Despite their usefulness, GPS and GNSS face challenges like signal interference and obstructions in urban environments and natural landscapes. Multi-path errors and saturation in highly built-up areas can lead to inaccuracies. Moreover, GNSS is vulnerable to intentional or unintentional interference, and continuous use can drain device batteries. Ongoing innovations, such as multi-constellation reception and augmentation systems, aim to mitigate these limitations and improve the overall performance of these systems.