Why can't I find this parameter RNGFND_LANDING?

I had Bad Lidar Health error when i used PX4flow,but i can`t find the paramete RNGFND_LANDING on mission planner. Who can tell me about it? thanks

The firmware I use is 3.4.5

@Demo_Lee. Have you solved your problem??. :cold_sweat: i am facing same problem as you. if yes could you help me please

It seems that RNGFND_LANDING is only for planes, not for copter (drone) :wink:

I think you can use the RNGFNDx_ORIENT parameter. It can configure range_finder’s orientation to down(25).