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You can record any ROS data you want using rosbag record: http://wiki.ros.org/rosbag/Commandline

Then you can play that data back later. While playing back recorded data, it looks basically like it did originally, so you can use any tools and utilities you want to look at and analyze the playback data. Same as you could do with the live data.

All ROS data has timestamps, I believe.

You can record any ROS data you want using rosbag record: http://wiki.ros.org/rosbag/Commandline

Then you can play that data back later. While playing back recorded data, it looks basically like it did originally, so you can use any tools and utilities you want to look at and analyze the playback data. Same as you could do with the live data.

All ROS data has timestamps, I believe. I think you get that for free with ROS. But some sensor plugins might also embed their own special timing information into the streaming data if they feel it necessary.

You can record any ROS data you want using rosbag record: record: http://wiki.ros.org/rosbag/Commandline

Then you can play that data back later. While playing back recorded data, it looks basically like it did originally, so you can use any tools and utilities you want to look at and analyze the playback data. Same as you could do with the live data.

All ROS data has timestamps, I believe. I think you get that for free with ROS. But some sensor plugins might also embed their own special timing information into the streaming data if they feel it necessary.