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Ann. Geophys., 17, 1513-1520, 1999
www.ann-geophys.net/17/1513/1999/
© European Geosciences Union 1999

EDI electron time-of-flight measurements on Equator-S

G. Paschmann¹, N. Sckopke¹, H. Vaith¹, J. M. Quinn², O. H. Bauer¹, W. Baumjohann¹, W. Fillius³, G. Haerendel¹, S. S. Kerr³, C. A. Kletzing⁴, K. Lynch², C. E. McIlwain³, R. B. Torbert², and E. C. Whipple^5
1Max-Planck-Institut für extraterrestrische Physik, D-87545 Garching, Germany
²University of New Hampshire, Durham, NH 03824, USA
³University of California at San Diego, La Jolla, CA 92093, USA
⁴University of Iowa, Iowa City, IA 52242, USA
⁵University of Washington, Seattle, WA 98195, USA

Abstract. We present the first electron time-of-flight measurements obtained with the Electron Drift Instrument (EDI) on Equator-S. These measurements are made possible by amplitude-modulation and coding of the emitted electron beams and correlation with the signal from the returning electrons. The purpose of the time-of-flight measurements is twofold. First, they provide the drift velocity, and thus the electric field, when the distance the electrons drift in a gyro period becomes sufficiently large. Second, they provide the gyro time of the electrons emitted by the instrument, and thus the magnitude of the ambient magnetic field, allowing in-flight calibration of the flux-gate magnetometer with high precision. Results of both applications are discussed.

Key words. Magnetospheric physics (electric fields; plasma convection; instruments and techniques)

Full Article (PDF, 189 KB)

Citation: Paschmann, G., Sckopke, N., Vaith, H., Quinn, J. M., Bauer, O. H., Baumjohann, W., Fillius, W., Haerendel, G., Kerr, S. S., Kletzing, C. A., Lynch, K., McIlwain, C. E., Torbert, R. B., and Whipple, E. C.: EDI electron time-of-flight measurements on Equator-S, Ann. Geophys., 17, 1513-1520, 1999.   Bibtex   EndNote   Reference Manager