This method could also be used to find GRAVITY WAVES.........................Easily........................
The search for gravity waves has been going on for a long time. When I was assigned to Air Force Office of Scientific Research, back in the 1960s, we were supporting the work of a gravity wave researcher at University of Maryland. One day I visited his lab. I saw that he had an auto license plate attached to the outside of his instrument. He remarked that it was the only licensed gravity wave detector in Maryland.