Since the onset of industrial development in the eighteenth century, climate change has increasingly threatened natural ecosystems and human society, driving the urgent need for innovative, large-scale solutions to mitigate its impact. In particular, space-based geoengineering has emerged as a promising strategy, offering a global scale intervention. Among these methods, the Planetary Sunshade System, based on Solar Radiation Modification, aims to reduce the oncoming solar radiation, thereby mitigating the greenhouse effect and the rise of Earth's temperature. The main motivation behind this project lies in evaluating some of the critical technologies of a Planetary Sunshade System. In this perspective, a precursor mission demonstrator is designed.