First results obtained by the Cluster STAFF experiment

Cornilleau‐Wehrlin, N.; Chanteur, Gérard; Perraut, S.; Rezeau, Laurence; Robert, P.; Roux, A.; Villedary, C. de; Canu, P.; Maksimović, M.; Conchy, Y. de; Hubert, D.; Lacombe, Catherine; Lefeuvre, F.; Parrot, M.; Pinçon, Jean-Louis; Décréau, Pierrette; Harvey, C. C.; Louarn, P.; Santolı́k, O.; Alleyne, H.; Roth, M.; Chust, T.; Contel, O. Le; Team, Staff

doi:10.5194/angeo-21-437-2003

Cited by 203 publications

(164 citation statements)

References 43 publications

(35 reference statements)

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“…These data can be used for spectrum analysis, spectral matrices, wave normal analysis, and Poynting flux calculations on the ground. Second, the waveforms can be analyzed in the Waves FFT Engine coprocessors to produce spectral matrices similar to those computed on the Cluster STAFF instrument (Cornilleau-Wehrlin et al 2003) which can be generalized to other instances .…”

Section: Waves Receiversmentioning

confidence: 99%

The Electric and Magnetic Field Instrument Suite and Integrated Science (EMFISIS) on RBSP

et al. 2013

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The Electric and Magnetic Field Instrument and Integrated Science (EMFISIS) investigation on the NASA Radiation Belt Storm Probes (now named the Van Allen Probes) mission provides key wave and very low frequency magnetic field measurements to understand radiation belt acceleration, loss, and transport. The key science objectives and the contribution that EMFISIS makes to providing measurements as well as theory and modeling are described. The key components of the instruments suite, both electronics and sensors, including key functional parameters, calibration, and performance, demonstrate that EMFI-SIS provides the needed measurements for the science of the RBSP mission. The EMFISIS operational modes and data products, along with online availability and data tools provide the radiation belt science community with one the most complete sets of data ever collected.

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Section: Waves Receiversmentioning

confidence: 99%

The Electric and Magnetic Field Instrument Suite and Integrated Science (EMFISIS) on RBSP

et al. 2013

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“…Magnetic field fluctuations are measured by the search coils (SC) of the STAFF experiment with 0.04 s time resolution (Cornilleau-Wehrlin et al, 2003). This instrument measures magnetic fluctuations above 0.1 Hz.…”

Section: Magnetosheath Spectrum In the Presence Of Alfvén Vorticesmentioning

confidence: 99%

Solar wind vs magnetosheath turbulence and Alfvén vortices

Alexandrova

2008

Nonlin. Processes Geophys.

106

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Abstract. In this paper we give firstly a broad review of the space plasma turbulence around the ion characteristic space and temporal scales within two natural laboratories, the solar wind and the Earth magnetosheath. In both regions power law spectra of magnetic fluctuations are observed. In both regions these spectra have a break in the vicinity of the ion cyclotron frequency. A distinctive feature of the magnetosheath turbulence is the presence of Alfvén vortices at scales of the spectral break. The Alfvén vortices are multi-scale nonlinear structures. We give a review of the main theoretical features of incompressible Alfvén vortsices in the second part of the paper. Finally, we analyze the spectral properties of the Alfvén vortex solution and of the network of such vortices. We show that the observed magnetosheath spectrum in presence of the Alfvén vortices can be described, at least partially, by the vortex network model.

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“…They addressed the location of noise with respect to the equatorial plane and the spatio-temporal structure of its frequency spectra. Santolík et al (2002) found these waves within 2 • of the magnetic equator, and Cornilleau-Wehrlin et al (2003), in another case, at about 3 • of the model equator, with an extension of 0.15 R E in the direction perpendicular to the ecliptics. Since a common feature of the equatorial noise is the presence of harmonic lines whose spacings do not match the local (a) sum of the power-spectral densities of the three magnetic components, (b) sum of the power-spectral densities of the two electric components ; (c) ellipticity and (d) planarity are determined using the singular value decomposition of the magnetic spectral matrix.…”

Section: Introductionmentioning

confidence: 99%

Systematic analysis of equatorial noise below the lower hybrid frequency

et al. 2004

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Abstract.We report results of a systematic analysis of a large number of observations of equatorial noise between the local proton cyclotron frequency and the local lower hybrid frequency. The analysis is based on the data collected by the STAFF-SA instruments on board the four Cluster spacecraft. The data set covers their first two years of measurement in the equatorial magnetosphere at radial distances between 3.9 and 5 Earth radii. Inspection of 781 perigee passages shows that the occurrence rate of equatorial noise is approximately 60%. We identify equatorial noise by selecting data with nearly linearly polarized magnetic field fluctuations. These waves are found within 10 • of the geomagnetic equator, consistent with the published past observations. Our results show that equatorial noise has the most intense magnetic field fluctuations among all the natural emissions in the given interval of frequencies and latitudes. Electric field fluctuations of equatorial noise are also more intense compared to the average of all detected waves. Equatorial noise thus can play a non-negligible role in the dynamics of the internal magnetosphere.

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First results obtained by the Cluster STAFF experiment

Cited by 203 publications

References 43 publications

The Electric and Magnetic Field Instrument Suite and Integrated Science (EMFISIS) on RBSP

The Electric and Magnetic Field Instrument Suite and Integrated Science (EMFISIS) on RBSP

Solar wind vs magnetosheath turbulence and Alfvén vortices

Systematic analysis of equatorial noise below the lower hybrid frequency

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