Launch-In-SITL.md

@@ -58,11 +58,16 @@ Launch it with:
 roslaunch apm.launch
 ```
 
-## Launch Realsense Node
+## Launch Realsense Node [As required]
 ```shell
 roslaunch realsense2_camera rs_camera.launch
 ```
 
+## Launch YDLidar Node [As required]
+```shell
+roslaunch ydlidar lidar.launch
+```
+
 ## Launch ROS node
 source you setup.bash
 ```shell