Outer Heliosphere and Interstellar Medium: Investigation on the Signal Fluctuations Collected by Voyager Probes

The following article analyses deep-space data recorded by the Voyager 1 and Voyager 2 probes, covering the period between January 1, 2016, and December 31, 2020. Based on the available data, the investigation aims to contribute to predicting the future trends, with the goal of identifying the positions of the probes within the Interstellar Medium. The project begins by examining the current state of the probes, including their positions and the paths they have reached. The data are contextualized through estimates of different regions of the Interstellar Medium found in the literature, based on energy conservation law calculations. Two methods of analysis are employed: the Fluctuation Theory, which examines the oscillations of variables over time, and a simple Fourier interpolation, which allows for the Fourier Transform of the signal into a function of frequency and thus, the power of the signal.