GPS(Global Positioning System)

Global Positioning System : 

Global Positioning System

PRESENTED BY : 

PRESENTED BY Sukhdev kushwaha {90} Gokul poojari {102} Supreeth shetty {109}

INTRODUCTION : 

INTRODUCTION

Global Positioning Systems : 

Global Positioning Systems GPS is a revolutionary navigation system 24 satellites orbiting the earth Provide location within metres or less anywhere on the globe. Now available in many cars as an option Created and operated by the US Department of Defense

Global Positioning System (GPS) EARTH SATELLITE SYSTEM : 

Global Positioning System (GPS) EARTH SATELLITE SYSTEM

More about GPS satellites : 

More about GPS satellites Constellation of 27 satellites (24 active + 3 spare) Orbit 12,600 miles above earth (10,900 nautical miles) Satellites in 12 hour orbit First satellite launched in 1978, 24th became operational in 1994 Selective availability was removed in May, 2000 Handheld receivers are now much more accurate

How does GPS work? : 

How does GPS work?

How does GPS work? : 

How does GPS work? Measuring distance by measuring time Satellites send coded signals indicating their position in space and the exact time the signals are being sent Receivers use the time it takes signal to travel from satellite to receiver to determine distance from satellite to receiver Information from multiple satellites is used to determine position through ‘triangulation’

TRIANGULATION METHOD : 

TRIANGULATION METHOD

How to Calculate a Position : 

How to Calculate a Position Measure the Distance to the Satellites

Instruments: GPS Receiver : 

Instruments: GPS Receiver DIFFERENT TYPE OF RECEIVER

Woking of GPS receivers : 

Woking of GPS receivers A GPS receiver's job is to locate four or more satellites, figure out the distance to each, and use this information to deduce its own location. Hand-held receivers for recreational use with accuracy of 10-15 metres Vehicle mounted receivers for navigation or agricultural use with accuracy of < 1 metre Backpack or tripod mounted receivers for surveying use with accuracy of 5 – 10 centimetres

Working of GPS receivers : 

Working of GPS receivers Receivers require clear line-of-sight; thus, they will not work indoors or where tall objects obscure the sky

What’s so cool about GPS? : 

What’s so cool about GPS? GPS units Can be used as a digital compass Can be used to determine ground speed Can store landmarks (locations) Can be used for dynamic routing Can be used for mapping applications

Applications of GPS : 

Applications of GPS In-vehicle Navigation (car, boat, airplane) Construction Geologic Research & Mining Military Navigation and Operations Mapping & Surveying Precision Agriculture Public Health Public Safety Wireless Communications Asset Management

Advantages of GPS: : 

Advantages of GPS: Ease of Navigation Search Nearby Water Water Navigation Fast speed Leads u in right direction Helps improve mapping skills Has panic buttons built in You can be found easier if in danger or in accident

Disadvantages of GPS: : 

Disadvantages of GPS: Possible Failures Inaccurracy Cost Reception Direction Battery life Cellular devices can track other cellular device users Not very cheap People focus on GPS more than road=ACCIDENTS Needs good care and handling External power Needs batteries (handheld ones)

Queries ……………. : 

Queries …………….

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