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Global Positioning SystemsGroup 9ICT 3002 – Human Computer InteractionThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported
Group MembersName Index NoW.A.L.T.C Weliwita 10020721M.A.T.N Manorathna 10020731B.J Lakmali 10020756D.P.P.D Pathirana 10020764S.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 ofDefense (DOD)• Satellite based navigation system• Allows to determine exact location, time and velocityunder all weather conditions and anywhere in theworld.
How it works• GPS satellites are placed on the orbit around theEarth• 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 NavigationEquations
How it works1 Distance fromsatellites needsto be known4 Correct for atmosphericand ionospheric errors3 Need to knowSatellite position2 Accurate(Atomic)Clocks arerequired
GPS Structure• Composed of GPSsatellites orbited abovethe earth.SpaceSegment• Composed of a mastercontrol station(MCS), an alternatemaster controlstation, four dedicatedground antennas andsix dedicated monitorstations.Controlsegment• Composed of GPSPrecise PositioningService and GPSStandard PositioningService.UserSegment
GPS options for mobile computing4/6/13• There are some basic options available whenchoosing a GPS receiver for mobile computingapplication.• The option we choose will depend on how we plan touse GPS in the field.
“Snap-on” GPS Receivers4/6/13• Designed to attach to the mobile computer and havea physical connection to the device.• Power for the GPS receiver is received and GPSdata is transmitted to the device through a serial porton the mobile computer.
Wireless GPS Receivers4/6/13These are designed to capture GPS data andtransmit it to a handheld computer wirelessly using aprotocol.
Wireless GPS Receivers4/6/13 Bluetooth GPS• One of the unique features of this Bluetooth GPSreceiver is that it can function as both a real-timeGPS receiver and a data logger at the same time.• This allows the GPS receiver to be usedsimultaneously for real-time applications, such asnavigation or location stamping, and loggingapplications.
Wireless GPS Receivers4/6/13 iGPS (Infrared GPS)• This is a large scale metrology solution that transformslarge production facilities into accurate metrology-enabled areas.• Within the facility, an unlimited number of handheldmeasurement probes or tracking sensors can operateconcurrently.
Serial GPS Receivers4/6/13• These receivers feature an external antenna that isplaced on the roof of the vehicle and cabled directly tothe cradle.• GPS data is available to the handheld when docked inthe cradle.• Serial GPS receivers provide cost savings when there isonly a need for GPS when the handheld computer is inthe 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 greenyardages 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 thegolf ground. Hand-held Golf GPS DeviceThis is a hand held lightweight device with atouch screen. This device offers bright andclear graphics, and a simple interfaceaccessed through the touch screen.
GPS in sports Athletes Australian company ha made a new GPS device totrainers and coaches to know their players movements It can wear on players shoulder blades This device is used in sports such as rugby, footballand 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 totrack their location. Now a days there are many uses including Share course track information withteammates Analyze statistics regarding maxspeed, 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 adplatforms like Geoware Use real-time location data (distance from the nearestretail location ) to deliver specific dynamic messages tothe user Mainly mobile campaigns in the grocery, political,healthcare, lottery and education industries useslocation information
GPS in Business Industry Location based Marketing
Advantages of GPS4/6/13• A GPS system in a mobile, car, boat, plane orhaversack make sure that we are never lost– Easy to navigate as it tells the direction for each turnswe 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 soyou can go and recover it.– Delivery companies are can track where its deliverytrucks are and can track goods at any point of time– Parents can track their children with GPS tracking aslots of children have mobile phones
Advantages of GPS4/6/13• 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 systemsand very easy to integrate into other technologies like cellphone• GPS has 100% coverage on the planet
Advantages of GPS4/6/13• Helps to search the nearby places such asrestaurants, hotels and gas stations• This system is updated frequently by the USgovernment and therefore is very advance• Best navigating system in water• GPS receivers are more durable, have a betterbattery life, do not rely on cell towers, typically havemore features, and mapping is always available
Limitations of GPS Satellite Geometry About where the satellites are located relative to eachothers. Accuracy of the position measurement depends onwhere the satellites are located from the perspective ofthe GPS receiver.
Limitations of GPS Multipath Cause by GPS signals being reflected form surfacesnear the GPS antenna. Can get an accurate measurement by the signal fromGPS satellite travel directly to the GPS antenna.
Limitations of GPS Propagation Delay and Internal Clock Errors due to atmospheric effects can also affect accuracy aswell as internal clock errors. GPS receiver is designed to make up for these effectsand will do so quite efficiently. In space, radio signals travel at the speed of light, butthey are significantly slower once they enter ouratmosphere.
Limitations of GPS Aerial damage If the aerial or the wire connecting it to the receiver isdamaged 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 sparebatteries.
Limitations of GPS Relying On Technology some people may rely on their devise too often. Use your sense, your sensibility and your knowledgecontained in the best computer of your brain instead ofthe GPS in your car. Some people may turn on their navigation systemseven 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 longerthey 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 impressionthat satellite technology can trace your where about. A GPS unit is only a receiver, capturing locationinformation and it doesnt 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 userswill 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 implementlocation-based marketing in 2013 50% of Smartphone shoppers use a GPS/mapping appto 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 GoogleMaps. So other users also can use this floor plans
Future of GPS Augmented reality & GPS There are new mobile applications like Junaio and Layarwhich provide displaying location details on exact objectstaken from smart phone camera Also there is a company called Hover who is augmenting3-D maps of urban areas
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 toshow the exact stars in your location just open the Sky Map and point it in the direction of thestar The app will show you the name of the star you arelooking at