Thanks for your advice @anasarrak!
I've built a DIY drone using PXFmini and I'm trying to control flight via ROS.
For my project, I simply need the drone to takeoff and hover in place 10 feet above the ground for a few minutes and then return back to the ground. There will be markings on the ground that the drone can see via computer vision to allow it to hover in place - without GPS. I was hoping to avoid using GPS to keep cost and weight low. The standard /takeoff ROS command requires GPS.
Do you know how this could be accomplished via RC Override or perhaps geometry_msgs/Twist? Let me know if you'd strongly recommend using GPS + standard /takeoff command instead.