GPS technologies group 9

Global Positioning Systems

Group 9

ICT 3002 – Human Computer Interaction

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.

Group Members

Name Index No

W.A.L.T.C Weliwita 10020721

M.A.T.N Manorathna 10020731

B.J Lakmali 10020756

D.P.P.D Pathirana 10020764

S.L Siriwardana 10020772

Contents About GPS How GPS works GPS receiving devices Applications of GPS Advantages of GPS Limitations of GPS Future of GPS

About GPS• Also called “NAVSTAR”• Invented and released by American

Department of Defense (DOD)• Satellite based navigation system• Allows to determine exact location, time and

velocity under all weather conditions and anywhere in the world.

How it works• GPS satellites are placed on the orbit around

the Earth• Each satellite continually transmits signals.(messages included the position and the time )• Signals are received by the GPS receivers• Receivers calculate its positions by using

Navigation Equations

How it works

1 Distance from satellites needs to be known

4 Correct for atmospheric and ionospheric errors

3 Need to know Satellite position

2 Accurate (Atomic) Clocks are required

GPS Structure

•Composed of GPS satellites orbited above the earth.

Space Segment

•Composed of a master control station (MCS), an alternate master control station, four dedicated ground antennas and six dedicated monitor stations.

Control segment

•Composed of GPS Precise Positioning Service and GPS Standard Positioning Service.

User Segment

GPS options for mobile computing

4/6/13

• There are some basic options available when choosing a GPS receiver for mobile computing application.

• The option we choose will depend on how we plan to use GPS in the field.

“Snap-on” GPS Receivers

4/6/13

• Designed to attach to the mobile computer and have a physical connection to the device.

• Power for the GPS receiver is received and GPS data is transmitted to the device through a serial port on the mobile computer.

Wireless GPS Receivers

4/6/13

· These are designed to capture GPS data and transmit it to a handheld computer wirelessly using a protocol.

Wireless GPS Receivers

4/6/13

Bluetooth GPS• One of the unique features of this Bluetooth

GPS receiver is that it can function as both a real-time GPS receiver and a data logger at the same time.

• This allows the GPS receiver to be used simultaneously for real-time applications, such as navigation or location stamping, and logging applications.

Wireless GPS Receivers

4/6/13

iGPS (Infrared GPS)• This is a large scale metrology solution that

transforms large production facilities into accurate metrology-enabled areas.

• Within the facility, an unlimited number of handheld measurement probes or tracking sensors can operate concurrently.

Serial GPS Receivers

4/6/13

• These receivers feature an external antenna that is placed on the roof of the vehicle and cabled directly to the cradle.

• GPS data is available to the handheld when docked in the cradle.

• Serial GPS receivers provide cost savings when there is only a need for GPS when the handheld computer is in the vehicle.

Industries which uses GPS Land survey Marine Transportation Business industry Sports Healthcare Industry

GPS in sports Golf

Golfers use GPS devices to Determine the distances to the hole Identify hazards / disturbances to the hole Determine distance to front/middle/back of the

green yardages Provide score statistics Upload and share score statistics to the

internet

GPS in sports

Golf GPS device types GPS golf watchThis is a easy to use GPS golf watchprovides users with a graphic of the golf ground. Hand-held Golf GPS DeviceThis is a hand held lightweight device

with a touch screen. This device offers bright and clear graphics, and a simple interface accessed through the touch screen.

GPS in sports Athletes

Australian company ha made a new GPS device to trainers and coaches to know their players movements

It can wear on players shoulder blades This device is used in sports such as rugby,

football and hockey Uses of the device

Track players’ positions Analyze patterns of movements Detect collusions between players

GPS in sports

Cycling Earlier days cyclists used GPS devices just

to track their location. Now a days there are many uses including

Share course track information with teammates

Analyze statistics regarding max speed, average speed and lap times.

Monitor health of rider Provides evidences which helps in

accidents

GPS in Business Industry Location based Marketing

There are many customers who uses smart phones/ tablets to shop online.

