GPS: Never EVER Lost!

By a 4th grade student and Mr. Welch


Have you ever been lost?  Imagine you are hiking or sailing and you suddenly realize, you don’t know where in the world you are!  Your heart begins to pound.  Your forehead begins to sweat.  Then you smile and pull out your handy GPS.

My report will cover three interesting ideas.  First, I will write about what GPS is and what it does.  Next, I will cover the invention of GPS.  Finally, I will end with the GPS satellites.  So, keep reading and let’s begin this journey about GPS.

What GPS is and what GPS does

This paragraph is about what GPS is and what GPS does.  A GPS tells where you are, or where you have gone. It can measure your distance in feet or meters. Some are only the size of a cell phone. They also use a fancy math called trilateration.

Marshall Brain said that a GPS receiver can help you find where you are, anywhere on earth, as long as you have a clear enough view of the sky. If your GPS receiver can get signals from 3 or more satellites, it can figure out where you are by doing some fancy math called trilateration.

The Invention of the GPS

This paragraph is about the invention of the GPS. 

The army for the army invented GPS. It was invented in the 1970’s. It became fully operational in 1995.  Allison K. Brown said that in the early 1970's, the military began developing GPS. It became fully operational in 1995. (World Book Encyclopedia)

The GPS Satellites

This paragraph is about the GPS Satellites.  The GPS satellites weigh about 3000 to 4000 pounds. There are 27 GPS satellites but three are extras in case one fails. The GPS satellites cost way more than GPS receivers.  Marshall Brain taught that, the Global Positioning System (GPS) is actually a constellation of 27 Earth-orbiting satellites (24 in operation and three extras in case one fails). (


In conclusion, if you never want to be scared by getting lost, be sure to have a GPS.  I hope you enjoyed learning about GPS.  I know I enjoyed learning about what GPS is and what it does.  Always remember the invention of GPS and the GPS satellites.  Thanks a lot for taking the time to read my report.