cd ~/catkin_ws/src
git clone https://github.com/lengjiaming/gps_driver
cd ..
catkin_make
source ~/catkin_ws/devel/setup.bash
roslaunch chccgi610 chccgi610_nav.launch
roslaunch chccgi610 realtime_trajectory.launch
chccgi610_trajectory.launch
and change the path at rosbag node in launch