Geo orbiter can go out to 60,000 miles (approx 100,000KM). You basically have a right triangle. Side 1= 60,000 miles side 2= 3963 miles (straight down through the earth to the equator) hypotenuse = 60,131 miles. Angle to geo obiter at 60,000 miles out = approx 86 degrees from South Pole. 90-86= 4 degrees below the horizon. The platform would have to be about 276 miles high. So I guess it’s not realistic, unless you bounce it off a polar obiter. So the biggest advantage is that you can see or destroy every polar obiter within one rotational orbit around the earth.