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Title: Initial Results from the GEM Challenge on the Spacecraft Surface Charging Environment

Abstract

Spacecraft surface charging during geomagnetically disturbed times is one of the most important causes of satellite anomalies. Predicting the surface charging environment is one prevalent task of the geospace environment models. Therefore, the GEM Focus Group “Inner Magnetosphere Cross-energy/Population Interactions” initiated a community-wide challenge study to assess the capability of several inner magnetosphere ring current models in determining surface charging environment for the Van Allen Probes orbits during the March 17, 2013 storm event. The integrated electron flux between 10 and 50 keV is used as the metrics. Various skill scores are applied to quantitatively measure the modeling performance against observations. Results indicate that no model consistently perform the best in all of the skill scores or for both satellites.We find that from these simulations the ring current model with observational flux boundary condition and Weimer electric potential driver generally reproduces the most realistic flux level around the spacecraft. A simple and weaker Volland-Stern electric field is not capable of effectively transporting the same plasma at the boundary towards the Earth. On the other hand, if the ring current model solves the electric field self-consistently and obtains similar strength and pattern in the equatorial plane as the Weimer model, themore » boundary condition plays another crucial role in determining the electron flux level in the inner region. Finally, when the boundary flux spectra based on MHD model/empirical model deviate from the shape or magnitude of the observed distribution function, the simulation produces poor skill scores along RBSP orbits.« less

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [2];  [2]
  1. Beihang Univ., Beijing (China). School of Space and Environment
  2. NASA Goddard Space Flight Center, MA (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1494463
Alternate Identifier(s):
OSTI ID: 1495597
Report Number(s):
LA-UR-18-27881
Journal ID: ISSN 1542-7390
Grant/Contract Number:  
89233218CNA000001; AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Space Weather
Additional Journal Information:
Journal Volume: 17; Journal Issue: 2; Journal ID: ISSN 1542-7390
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 58 GEOSCIENCES; Heliospheric and Magnetospheric Physics

Citation Formats

Yu, Yiqun, Rastaetter, Lutz, Jordanova, Vania K., Zheng, Yihua, Engel, Miles A., Fok, Mei-Ching, and Kuznetsova, Maria. Initial Results from the GEM Challenge on the Spacecraft Surface Charging Environment. United States: N. p., 2019. Web. doi:10.1029/2018SW002031.
Yu, Yiqun, Rastaetter, Lutz, Jordanova, Vania K., Zheng, Yihua, Engel, Miles A., Fok, Mei-Ching, & Kuznetsova, Maria. Initial Results from the GEM Challenge on the Spacecraft Surface Charging Environment. United States. doi:10.1029/2018SW002031.
Yu, Yiqun, Rastaetter, Lutz, Jordanova, Vania K., Zheng, Yihua, Engel, Miles A., Fok, Mei-Ching, and Kuznetsova, Maria. Fri . "Initial Results from the GEM Challenge on the Spacecraft Surface Charging Environment". United States. doi:10.1029/2018SW002031.
@article{osti_1494463,
title = {Initial Results from the GEM Challenge on the Spacecraft Surface Charging Environment},
author = {Yu, Yiqun and Rastaetter, Lutz and Jordanova, Vania K. and Zheng, Yihua and Engel, Miles A. and Fok, Mei-Ching and Kuznetsova, Maria},
abstractNote = {Spacecraft surface charging during geomagnetically disturbed times is one of the most important causes of satellite anomalies. Predicting the surface charging environment is one prevalent task of the geospace environment models. Therefore, the GEM Focus Group “Inner Magnetosphere Cross-energy/Population Interactions” initiated a community-wide challenge study to assess the capability of several inner magnetosphere ring current models in determining surface charging environment for the Van Allen Probes orbits during the March 17, 2013 storm event. The integrated electron flux between 10 and 50 keV is used as the metrics. Various skill scores are applied to quantitatively measure the modeling performance against observations. Results indicate that no model consistently perform the best in all of the skill scores or for both satellites.We find that from these simulations the ring current model with observational flux boundary condition and Weimer electric potential driver generally reproduces the most realistic flux level around the spacecraft. A simple and weaker Volland-Stern electric field is not capable of effectively transporting the same plasma at the boundary towards the Earth. On the other hand, if the ring current model solves the electric field self-consistently and obtains similar strength and pattern in the equatorial plane as the Weimer model, the boundary condition plays another crucial role in determining the electron flux level in the inner region. Finally, when the boundary flux spectra based on MHD model/empirical model deviate from the shape or magnitude of the observed distribution function, the simulation produces poor skill scores along RBSP orbits.},
doi = {10.1029/2018SW002031},
journal = {Space Weather},
number = 2,
volume = 17,
place = {United States},
year = {2019},
month = {2}
}

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