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GPS ( Global Positioning System )

Written By: 

Nikhil Agnihotri

 

Long before Global Positioning System (GPS) arrived, researchers worked hard to arrive at a feasible solution to aid travellers from getting lost. Earlier, travellers used to rely on elaborate maps to track and monitor the route to their destination. But today, GPS technology has ensured hassle – free trips and increased safety for vehicle owners. The figure below illustrates a GPS satellite in orbit.

Introduction

GPS technology became a reality through the efforts of the American military, which established a satellite-based navigation system consisting of a network of 24 satellites orbiting the earth. GPS is also known as the NAVSTAR (Navigation System for Timing and Ranging).
 
GPS works all across the world and in all weather conditions, thus helping users track locations, objects, and even individuals! GPS technology can be used by any person if they have a GPS receiver.
 

Applications

This technique was initially developed for military applications. During 1980, the government decided to make it available for the civilian use as well. GPS has become an efficient tool in the field of scientific use, commerce, surveillance and tracking. GPS is used except in locations where it is difficult to detect the signal for example, underwater, subterranean location, inside the building and caves.
 
Civilian Applications
·         Navigation – Used by navigators for orientation and precise velocity measurements.
·        Geotagging – Map overlays can be created by applying location coordinates to photographs and other kind of documents.
·         Surveying – Surveyors create maps and verify the boundaries of the property.
·         Map-making – Used by civilians and military cartographers.
·         Tectonics – Detect the direct false motion measurement in earthquakes.
·        Geofencing – Vehicle, person or pet can be detected by using GPS vehicle tracking system, person tracking systems, and pet tracking systems.
 
Military Applications
·         Navigation – Soldiers can find objectives in the dark and unknown regions with the help of GPS.
·         Search and Rescue – Knowing the position of a downed pilot, its location can be traced out easily.
·         Reconnaissance – Patrol movement can be handled.
·         Target tracking – Military weapon systems use GPS to track air targets and potential ground before they are flagged as hostile.
·       GPS carry a set of nuclear detonation detectors (such as optical sensor, dosimeter, electromagnetic pulse sensor, X-ray sensor) which is a part of United States Nuclear Detonation Detection System.
·         Missile and projectile guidance – Targets military weapons such as cruise missiles, precision – guided munitions.
Structure of GPS
The GPS system comprises of three parts: Space segment, User segment and Control segment. The diagram of the structure of GPS is given below.
·           Space segment – The satellites are the heart of the Global positioning system which helps to locate the position by broadcasting the signal used by the receiver. The signals are blocked when they travel through buildings, mountains, and people. To calculate the position, the signals of four satellites should be locked. You need to keep moving around to get clear reception.
 
·           User segment – This segment includes military and civilian users. It comprises of a sensitive receiver which can detect signals (power of the signal to be less than a quadrillionth power of a light bulb) and a computer to convert the data into useful information. GPS receiver helps to locate your own position but disallows you being tracked by someone else.
 
·           Control segment – This helps the entire system to work efficiently. It is essential that the transmission signals have to be updated and the satellites should be kept in their appropriate orbits.

Comments

 nice one.

 thnx lot!..

Thnx man , nice work :p

very nice lot info. grab...

this is very useful for all...

thanks a  lot.it's so useful

 You are doing a great job guys. Just 4wd.

i want to get circuit diagram and all required details about this gps project

thanks

Excellent work. I will feature it in my site

g8 job!!!

 

nice one & intresting

really good..

 

sir i want to do the project on controlling the electrical home appliences by using gsm.

 

pls help in that.

can you plz give me the pcb+  ckt diagram of gps transmitter and receiver or completely assembly of it.

my id  are: s_chauhan_s@yahoo.co.in

way a lot of information.....

 

good!!

very informative thanx

 

what is the name of this GPS modul??

Very Nice

Wow]]>www........God]]> dammmm... This s enough man.... 

thank you......its really got a good stuff

 

     I want sample code ....not the bullshit

Everyone knows what's GPS 

 

upload all info.. and ciruit diagram and coding and components

upload all info.. and ciruit diagram and coding and components

 

very nice

tank you

I am Btech final year student doing a project on vehicle tracking using gsm and gps receiver. I am having problems in the program code for extracting the NMEA data from the string to get the location. I am using PIC 18f26k22 microcontroller. please help.......

 

nice

 

very good

Thanks for all the info.... Its awesome!!!!!!!!!

need more about practical applications ofGPS

need more about practical applications ofGPS

need more about practical applications ofGPS

need more about practical applications ofGPS

thanks a lot

hii

 

How about the heart of the GPS

 

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