How GPS Works

The Global Positioning System (GPS) is a satellite-based navigation system that allows devices to determine their location anywhere on Earth with remarkable precision. GPS is maintained by the United States government and operates through a network of satellites, ground stations, and user devices.

Here’s a detailed explanation of how GPS works

Core Components of GPS

Satellites: The GPS system consists of at least 24 operational satellites orbiting Earth at an altitude of approximately 20,200 kilometers. These satellites are distributed in six orbital planes to ensure global coverage.

Ground Stations: Ground stations monitor the satellites to ensure they stay on their intended paths and maintain accurate time synchronization.

User Devices: Devices like smartphones, GPS trackers, and navigation systems use GPS receivers to calculate their position by communicating with satellites.

The Principle of Trilateration

The fundamental concept behind GPS is trilateration, which calculates a position based on the distances from multiple satellites. Here’s how it works:

Each GPS satellite continuously broadcasts signals containing:

• The satellite’s current location.