STEREO database of interplanetary Langmuir electric waveforms

Abstract : This paper describes a database of electric waveforms that is available at the Centre de Données de la Physique des Plasmas (CDPP, http://cdpp.eu/). This database is specifically dedicated to waveforms of Langmuir/Z-mode waves. These waves occur in numerous kinetic processes involving electrons in space plasmas. Statistical analysis from a large data set of such waves is then of interest, e.g., to study the relaxation of high-velocity electron beams generated at interplanetary shock fronts, in current sheets and magnetic reconnection region, the transfer of energy between high and low frequencies, the generation of electromagnetic waves. The Langmuir waveforms were recorded by the Time Domain Sampler (TDS) of the WAVES radio instrument on board the STEREO mission. In this paper, we detail the criteria used to identify the Langmuir/Z-mode waves among the whole set of waveforms of the STEREO spacecraft. A database covering the November 2006 to August 2014 period is provided. It includes electric waveforms expressed in the normalized frame inline image with B and Vsw the local magnetic field and solar wind velocity vectors, and the local magnetic field in the variance frame, in an interval of ±1.5 min around the time of the Langmuir event. Quicklooks are also provided that display the three components of the electric waveforms together with the spectrum of E∥, together with the magnitude and components of the magnetic field in the 3 min interval, in the variance frame. Finally, the distribution of the Langmuir/Z-mode waves peak amplitude is also analyzed.
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Journal of Geophysical Research : Space Physics, American Geophysical Union/Wiley, 2016, 121 (2), pp.1062-1070. 〈10.1002/2015JA022036〉
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Carine Briand, Pierre Henri, V. Génot, N. Lormant, N. Dufourg, et al.. STEREO database of interplanetary Langmuir electric waveforms. Journal of Geophysical Research : Space Physics, American Geophysical Union/Wiley, 2016, 121 (2), pp.1062-1070. 〈10.1002/2015JA022036〉. 〈hal-01311872〉

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