Wave phenomena around Mars observed by the MAVEN spacecraft

This thesis deals with processing wave data obtained by the LPW instrument onboard the MAVEN satellite spanning a time frame from 10/2014 to 10/2018. We look for an evidence of lightning existence on Mars. We assume that while an electromagnetic pulse originally generated during a lightning stroke would have a form of a vertical intense line in the frequency-time spectrogram, the subsequent dispersion during the propagation through the plasma medium would lead to a formation of a characteristic shape of so-called whistler. We further use the data obtained by the LPW instrument and by the magnetometer MAG to analyze electromagnetic wave environment in the near-Mars space. We study the intensity of electric and magnetic eld uctuations as a function of the position, frequency, solar activity, and Sun-Mars distance. Multicomponent measurements performed by the MAG instrument allow us to carry out a detailed wave analysis of selected events, i.e., to determine the polarity and propagation directions of the observed emissions. We show that all the selected events have common characteristics.