Global Positioning System (known as GPS), which is part of navigation and tracking technology, because of its usefulness and convenience.
Thousand years ago, our ancestors had to go to pretty extreme measures to prevent them from getting lost: they erected monumental landmarks, drafted detailed maps , and they even learned to read the stars in the night sky. Twenty years ago, people still had to look at color printed map, trying to identify where they’re at, clarifying the best way to get to the destination, and probably stopping every now and then to ask for direction. However, things are much easier for us today. For less than $100, everyone can get a pocketsized gadget that will tell you exactly where you are on
Earth
at any moment. Even if I don’t have a GPS on your car, my smartphone that has navigation apps can also help me.
When talking about GPS, many people have a misconception that GPS is the little device that can track our positions and show us directions to the destination we want to get to. This thought is not completely wrong, but that little device which people call GPS is actually a GPS receiver, the one that receives radio signals from the satellites of the positioning system to track where we are. In fact, with just three seconds typing “GPS” and hitting “search” on Google, we can get the correct definition of GPS which is “a spacebased satellite navigation system that provides location and time information in all weather conditions, anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites.” This system has a total of 27 to 32 Earthorbiting satellites . The U.S. military developed and