You are working on a project to plot the course of a spy satellite. The satellite has a polar orbit (which means it passes over both of Earth's poles during each orbit), and it is outfitted with a camera carrying a wide-angle lens that can "see" strips of land up to 2100 km wide. The enemy is believed to have chosen an elevation of orbit that just guarantees complete coverage of Earth each day by these surveillance strips. You cannot avoid or block the satellite unless you know where it is. Calculate a height of the satellite's orbit above the surface of Earth.

You are working on a project to plot the course of a spy satellite. The satellite has a polar orbit (which means it passes over both of Earth's poles during each orbit), and it is outfitted with a camera carrying a wide-angle lens that can "see" strips of land up to 2100 km wide. The enemy is believed to have chosen an elevation of orbit that just guarantees complete coverage of Earth each day by these surveillance strips. You cannot avoid or block the satellite unless you know where it is. Calculate a height of the satellite's orbit above the surface of Earth.