Understanding The Basics Of GPS
Below is a MRR and PLR article in category Product Reviews -> subcategory Consumer Electronics.
Understanding the Basics of GPS
Overview
Discover the fundamentals of GPS, including its history, evolution, and how the technology operates today.
A Brief History of GPS
The Global Positioning System (GPS) has been a staple for nearly two decades, composed of 27 satellites in medium Earth orbit, located approximately 22,000 miles (35,000 kilometers) above the Earth's surface. The first experimental satellite was launched in 1972, but it wasn't until 1995 that GPS became a fully operational satellite tracking system, initially restricted to military and airline use.
In 1996, the system's potential for civilian applications was realized when President Bill Clinton extended its access beyond military use. However, early civilian GPS was plagued by reliability issues. Improvements came with additional civilian signals in 1998 and 2004, enhancing service quality and making GPS a viable market technology. Since 2004, there has been a surge in GPS demand, with ongoing growth potential.
How GPS Technology Works
GPS relies on its 27 satellites, ensuring that at least four are accessible to any GPS receiver at any given time worldwide. A receiver needs a minimum of four satellite connections to calculate precise location data. More connections result in greater accuracy.
To triangulate a position, a GPS receiver measures the time it takes for a satellite's signal to reach it, using this data to calculate distances to the satellites. The receiver’s mapping software then uses this information to pinpoint an exact location on Earth.
Signal degradation, caused by both natural and man-made obstructions, can affect accuracy. Thus, GPS units strive to connect with as many satellites as possible to enhance precision.
Applications of GPS
The core purpose of GPS?"accurate location pinpointing?"has remained unchanged over the past 30 years. The technology is primarily used for tracking and navigation.
The growth in GPS technology stems from improved signal quality, reduced component costs, enhanced mapping software, bundled services, and sophisticated marketing targeting a wider audience. Today, GPS devices range from large systems in airplanes to compact units in cars, motorcycles, smartphones, and PDAs. They're even embedded in freight for theft protection. The miniaturization of GPS technology has broadened its applications, limited only by imagination.
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