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AGU: Geophysical Research Letters

 

Index Terms

  • Magnetospheric Physics: Plasmasphere
  • Magnetospheric Physics: Instruments and techniques
  • Magnetospheric Physics: Plasma waves and instabilities
  • Magnetospheric Physics: MHD waves and instabilities

Abstract

GEOPHYSICAL RESEARCH LETTERS, VOL. 30, 1600, 4 PP., 2003
doi:10.1029/2003GL016946

A coordinated ground-based and IMAGE satellite study of quiet-time plasmaspheric density profiles

Zoë C. Dent

Department of Physics, University of York, Heslington, York, UK

I. R. Mann

Department of Physics, University of York, Heslington, York, UK

F. W. Menk

School of Mathematical and Physical Sciences and CRC for Satellite Systems, The University of Newcastle, Newcastle, NSW, Australia

J. Goldstein

Department of Physics and Astronomy, Rice University, Texas, USA

C. R. Wilford

Space and Atmosphere Research Group, Department of Applied Mathematics, University of Sheffield, Sheffield, UK

M. A. Clilverd

British Antarctic Survey, Cambridge, UK

L. G. Ozeke

Department of Physics, University of York, Heslington, York, UK

Cold plasma mass density profiles in the plasmasphere have been determined for the geomagnetically quiet day of 19th August 2000 using the cross-phase technique applied to ground-based magnetometer data from the SAMNET, IMAGE and BGS magnetometer arrays. Cross-phase derived mass densities have been compared to electron densities derived from both ground-based VLF receiver measurements, and the IMAGE satellite RPI. The cross-phase results are in excellent agreement with both the VLF and IMAGE observational results, thus validating the cross-phase technique during quiet times. This is the first such coordinated multi-instrument study, and has enabled very few heavy ions to be inferred in the plasmasphere for L > 3.45 on this day. The observational results were compared to plasma mass densities from the SUPIM model and were found to be in excellent agreement. IMAGE EUV data also verified the existence of azimuthal structure in the outer quiet-time plasmasphere.

Received 17 January 2003; accepted 12 May 2003; published 17 June 2003.

Citation: Dent, Z. C., I. R. Mann, F. W. Menk, J. Goldstein, C. R. Wilford, M. A. Clilverd, and L. G. Ozeke (2003), A coordinated ground-based and IMAGE satellite study of quiet-time plasmaspheric density profiles, Geophys. Res. Lett., 30(12), 1600, doi:10.1029/2003GL016946.

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