Google wants to put its Project Tango handsets in orbit, but researchers from the GRASP Lab at UPenn are keeping things on the down-low with one of their already-clever quadrotors. If youll recall, Tango has a depth sensor, motion tracking camera and two Movidius vision processors to create an internal 3D map of its surroundings. That should, in theory, keep the drone aligned with pinpoint accuracy and no GPS signal.