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\subsection{Abstract} \section*{Abstract}  Using an antenna to generate whistler waves and a magnetic field probe to measure changes in magnetic field, index of refractions, $\eta$, were measured and compared to theoretical value. A simulation was also created using exact theory to compare with measured results. The measured results were found to be $\pm (sum\_amount) $ off of the theoretical value. Measurements were taken on two different occasions with the first taking axial measurements at different frequencies, and the second taking a plane of data at a set frequency.