A Comprehending overview of how a GPS (global positioning system) works with a set of satellites ready to provide precision status on location to base station (cell) of user. #Share the Knowledge

1. Global Positioning System

2. So, What is GPS ?
A space-based satellite
navigation system that
provides location and time
information
Its a Constellations of
24 satellites operated
by U.S Dept. of
Defence.

3. Also called NAVSTAR, the official DOD name for GPS.
All 24 satellites are divided into 6 parts.
There are 4 Satellites in each part.
A Defined orbit is given to each part.
Each of these are 3000-4000 pound Solar Powered
Satellites.

4. Structure of GPS
Space Segment
Control Segment
User Segment

5. Management & Purpose
of GPS
● It Receives Signals and determines your position in earth
Geographical Areas.
● GPS satellites circle the earth twice a day in a very
precise orbit and transmit signal information to earth.
● Generally used for, military ground, sea & air forces.

6. A GPS Operation Overview
● A Gps reciever can tell its own position by using the position data of itself, and
compares that data with 3 or more GPS satellites.
● To get distance to each Satellite , the GPS transmits a signal to each Satellite.
➢ The signal travels at a known speed.
➢ The system measures the time delay between the signal transmission and signal reception of the
GPS signal.
➢ The signal carry information about the satellites location.
➢ Determines the position of, and distance to, at least three satelites, to reduce error.
➢ The Receiver computers position using tilateration.

7. How It Works
 Basically, three satellites are needed to track a position on earth
Surface.
 Replacement satellites are always there to ensure functioning of
satellites 24 hrs.
 Determines by creating a 2D or 3D positioning.
Working Module

8. Working
1. GPS satellite transmits data that
indicates its location and the
current time.
3. All GPS satellites synchronize
operations so that these repeating signals are transmitted at the same instant.
2. That time is Subtracted by the time
received by the receiver and
distance is calculated.
4. These Signals Travels at speed of Light.
5. When the receiver estimates the distance to at least four GPS satellites, it can
calculate its position in three dimensions.

9. Defined illustration

10. Video Demonstration

11. • The GPS signals are transmitted at a power equivalent to a 50 watt
domestic light bulb.
• Signal have to pass through space and our atmosphere before reaching
your satnav after a journey of 11,500 miles.

12. How Position is Determined
• A GPS receiver "knows" the location of the satellites
because that information is included in the
transmitted data.
• Estimating how far away a satellite is,
the receiver also "knows" it
is located somewhere on the
surface of an imaginary sphere.

13.  It Depends on receiver.
 Most consumer GPS units have an accuracy of about +/-10m.
 Other types of receivers use a method called Differential
GPS (DGPS) to obtain much higher accuracy.
 DGPS requires an additional receiver fixed at a known
location nearby.

14. Asset management
Environmental & Forestry
Agriculture
Construction
Marine Military
Rescue & safety Operations
Transportation & Vehicle
Survey
Urban & Municipal
Security
Factory Automotation
Mobile resources
GIS & Mapping