Companies introduced  location-based mobile ad platforms like Geoware

Use real-time location data (distance from the nearest retail location ) to deliver specific dynamic messages to the user

 Mainly mobile campaigns in the grocery, political, healthcare, lottery and education industries uses location information

GPS in Business Industry Location based Marketing

Advantages of GPS

4/6/13

• A GPS system in a mobile, car, boat, plane or haversack make sure that we are never lost – Easy to navigate as it tells the direction for each

turns we take or we have to take to reach to our destination

• Can keep track of other things – GPS Tracking shows exactly where your device is

so you can go and recover it. – Delivery companies are can track where its

delivery trucks are and can track goods at any point of time

– Parents can track their children with GPS tracking as lots of children have mobile phones

Advantages of GPS

4/6/13

• GPS helps for constructional and development– Use to detect structural problems in buildings and roads

• Supports for emergency relief– To predict disasters like earthquakes

• Works in all weather - Do not need to worry of the climate

• Costs very low in comparison other navigation systems and very easy to integrate into other technologies like cell phone

• GPS has 100% coverage on the planet

Advantages of GPS

4/6/13

• Helps to search the nearby places such as restaurants, hotels and gas stations

• This system is updated frequently by the US government and therefore is very advance

• Best navigating system in water • GPS receivers are more durable, have a better

battery life, do not rely on cell towers, typically have more features, and mapping is always available

Limitations of GPS Satellite Geometry

About where the satellites are located relative to each others.

Accuracy of the position measurement depends on where the satellites are located from the perspective of the GPS receiver.

Limitations of GPS

Multipath Cause by GPS signals being reflected form

surfaces near the GPS antenna. Can get an accurate measurement by the signal

from GPS satellite travel directly to the GPS antenna.

Limitations of GPS

Propagation Delay and Internal Clock Errors due to atmospheric effects can also affect

accuracy as well as internal clock errors. GPS receiver is designed to make up for these

effects and will do so quite efficiently. In space, radio signals travel at the speed of

light, but they are significantly slower once they enter our atmosphere.

Limitations of GPS Aerial damage

If the aerial or the wire connecting it to the receiver is damaged you will not get a signal.

Should consider about Carrying at least 1 spare receiver or aerial If it is battery powered make sure have a plenty of

spare batteries.

Limitations of GPS Relying On Technology

some people may rely on their devise too often. Use your sense, your sensibility and your

knowledge contained in the best computer of your brain instead of the GPS in your car.

Some people may turn on their navigation systems even go to a more common places.

Limitations of GPS Losing Independence And Trust Issues 

This will more effect to a drivers. Companies install GPS systems in vehicles no

longer they can use them for their private reasons.

It may cause to become dissatisfied employees.

Limitations of GPS GPS info cannot be traced

Many people don’t use GPS under the false impression that satellite technology can trace your where about.

A GPS unit is only a receiver, capturing location information and it doesn't send a signal out.

GPS unit will not enable authorities to find you.

Future of GPSSome statistics, ABI Research figures predict the number of GPS

users will increase to 370 million by 2015 57 million new GPS users recorded this year. 46% of mobile phone users use location based

services 27% of companies worldwide planned to

implement location-based marketing in 2013 50% of Smartphone shoppers use a GPS/mapping

app to find a retail location

Future of GPS Indoor maps

Google has announced location based floor plans This helps to track the locations even inside a

building Users can upload pictures of their floor plans Line up the floor plan with satellite images in

Google Maps. So other users also can use this floor plans

Future of GPS Indoor maps

Future of GPS Augmented reality & GPS

There are new mobile applications like Junaio and Layar which provide displaying location details on exact objects taken from smart phone camera

Also there is a company called Hover who is augmenting 3-D maps of urban areas 

Future of GPS Augmented Reality & GPS

Future of GPS Google Sky Map

Sky map helps to find stars and planets on the night sky

The app utilizes mobile phone’s GPS and sensors to show the exact stars in your location

just open the Sky Map and point it in the direction of the star

The app will show you the name of the star you are looking at

Future of GPS Google Sky Map

References

http://en.wikipedia.org/wiki/Global_Positioning_System.html

http://www.gizmowatch.com/entry/gps-sports-innovate-a-gps-device-for-athletes/

http://espn.go.com/blog/playbook/tech/post/_/id/2328/golf-gps-devices-a-comprehensive-guide

http://bike-gps-review.toptenreviews.com/five-reasons-cyclists-need-a-bike-gps.html

http://www.digby.com/mobile-statistics/ http://www.raizlabs.com/blog/2008/03/03/augment

ed-reality-gps/ www.linkspoint.com/docs/GPS_Choices_WP.pdf

References

• http://vmt-gmbh.de/igps-industrie-messung.html?&L=1

• http://science.opposingviews.com/advantages-gps-17559.html

• http://www.mobiledevicemanager.com/device-tracking/advantages-gps-tracking/

• http://www.articlesbase.com/gps-articles/8-advantages-of-a-gps-system-215835.html

• http://www.emory.edu/BUSINESS/et/552fall2000/gps/limitations.htm

• http://www.cbc.ca/news/technology/story/2011/05/10/f-gps-technology.html

• http://www.locatacorp.com/applications-of-gps/limitations-of-gps/