PRIDE: the Planetary Radio Interferometry and Doppler Experiment (Duev et al. 2012) is an initiative by the Joint Institute for VLBI ERIC (JIVE) providing ultraprecise estimates of spacecraft state vectors (spatial coordinates and velocities) as a function of time, utilizing phase-referenced Very Long Baseline Interferometry (VLBI) tracking and radial Doppler measurements. This method is applicable to any radioemitting spacecraft, and the results can be used in a plethora of disciplines from planetary science to high-precision celestial mechanics, gravimetry and fundamental physics. This Thesis includes an overview of the scheduling procedure for a future PRIDE observation of two active spacecraft in Mars’ orbit, involving the European VLBI Network (EVN) and Very Long Baseline Array (VLBA) telescopes, as well as a demonstration of the data processing pipeline for a PRIDE experiment performed with the Mars Express orbiter in 2013. The resulting observables are applied to a radio occultation study of the Martian atmosphere, yielding vertical refractivity, density, pressure and temperature parameters. Furthermore, future opportunities for PRIDE are investigated in terms of a potential bistatic radar experiment with ESA’s JUpiter Icy moons Explorer (JUICE) mission, enabling a study of the surface of the Jovian moon Europa, as well as applications to the Lander Radioscience (LaRa) experiment which is designed to study the geological composition of Mars’ interior. The quality of the Doppler data from the single European VLBI Network (EVN) antennas is comparable to closed-loop Doppler data obtained by dedicated deep space tracking systems like NASA’s Deep Space Network and ESA’s Estrack (Bocanegra-Bahamón et al. 2018), proving that PRIDE data could enhance the science return of missions not initially designed for radio science experiments.