Gps Jovince

8/9/2019 Gps Jovince

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Global Positioning System

By JOVINCE JOHN


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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 is theshortened form of NAVSTAR GPS.


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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


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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 fromsatellite to receiver

Information from multiple satellites is used to

determine position through triangulation


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How does GPS work?


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time difference

pseudo-random

code generated

by GPS receiveron the ground

pseudo-randomcode generated

by GPS satellite

in space

The GPS receiver and satellite generate the same pseudo-random code at

exactly the same time. When the code arrives from the satellite, the timedifference is compared to the same code generated by the receiver. This

difference is multiplied by the speed of light (186,000 miles per second) to

determine the distance to the satellite.


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More about 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


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More about GPS receivers

Receivers require clear line-of-sight; thus, they will not

work indoors or where tall objects obscure the sky


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Whats so cool about GPS?

GPS units

Can be used as a digital compass

Can store landmarks (locations)

Can be used for dynamic routing

Can be used for mapping applications


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System Overview:System Overview:

The total GPS configuration is comprised of three distinctThe total GPS configuration is comprised of three distinct

segmentssegments

(1) The space segment(1) The space segment--Satellites orbiting the EarthSatellites orbiting the Earth

(2) The control segment(2) The control segment--Stations positioned on the EarthsStations positioned on the Earths

equator to control the satellites.equator to control the satellites.

(3) The user segment(3) The user segment Anybody that receives and uses theAnybody that receives and uses the

GPS signal.GPS signal.


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Applications of GPS

In-vehicle Navigation (car, boat, airplane)

Asset Management

Construction

Geologic Research & Mining

Military Navigation and Operations

Mapping & Surveying

Precision Agriculture

Public Health

Public Safety

Wireless Communications


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Conclusion

GPS was originally designed for military use at

any time, anywhere on the surface of the earth.

The civilians may also use GPS to marine navigation,

car navigation and surveying.


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Queries .


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ThAnk yOU

Gps Jovince

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