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Wave Telescope Technique for MMS MagnetometerMultipoint measurements are a powerful method in studying wavefields in space plasmas.The wave telescope technique is tested against magnetic field fluctuations in the terrestrial magnetosheath measured by the four Magnetospheric Multiscale (MMS) spacecraft on a spatial scale of about 20 km.The dispersion relation diagram and the wave vector distribution are determined for the first time in the ion-kinetic range. Moreover, the dispersion relation diagram is determined in a proxy plasma restframe by regarding the low-frequency dispersion relation as a Doppler relation and compensating for the apparent phase velocity. Fluctuations are highly compressible, and the wave vectors have an angle of about 60 from the mean magnetic field. We interpret that the measured fluctuations represent akinetic-drift mirror mode in the magnetosheath which is dispersive and in a turbulent state accompanied by a sideband formation.
Document ID
Document Type
Reprint (Version printed in journal)
External Source(s)
Narita, Y. (Space Research Inst. Graz, Austria)
Plaschke, F. (Space Research Inst. Graz, Austria)
Nakamura, R. (Space Research Inst. Graz, Austria)
Baumjojann, W. (Space Research Inst. Graz, Austria)
Magnes, W. (Space Research Inst. Graz, Austria)
Fischer, D. (Space Research Inst. Graz, Austria)
Voros, Z. (Space Research Inst. Graz, Austria)
Torbert, R. B. (New Hampshire Univ. Durham, NH, United States)
Russell, C. T. (California Univ. Los Angeles, CA, United States)
Strangeway, R. J. (California Univ. Los Angeles, CA, United States)
Bromund, K. R. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Le, G. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kepko, E. L. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
April 11, 2017
Publication Date
May 24, 2016
Publication Information
Publication: Geophysical Research Letters
Volume: 43
Issue: 10
ISSN: 0094-8276
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Report/Patent Number
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