If matter modulates space-time then the Earth modulates space-time as it travels through it. If it does then can we send a spaceship to the location of Earths wake and measure the disturbance. How? By using laser interferometry. If we arrange a laser transmitter to shine through Earths wake and arrange a laser receiver on the other side of the wake we can detect space-time disturbances. Those disturbances can be de-modulated and then reproduced as images of Earth. The entire process hangs on whether space-time is modulated by matter and how long the disturbance lasts. What do you think?