Gnss_serial_driver_in_ROS
GNSS串口解析，转换成ROS话题输出。
rosrun uart_rtk_driver rtk_driver_node
uart_rtk_driver\config\config.yaml
uartCOM: /dev/ttyUSB1
baudrate: 115200
frame_id: /imu_link
rtk_topic: /rtk_data
rtk_yaw_topic: /rtk_yaw_data
ros自带话题：
sensor_msgs::NavSatFix
自定义话题：
uart_rtk_driver::rtk
msg文件如下：
Header header
float64 yaw
uint64 status
uint64 utctime
uint64 satelite_num