Before revision:  The paper describes the main hardware and software components for UAV and UGV platforms. It also presents the main algorithmic components of the system: a 3D LIDAR-based mapping and localization module able to work in GPS-denied scenarios;
After revision:  The paper describes the main hardware and software components for UAV and UGVplatforms and also present the main algorithmic components of the system: a 3D LIDAR-based mapping and localization module able to work in GPS-denied scenarios;