In the future, a variety of different technologies to evade detection are employed, such as harmful sensory input that renders one incapable of perceiving the object that attempts to evade detection even if his/her eyes are looking directly at it, early experiments in light-bending, or just "Stealth aircraft, but better". New technologies are employed to counter this. What I am wondering is whether gravimetry is a potential solution for a military counter such stealth technologies.
Can a set of sensors that detect gravitational fields be used to accurately determine whether something is present in an area that is not supposed to be there? For instance, could a setup like what LIGO used, but miniaturized to be mounted on a truck-sized platform provide data such as "There's a human-sized object with a mass of around 1 ton two kilometers from here", or "multi-ton aircraft having such-and-such altitude is located 30 kilometers from here and is moving in such-and-such direction" with enough precision to guide either a conventional or nuclear missile to the location of the object, or are gravitational sensors incapable of being precise enough for this task?