Whoo-Yah. I normally don't say things like this in a post, but read my novel. Sure it's only sci-fi, but the protagonist produces gravitational fields almost exactly as described here. It is the basis of the whole book.
Just one more cognitive leap to make: They aren't measuring gravity fields, they are measuring time fields.
flame suit on...
They aren't measuring gravity fields, they are measuring time fields Sure, but time is not a field. What it is, is hard to say, but field isn't it. It's more of a function of being on the surface of a hyperdimensional sphere.