ROS2 Topic Info: /scan - RadarScan Message

The command ros2 topic info /scan provides information about a ROS2 topic named '/scan'. This specific output indicates the following:

• Type: 'radar_msgs/msg/RadarScan' - The topic publishes messages of the type 'RadarScan' defined within the 'radar_msgs' package.
• Publisher count: 1 - One node is currently publishing messages to this topic.
• Subscription count: 0 - No nodes are currently subscribing to this topic.

This means that while data is being sent on the '/scan' topic, no other node is currently receiving it. This could indicate that a component responsible for processing the radar data is either not running or is not configured to subscribe to this specific topic.