Electric Field Measurement on the Akebono (EXOS-D) Satellite

Electric field detectors (EFD) on the EXOS-D (Akebono) satellite measure the vector electric field by both the standard double probe technique (EFD-P) and the newly developed ion beam technique (EFD-B). The EFD-P system has been proven to generate high quality data owing to its antenna alignment whi...

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Published inJournal of geomagnetism and geoelectricity Vol. 42; no. 4; pp. 371 - 384
Main Authors HAYAKAWA, H., OKADA, T., EJIRI, M., KADOKURA, A., KOHNO, Y.-I., MAEZAWA, K., MACHIDA, S., MATSUOKA, A., MUKAI, T., NAKAMURA, M., NISHIDA, A., OBARA, T., TANAKA, Y., MOZER, F. S., HAERENDEL, G., TSURUDA, K.
Format Journal Article
LanguageEnglish
Published Tokyo Society of Geomagnetism and Earth, Planetary and Space Sciences 1990
Terra
Subjects
Earth, ocean, space
Exact sciences and technology
External geophysics
Instrumentation for aeronomy and magnetospheric studies
Wire antenna
Artificial satellite
Electric field
Detector
Instruments
Measurement result
On board apparatus
Plasmasphere
Auroral zone
Magnetosphere
Vector field
Polar ionosphere
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Summary:Electric field detectors (EFD) on the EXOS-D (Akebono) satellite measure the vector electric field by both the standard double probe technique (EFD-P) and the newly developed ion beam technique (EFD-B). The EFD-P system has been proven to generate high quality data owing to its antenna alignment which is perpendicular to the sun-earth direction at any phase of the satellite spin. The EFD-B system has not yet been fully operated and is ready for a suitable orbital phase for beam experiments. This paper describes the instrumentation and preliminary observed results obtained by the EFD-P such as the Langmuir characteristics of the probe in the plasmasphere and the convection electric field in the auroral ionosphere. An intense electric field has been observed between the region 1 and 2 current on the morning side. Close to the mid-day meridian, fluctuating electric fields that are likely to be related in terms of a cusp/cleft structure were observed.
ISSN:0022-1392
2185-5765
DOI:10.5636/jgg.42.371