![[Hybrid Navigation System: Part 6] [Implementation-Phase 2] Intermediate Correction: OpenCV/YOLO Terrain Matching and Digital Twin Testing](https://quad-drone-lab.co.kr/wp-content/uploads/2026/06/Absolute_Visual_Localization_for_UAVs-768x429.jpg)
Hello! To all the graduate students and researchers burning the midnight oil at the forefront of autonomous unmanned aerial vehicle (UAV) systems—welcome back to the QUAD Drone Lab. In Part 5, we explored PX4’s Dead-Reckoning mode, a critical software safety net that allows a drone to survive and maintain flight in GNSS-Denied environments, such as…
![[Hybrid Navigation System: Special Edition] Survive GPS Jamming! A Complete Guide to “PX4 Dead-Reckoning Mode”](https://quad-drone-lab.co.kr/wp-content/uploads/2026/05/Resilient_Drone_Dead-Reckoning_Navigation-768x429.jpg)
Hello! To all the graduate students and researchers burning the midnight oil at the forefront of autonomous unmanned aerial vehicle (UAV) systems—welcome to the QUAD Drone Lab. Throughout our series, we have built various hardware and software architectures—such as high-performance external INS, ROS 2 communication bridges, terrain contour matching, and visual servoing—designed to help our…
![[Hybrid Navigation System Series Part 5: Implementation-Stage 1] Cruising Phase: Classical Dead Reckoning, Wind Estimation, and Gazebo Wind Simulation](https://quad-drone-lab.co.kr/wp-content/uploads/2026/05/Drone-Vector-Navigation-Crab-Angle-768x429.png)
Hello to all the graduate students and researchers burning the midnight oil at the forefront of autonomous unmanned aerial vehicle (UAV) systems! Welcome back to QUAD Drone Lab. In our previous post, <Part 4>, we successfully completed the infrastructure work by building a ROS 2 & Micro XRCE-DDS bridge to inject high-performance external INS data…
![[Hybrid Navigation System: Part 3 Hardware & Modeling] A Deep Dive into Industrial High-Performance INS & Making GPS Jamming Simulator](https://quad-drone-lab.co.kr/wp-content/uploads/2026/04/Physics-of-IMU-Drift-Errors-768x429.jpg)
Hello! To all the university students and researchers pushing the boundaries of autonomous flight and unmanned navigation technologies—welcome back to QUAD Drone Lab. In our previous post, <Part 2>, we explored the state estimation principles of the PX4 EKF2 (the brain of our drone) and set up a safe Gazebo SITL simulator environment for testing….
![[Hybrid Navigation System Series Part 1: Overview] Flying Hundreds of Kilometers Without GPS? Learning a Hybrid Navigation System from WWII Pilots](https://quad-drone-lab.co.kr/wp-content/uploads/2026/04/컴패니언-컴퓨터-기반의-AI-지형지물-보정-768x419.jpg)
Hello, university students and drone researchers who are diving into the world of autonomous flight and navigation systems! The drones we use every day can locate themselves as quickly and accurately as our smartphones. This is all thanks to the Global Navigation Satellite System (GNSS, commonly referred to as GPS). However, in modern, complex battlefields…
