These are at an altitude of about 500 to 2,000 km above the Earth's surface and move around the Earth quickly, completing an orbit in about 90 minutes. They are used for navigation, surveillance, and remote sensing.
These are at an altitude of about 500 to 2,000 km above the Earth's surface and move around the Earth quickly, completing an orbit in about 90 minutes. They are used for navigation, surveillance, and remote sensing.