What happens if a satellite is placed above a different part of Earth, not the equator?

In one line

The rule

A satellite in a geostationary orbit stays fixed above one point on the equator because it moves at the same speed as Earth's rotation.

If a satellite is not above the equator, it follows a different orbit (called an inclined orbit) and moves over different places as the Earth rotates.

Let's understand it simply

Imagine you are spinning a football on your finger. If you stick a sticker at the widest part (the equator), it goes around smoothly and always faces out. But if you put the sticker near the top (closer to the pole), it moves in a circle, but sometimes it faces you, sometimes away. Satellites work the same way. Only those above the equator can stay above one spot. Others move over different places.

How it works

1. The Earth spins fastest at the equator.
2. A geostationary satellite matches this speed and stays above one spot on the equator.
3. If you put a satellite above a different part (like Delhi or London), it cannot match the ground speed below.
4. The satellite will move north and south as it orbits, passing over different places each time.
5. This path is called an inclined or polar orbit, not geostationary.

The story behind it

Scientists wanted satellites that could always watch the same area (like for TV or weather). In 1945, Arthur C. Clarke suggested putting satellites above the equator, moving at the same speed as Earth's rotation. This idea led to geostationary satellites. But for other jobs, like mapping or spying, satellites are put in orbits that cover the whole Earth, not just the equator.

Where you see it in real life

• TV satellites (like INSAT): Placed above the equator, always above the same spot → gives steady signal.
• Weather satellites: Some are above the equator, some move over the poles → can see the whole Earth over time.
• GPS satellites: Move in inclined orbits → cover all parts of the world, not just the equator.
• ISRO’s Cartosat: Moves in a polar orbit → takes pictures of every part of India and the world.

Why it matters

• Geostationary satellites are needed for live TV, phone calls, and weather updates for one area.
• Satellites in other orbits are needed for mapping, spying, or global coverage.
• Knowing the difference helps in designing the right satellite for the job.
• Many exam questions ask about the difference between geostationary and polar orbits.

Common mistakes

• Thinking all satellites stay above one spot: Only geostationary ones do, and only above the equator.
• Believing a satellite can stay fixed above Delhi or Mumbai: Not possible, unless Delhi or Mumbai is on the equator.
• Mixing up polar and geostationary orbits: Polar orbits move over poles and cover the whole Earth; geostationary orbits stay above the equator.

Remember it

Only satellites above the equator can stay fixed over one spot—others move over different places as the Earth turns.