Question

The term 'GPS' stands for:

• A. Geographical Positioning System
• B. Global Projection System
• C. Global Positioning Science
• D. Global Positioning System

Hint:

Do not confuse "Global" with "Geographical."
While it deals with geography, the official name is Global.
Different countries have their own versions: e.g., GLONASS (Russia), Galileo (EU), and NavIC (India).

Answer 1

The Correct Option is D

Step 1: Understanding the Question:
The question asks for the full expansion of the widely used acronym "GPS" in the context of navigation, remote sensing, and precision agriculture.
Detailed Explanation:

• Definition:
GPS stands for Global Positioning System.
It is a satellite-based radionavigation system owned by the United States government and operated by the United States Space Force.

• How it works:
The system consists of a constellation of at least $24$ satellites orbiting the Earth.
A GPS receiver on the ground (like in a smartphone or a tractor) calculates its exact position (latitude, longitude, and altitude) by timing the signals sent by four or more of these satellites.

• Components:
Space Segment: The satellites.
Control Segment: Ground stations that monitor and control satellites.
User Segment: The receivers used by individuals and industries.

• Application in Physical/Agricultural Sciences:
GPS is the foundation of "Precision Farming." It allows for grid soil sampling, variable rate fertilizer application, yield mapping, and automated tractor steering.

Step 2: Final Answer:
The correct full form of GPS is Global Positioning System.