This seminar introduces the aerospace research activities at Gyeongsang National University (GNU), Republic of Korea, with particular emphasis on the research programs conducted within the Department of Aerospace Engineering and the College of Space and Aeronautics. The presentation will first provide an overview of GNU’s aerospace education and research environment, highlighting the diverse research areas pursued by faculty members. These areas include spacecraft systems engineering, space mission design, propulsion and aerodynamics, structural dynamics, autonomous and unmanned systems, and satellite navigation technologies. Through this overview, the seminar aims to present the broader research landscape and academic activities of the aerospace engineering community at GNU. The second part of the seminar will focus on research conducted in the Space and Unmanned Systems Laboratory (led by Prof. Bang), particularly in the areas of integrity-critical satellite navigation and advanced Positioning, Navigation, and Timing (PNT) technologies. Topics covered in the seminar include GNSS-based positioning and augmentation systems such as Satellite-Based Augmentation Systems (SBAS), as well as emerging architectures such as Low-Earth-Orbit (LEO) satellite-based monitoring for navigation integrity and interference detection. Finally, the seminar will discuss potential research collaboration opportunities between GNU and the LAAS laboratory, particularly in areas such as GNSS interference monitoring, distributed sensing networks, and resilient navigation systems.