In order for Frontex and the other members of the Hub to successfully fulfil their strategic objectives, i.e. ensuring safe and well-functioning external borders, the monitoring of new innovative technologies appears critical. In this context, High-Altitude Pseudo-Satellites (hereafter HAPS), have gained increasing attention. Indeed, these unmanned aircraft can be positioned in the stratosphere for a wide array of applications such as telecommunications, intelligent transportation systems, maritime surveillance, environmental monitoring, and la