Two‐dimensional velocity of the magnetic structure observed on 11 July 2017 by the Magnetospheric Multiscale spacecraft - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Geophysical Research Space Physics Année : 2021

Two‐dimensional velocity of the magnetic structure observed on 11 July 2017 by the Magnetospheric Multiscale spacecraft

Richard Denton
  • Fonction : Auteur
Roy Torbert
  • Fonction : Auteur
Hiroshi Hasegawa
  • Fonction : Auteur
Kevin Genestreti
  • Fonction : Auteur
Roberto Manuzzo
  • Fonction : Auteur
Laurence Rezeau
Francesco Califano
Rumi Nakamura
  • Fonction : Auteur
Jan Egedal
  • Fonction : Auteur
Olivier Le Contel
James Burch
  • Fonction : Auteur
Daniel Gershman
Ivan Dors
  • Fonction : Auteur
Matthew Argall
  • Fonction : Auteur
Christopher Russell
  • Fonction : Auteur
Robert Strangeway
  • Fonction : Auteur
Barbara Giles
  • Fonction : Auteur

Résumé

In order to determine particle velocities and electric field in the frame of the magnetic structure, one first needs to determine the velocity of the magnetic structure in the frame of the spacecraft observations. Here, we demonstrate two methods to determine a two-dimensional magnetic structure velocity for the magnetic reconnection event observed in the magnetotail by the Magnetospheric Multiscale (MMS) spacecraft on July 11, 2017, Spatio-Temporal Difference (STD) and the recently developed polynomial reconstruction method. Both of these methods use the magnetic field measurements; the reconstruction technique also uses the current density measured by the particle instrument. We find rough agreement between the results of our methods and with other velocity determinations previously published. We also explain a number of features of STD and show that the polynomial reconstruction technique is most likely to be valid within a distance of 2 spacecraft spacings from the centroid of the MMS spacecraft. Both of these methods are susceptible to contamination by magnetometer calibration errors.

Dates et versions

hal-03173542 , version 1 (22-03-2021)

Identifiants

Citer

Richard Denton, Roy Torbert, Hiroshi Hasegawa, Kevin Genestreti, Roberto Manuzzo, et al.. Two‐dimensional velocity of the magnetic structure observed on 11 July 2017 by the Magnetospheric Multiscale spacecraft. Journal of Geophysical Research Space Physics, 2021, 126, ⟨10.1029/2020JA028705⟩. ⟨hal-03173542⟩
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