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Chapter 8: Problem 9

How should a satellite be launched so that its orbit takes it over every point on the (rotating) Earth?

Short Answer

Expert verified
To ensure the satellite covers every point on the rotating Earth, it should be launched into a polar, Sun-synchronous orbit. This orbit allows the satellite to pass over all locations on the Earth as it rotates, with consistent lighting due to its Sun-synchronicity.

Step by step solution

01

Determine the best orbit

A polar orbit is the optimal path for a satellite to take in order to cover every point on a rotating Earth. A polar orbit is where the satellite orbits the Earth passing above or nearly above both poles of the planet on each revolution.
02

Understand the rotation of Earth

The Earth rotates on its axis from West to East. This rotation allows a satellite in a polar orbit to pass over all points on Earth as it continuously moves.
03

Implement Sun-synchronous orbit

For sufficient global coverage, the satellite orbit should be designed to be Sun-synchronous, meaning the satellite passes over any given point of the planet's surface at the same local mean solar time. This keeps the angle between the Earth, satellite, and Sun nearly constant, providing consistent lighting and allowing the satellite to see every point in every type of lighting over time.

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