Leddar-evaluation-kitWe can use Optinal Flow board to help us determine the height and speed.
Prior to using the device above, we need to understand how Optical Flow works in the most basic level. Hence, we use PX4Flow to do so.
To see the progess we have made to understand PX4, you can click here.
We have this LIDAR for long distance range finder.
http://leddartech.com/leddar-evaluation-kit/
http://leddartech.com/app/uploads/dlm_uploads/2016/02/Datasheet-Leddar-Sensor-Evaluation-Kit.pdf