GPS: Never EVER Lost!

By: a 4th grader 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 GPS does.  Next, I will cover the invention of the 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 is a device that uses satellites to tell you where you are and how far you have gone.  It can measure your distance in feet or meters.  It is only a little bit bigger than a cell phone. It uses a 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 GPS was invented by the army and for the army. It was invented in the early 1900’s. they invented it because they kept getting lost.

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. 

There are 27 satellites. 24 in use and 3 in case one fails. They use a math called trilateration. 

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 a GPS is and what a GPS does.  Always remember the invention of the GPS and the GPS satellites.

 Thanks a lot for taking the time to read my report.