A satellite's orbital period depends on its orbital radius (altitude above Earth's centre), following Kepler's third law. Low Earth Orbit (LEO) satellites, including most polar-orbiting Earth observation satellites, orbit at altitudes of a few hundred kilometres and complete an orbit in roughly 90–100 minutes.
A satellite orbiting at about 700 km altitude is in Low Earth Orbit, only slightly above the minimum practical altitude for satellites (a few hundred...
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