The International Space Station orbits 400 km above the Earth’s surface. Due to the altitude, communication signals require less power and time to travel between the Earth stations and the satellites. Yes, we think about LEO as being way up there in space—and it is indeed very high. The low altitude of the Low earth orbit is apt for communication and imaging satellites. Low Earth orbit is not very high. Technically, objects in low-Earth orbit are at an altitude of between 160 to 2,000 km (99 to 1200 mi) above the Earth’s surface.
Low earth orbit is only slightly above the Earth, by outer space standards, 124 - 1240 miles (200 - 2000 km) in altitude.Below 124 miles, orbits rapidly degrade, causing surface impact, and above 1,240 miles or even less, the Earth's radiation belts damage … Also, imaging satellites can capture very detailed pictures.