| ROS Resources: Documentation | Support | Discussion Forum | Index | Service Status | ros @ Robotics Stack Exchange |
The scan angles depend on the angle_increment and angle_min values stored into the topic (as you can see here). i.e.: if angle_increment is set to 0.1 (rad) the first range measurement is refered to angle_min + 0*0.1 , the second to angle_min + 1*0.1 rad, the third to angle_min+2*0.1 rad and so on.
In general, the angle refered to a particular range measurement is
angle = angle_min + index*angle_increment
where index is refered to the index of the vector's element containing that range measurement.
The scan angle is relative to the laser, where the laser is by definition at the frame that is defined for the driver instance. E.g., for 0 deg and 1m, there will be a point at x=1m in the laser frame.
Laser is emitted by transmitter for every 1 or 0.5 degree depending on your laser setting.
Corresponding distances were calculated using time taken by laser pulse to reflect at receiver.
Asked: 2015-04-20 05:29:10 -0600
Seen: 2,172 times
Last updated: Apr 20 '15
ROS Answers is licensed under Creative Commons Attribution 3.0 Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.
