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\section{Data Analysis}  The measurements have been plotted figures 3 through 5. Figure 3 shows waves launched 1.2 $\mu$s after being triggered. First waves are seen propagating towards density minimum, where the duct is located. The limit at which the wave will propagate towards the density maximum is when \[\omega \geq \frac{\omega_{ce}}{2}\]  where $\omega_{ce} = \frac{qB}{m_e}$. Solving for the magnetic field and plugging in frequency $f = 2\pi\omega$: \[B_{max}=\frac{4\pi m_e f}{q}\]   Plugging in $f$ = 110 MHz, $B_{max}$ = 78.6 Gauss.  Looking at figure 2, the magnetic field meaurements next to the source (position 2) were measured to be 79.4 Gauss. The limit at which the wave will propagate towards the density maximum is when \[\omega \geq \frac{\omega_{ce}}{2}\] Gauss,  because the magnetic field was higher than critical magnetic field for 110 MHz. After certain amount of time, wave fronts travel towards density maximum, presumably after entering region of lower magnetic field where $\omega$ > $\frac{\omega_{ce}}{2}$. Plotting magnetic field magnitudes for x and y, as shown in figure 5, it can be seen that the plasma is right-  hand elliptically polarized. This would suggest that the wave front is not necessarily travelling parallel to the field lines, but is moving at an angle, which can be seen in figures 2 and 3.