## Electron Density and Electron Neutral Collision Frequency in the Ionosphere Using Plasma Impedance Probe Measurements on Sounding Rockets (2009)

Citations: | 2 - 0 self |

### BibTeX

@MISC{Patra09electrondensity,

author = {Swadesh Patra},

title = {Electron Density and Electron Neutral Collision Frequency in the Ionosphere Using Plasma Impedance Probe Measurements on Sounding Rockets},

year = {2009}

}

### OpenURL

### Abstract

The Plasma Impedance Probe (PIP) is an RF-instrument that is used to measure plasma electron density and electron neutral collision frequency. Radio Frequency probe techniques for the determination of plasma parameters are attractive especially because the RF response is not susceptible to spacecraft charging problems at frequencies above the electron plasma frequency where ion sheath effects are negligible. The work done in this thesis is presented as a compendium of two papers, the first paper dealing with PIP measurements on a sounding rocket mission and the second being a qualitative study of the effects of spacecraft aerodynamics on the impedance of antennas. Swept Impedance Probe measurements in a sporadic E-Layer observed during the Sudden Atomic Layer (SAL) sounding rocket mission are analyzed in the first paper to obtain absolute electron densities and electron neutral collision frequencies accurately. Three sets each of upleg and downleg impedance data are selected for the analysis. Initial estimates of the plasma parameters are obtained through a least mean square fit of the measured impedance data against the analytical impedance formula of Balmain. These initial parameters are used as a starting point to drive a finite difference computational model of

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