planetary Physics2022，6，1： | 1 |
| 2 | Ion acceleration at dipolarization fronts associated with the interchange instability in Earth's magnetotail显示文摘It has been confirmed that dipolarization fronts(DFs)are the result of the interchange instability in the Earth's magnetotail.In this paper,we use a Hall MHD model to simulate the evolution of the interchange instability that produces DFs along the leading edge.A test particle simulation is performed to study the physical phenomenon of ion acceleration at the DF.The numerical simulation indicates that almost all particles move earthward and dawnward and then drift to the tail.The DF-reflected ion population at the duskside appears earlier as a consequence of the asymmetric Hall electric field.Ions that are distributed in a dawn-dusk asymmetric semicircle behind the DF tend to be accelerated to higher energies(>13.5 keV).These high-energy particles eventually concentrate in the dawnside.Ions experience effective acceleration by the dawnward electric field,while they drift through the dawn flank at the front,toward the tail. | LU HaoYu GE YaSong SUN Chao | 2020 | Science China(Technological Sciences)2020，63，11： | 0 |
| 3 | Magnetospheric Physics in China显示文摘In the past two years,many progresses were made in Magnetospheric Physics by using the data of SuperMAG,Double Star Program,Cluster,THEMIS,RBSP,DMSP,DEMETER,NOAA,Van Allen probe,Swarm,MMS,ARTEMIS,MESSENGER,Fengyun,BeiDa etc.,or by computer simulations.This paper briefly reviews these works based on papers selected from the 248 publications from January 2018 to December 2019.The subjects covered various sub-branches of Magnetospheric Physics,including geomagnetic storm,magnetospheric substorm,magnetic reconnection,solar wind-magnetosphere-ionosphere interaction,radiation belt,ring current,whistler waves,plasmasphere,outer magnetosphere,magnetotail,planetary magnetosphere,and technique. | CAO Jinbin YANG Junying | 2020 | 空间科学学报2020，40，5： | 0 |
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