I am an architectural grad student working on a fabrication thesis using the arducopter from 3D robotics. I am attempting to use the Xbee transmitters and receivers as a local GPS, by calculating the location within a volume with relative precision. I am thinking of using 3 transmitters mounted around the work area and one receiver mounted to the arducopter. i have been getting mixed reviews reading through other threads if this is the best way to go about this.
my goal is to have the copter able to navigate its location (x,y&z directions) in an area and be able to return to that area at a later time. Is this the best system for this goal?