scholarly journals Maximizing the Accuracy of Double Probe Electric Field Measurements near Perigee: The Case of the Van Allen Probes Instruments

2021 ◽  
Author(s):  
Solène Lejosne ◽  
John W. Bonnell ◽  
John R. Wygant ◽  
Forrest S. Mozer
Keyword(s):  
Electric Field ◽  
Field Measurements ◽  
Double Probe ◽  
Van Allen Probes ◽  
Electric Field Measurements

Calculation of corotation electric field based on Van Allen Probes measurements

2020 ◽  
Author(s):  
Wenlong Liu ◽  
Zhao Zhang
Keyword(s):  
Magnetic Field ◽  
Electric Field ◽  
Large Scale ◽  
Rotation Period ◽  
Field Measurements ◽  
Inner Magnetosphere ◽  
Dipole Magnetic Field ◽  
Van Allen Probes ◽  
Electric Field Measurements ◽  
Euv Imaging

<p>Corotation electric field is important in the inner magnetosphere topology, which was usually calculated by assuming 24h corotation period. However, some studies suggested that plasmasphere corotation lag exists which leads to the decrease of corotation electric field. In this study, we use electric field measurements from Van Allen Probes mission from 2013 to 2017 to statistically calculate the distribution of large-scale electric field in the inner magnetosphere. A new method is subsequently developed to separate corotation electric field from convection electric field. Our research shows electric field is inversely proportional to the square of L, and, with the assumption of dipole magnetic field, the rotation period of plasmasphere is estimated as 27h, consistent to the results by Sandel et al. [2003] and Burch et al. [2004] with EUV imaging of the plasmasphere. Based on the research, a new empirical model of innermagnetospheric corotation electric field was estibalished, which is significant for a more accurate understanding the large-scale electric field in the inner magnetosphere.</p>

scholarly journals In-flight calibration of double-probe DC electric field measurements on Cluster

2014 ◽  
Vol 4 (1) ◽  
pp. 85-107
Author(s):  
Y. V. Khotyaintsev ◽  
P.-A. Lindqvist ◽  
C. M. Cully ◽  
A. I. Eriksson ◽  
M. André
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Field Measurements ◽  
Calibration Procedure ◽  
Double Probe ◽  
Ac Electric Fields ◽  
Dc Electric Field ◽  
Electric Field Measurements

Abstract. Double-probe electric field instrument with long wire booms is one of the most popular techniques for in situ measurement of DC and AC electric fields in plasmas on spinning spacecraft platforms, which have been employed on a large number of space missions. Here we present an overview of the calibration procedure used for the EFW instrument on Cluster, which involves spin fits of the data and correction of several offsets. We also describe the procedure for the offset determination and present results for the long-term evolution of the offsets.

scholarly journals In-flight calibration of double-probe electric field measurements on Cluster

2014 ◽  
Vol 3 (2) ◽  
pp. 143-151 ◽  
Author(s):  
Y. V. Khotyaintsev ◽  
P.-A. Lindqvist ◽  
C. M. Cully ◽  
A. I. Eriksson ◽  
M. André
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Field Measurements ◽  
Calibration Procedure ◽  
Double Probe ◽  
Term Evolution ◽  
Electric Field Measurements ◽  
Electric Field Instrument

Abstract. Double-probe electric field instrument with long wire booms is one of the most popular techniques for in situ measurement of electric fields in plasmas on spinning spacecraft platforms, which have been employed on a large number of space missions. Here we present an overview of the calibration procedure used for the Electric Field and Wave (EFW) instrument on Cluster, which involves spin fits of the data and correction of several offsets. We also describe the procedure for the offset determination and present results for the long-term evolution of the offsets.

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