To get into detail of the different Phases of this project I will start with phase 1 and add other phases as they come up.
Phase 1: So in this phase is to Prove that the Capacitance Proximity Sensor can indeed detect metal object below the ground and be light enough to put on a drone. The Drone manually controlled would be flown close to the ground with the sensor installed below the drone. The task then would be to fly it with proxies of land mines put in the ground. then rig the sensor to emit either a sound or turn on a LED or something which would then alert the drone operator which would then stop the drone. In this case, this would be a successfull test.