"Hey Dale,

The PX4-FLOW is an optical flow unit used for collision avoidance, if I'm not mistaken. Hobbyking has one that has the sonar module (http://www.hobbyking.com/hobbyking/store/__66308__HK_Pilot32_Optica...). Last check it was about $106 USD…"

"Hey Rodney,

Thanks for the quick reply. I know I can preprogram a route in mission planner, but can I have the pixhawk recordy control inputs or even just my flight path (x,y,z / time) so that I can save it as a mission for me to use at a later…"

"Ok, so should I ditch the Ublox GPS and go with 2 Pikis RTK GPS to get the best signal lock I can? Would creating a base station help at all? Is there a way to incorporate the compass on the Ublox GPS to help keep the rover on a straight path? Sorry…"

"Hey guys,

I'm sorry if I did not ask my question in an easy to understand manner. Let me reiterate,

Is the Pixhawk or HKPILOT32 (a hobbyking Pixhawk clone) capable of straight parallel lines on a preprogrammed route, using the Pikis RTK GPS & the…"

"Thank you Darius, I appriciate the advice, but this is more of a proof of concept type of endeavor rather than a commercial enterprise. I'm using my late father's old equipment for the ground penetrating radar, so I don't have to spend additional…"