This block samples the signal at its input and packs it into a ROS message of type std_msgs::Float64. Each time the block is run by its time domain, this message is published under a given topic name.
RosPublisherDouble pubDouble("myTopic"); // create publisher block
This block can be connected to any signal whose value has type double. 
 The time stamp of the signal is not transmitted.
 The time stamp of the signal is not transmitted.