jump to other results. 1  1[countable] a particular attitude towards something; a way of thinking about something synonym viewpoint a global perspective Recent events seem less serious when put into an international perspective.
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 electronic equipment, necessitating special shielding. The region from 1,243 miles altitude to geostationary orbit (35,786 kilometers or 22,236 mi) is known as Medium Earth Orbit.
Let's figure out what that altitude is. The equation for orbital period is: If we plug in the length of a day for (T), and plug in G and M, we can solve for r. We get an orbital radius of 42,164 km (26,199 miles). That's how high we need to put our satellite (note: that's the distance from the center of the Earth. You might see people sometimes use the distance from the surface of the Earth, which is 35,786 km (22236 miles)).