Time-resolved statistical analysis of nonlinear electrostatic fluctuationsin the ionospheric E region

Details Time-resolved statistical analysis of nonlinear electrostatic fluctuationsin the ionospheric E region Time-resolved statistical analysis of nonlinear electrostatic fluctuationsin the ionospheric E region

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002jgra..107.1005l&link_type=abstract

Journal of Geophysical Research (Space Physics), Volume 107, Issue A1, pp. SIA 5-1, CiteID 1005, DOI 10.1029/2001JA900125

Physics

Plasma Physics

5

Space Plasma Physics: Wave/Wave Interactions, Ionosphere: Plasma Waves And Instabilities, Ionosphere: Ionospheric Irregularities, Space Plasma Physics: Waves And Instabilities

Scientific paper

Low-frequency electrostatic fluctuations detectedby the instruments on the Rocket and Scatter Experiment (ROSE) rockets inthe E region over northern Scandinavia are analyzed.It is demonstrated that the time-resolved statistical properties of the fluctuationsdeviate significantly from those associated with a Gaussian process. The characteristicsof the fluctuations are analyzed with particular attention to non-Gaussianeffects and phase-coherent mode couplings of electrostatic fluctuations. Non-Gaussianeffects are analyzed by means of the kernel estimator for probability densityfor short data segments. Short-time phase-coherent effects are analyzed andquantified by means of the squared wavelet bicoherence, which has desirablestatistical properties in the frequency regions of interest. The results arecompared with similar results from rocket data obtained over SøndreStrømfjord in Greenland. The results show a remarkable similarity,indicating that the observed phase coherence is a robust feature of the saturatedstage of the E region instabilities.

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