SSC CHSL 2025 PYQ — Question 94

The correct answer is Option 3: Because it remains stationary relative to any location on Earth.
Explanation:
A Geostationary Satellite is an artificial satellite that orbits in perfect synchronization with the direction and speed of Earth's rotation.
Reason for Stability: These satellites are positioned at an altitude of approximately 35,786 kilometers above the Earth's surface. Their orbital period is exactly 24 hours, which is equal to the time Earth takes to complete one rotation on its axis.
Observation: Since it remains fixed directly above a single point on Earth at all times, it can continuously and accurately monitor cloud movements, atmospheric changes, and weather patterns.
Direction: Like the Earth, it moves in a West-to-East direction.
Key Features of Geostationary Satellites (From an Exam Perspective):
Orbit: It is also referred to as a 'Clarke Orbit' or 'Geosynchronous Orbit.' It is always situated directly above the Equator.
Usage: Primarily used for weather forecasting, television broadcasting, and communication purposes.
Examples: Satellites belonging to India's INSAT (Indian National Satellite System) series fall into this category.
Additional Information (Polar Satellites vs. Geostationary Satellites):
Feature | Geostationary Satellite | Polar Satellite
Altitude | Very High (approx. 36,000 km) | Low (approx. 500–800 km)
Orbital Period | 24 Hours | Approx. 100 minutes
Usage | Communication and continuous weather monitoring | Remote sensing, mapping, and surveillance
Relative Motion | Stationary relative to Earth | Moving across the Earth's surface
Important Questions for Upcoming Exams:
Question: At what altitude above the Earth's surface are geostationary satellites positioned? Answer: Approximately 36,000 kilometers.
Question: In which orbit are weather satellites placed?
Answer: Geostationary Orbit.
Question: What is the direction of rotation of a geostationary satellite?
Answer: West to East.