Determination of Absolute Plasma Electron Density and Electron Neutral Collision Frequency from Plasma Impedance Probe Measurements.

Details Determination of Absolute Plasma Electron Density and Electron Neutral Collision Frequency from Plasma Impedance Probe Measurements. Determination of Absolute Plasma Electron Density and Electron Neutral Collision Frequency from Plasma Impedance Probe Measurements.

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsa41a0262p&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SA41A-0262

Physics

2400 Ionosphere (6929), 2459 Planetary Ionospheres (5435, 5729, 6026), 6999 General Or Miscellaneous, 7894 Instruments And Techniques, 7959 Models

Scientific paper

A plasma fluid finite difference (PFFDTD) simulation of an antenna immersed in a magneto-plasma is used to determine the absolute electron density ne and the electron neutral collision frequency νen from RF impedance probe data. The Sudden Atomic layer (SAL) mission was launched as a part of the COQUI II campaign from Puerto Rico on 19th February, 1998 at 2009 LT. The impedance data analyzed here was obtained as the SAL rocket travelled through the lower sporadic sodium layer that occured between 90 to 94 km altitude. The impedance data is analyzed at 92.37 Km, 92.40 Km, 92.44 Km altitudes on the upleg and downleg. Analytical fits obtained from a cold collisional magnetoplasma model by Balmain is compared to the PFFDTD results. The Balmain fits are in reasonable agreement to the data but over predict the electron neutral collision frequency compared to the simulation fits. The values of ne obtained from the simulation are also compared to the values obtained from IRI model.Collision frequency νen values are compared with the Schunk and Nagy(2000) model values. The simulation results are found to be in close agreement with the models.

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