Read the following text and answer the following questions: 

Remembering where the car is parked, getting directions to a place, sharing a location in real time, or accessing the real state of traffic are everyday actions that we could not perform without the use of coordinates and the GPS system (Global Positioning System). A system based on a network of satellites that permanently send a signal. This signal can be captured by a receiver, which then knows its position at all times with respect to three dimensions, speed, trajectory, direction in relation to a planned itinerary, exact time, etc. We owe this sophisticated system to Gladis West, an American mathematician who in the 1980s laid the foundations of the mathematics underlying Global Positioning Systems. Her research is extremely useful for satellite geodesy. She has received numerous awards for her valuable contributions.  

1. Enter the coordinates provided by your teacher into your mobile phone and go to the location indicated there. There you will find information about a geolocation system that allows us to communicate in a simple way.
2. Once you have the information, read it carefully and answer the following questions:
   1. List 4 satellite navigation systems.
   2. List the 3 parts of the GPS system.
   3. In addition to real-time positioning, indicate other uses of the GPS system.