This thesis presents the design and development of a robust low-latency on-board data handling unit for lightweight space and aerial platforms. The project was carried out as an internship at Stratobotic S.r.l., a startup based in Turin which focuses on building advanced stratospheric platforms, called CubeHAPS. High Altitude Platform Stations (HAPS) are emerging as a strategic hybrid between UAVs and satellites, offering persistent, high-resolution and high-coverage remote sensing capabilities from the stratosphere. However, the efficacy of these platforms depends heavily on the temporal integrity of the payload data. In dynamic aerial environments, standard software-based time stamping via On-Board Computers (OBC) has proven to be not precise enough, introducing variable latency and jitter, leading to significant georeferencing errors that negatively affect the end product.