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Global Positioning System

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Global Positioning System
Global Positioning System
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Global Positioning System

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This slide was presented as a course work of Electronic Communication Sessional (EEE 356) during Level-3 Term-1, on 13th September, 2013 at DEEE Simulation Lab. of Chittagong University of Engineering & Technology (CUET).
The course was supervised by Dr. Muhammad Ahsan Ullah and Mr. Rashed Md. Murad Hasan sir.
The team members of this presentation were -
Md.Hasanul Azim, Sakib Reza, Md. Adibul Islam, Rajib Ghose, Irfan Uddin and Md. Amimul Ehsan (me).
For better understanding of the slide, it is required to watch videos of following play list.
videos link- https://www.youtube.com/playlist?list=PL6XcKesbXKlTx_HNIZbA4BEOlHhaE1ZwR

This slide was presented as a course work of Electronic Communication Sessional (EEE 356) during Level-3 Term-1, on 13th September, 2013 at DEEE Simulation Lab. of Chittagong University of Engineering & Technology (CUET).
The course was supervised by Dr. Muhammad Ahsan Ullah and Mr. Rashed Md. Murad Hasan sir.
The team members of this presentation were -
Md.Hasanul Azim, Sakib Reza, Md. Adibul Islam, Rajib Ghose, Irfan Uddin and Md. Amimul Ehsan (me).
For better understanding of the slide, it is required to watch videos of following play list.
videos link- https://www.youtube.com/playlist?list=PL6XcKesbXKlTx_HNIZbA4BEOlHhaE1ZwR

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Global Positioning System

  1. 1. Global Positioning System(GPS)Global Positioning System(GPS)
  2. 2. Course TeachersCourse Teachers Dr. Muhammad Ahsan UllahDr. Muhammad Ahsan Ullah && Mr. Rashed Md. Murad HasanMr. Rashed Md. Murad Hasan This was presented as a coursework of Electronic Communication Sessional in Level 3, Term 1. Correspondence: amimul66@gmail.com
  3. 3. PRESENTED BY Md.Hasanul Azim (1002061) Sakib Reza (1002062) Md. Adibul Islam (1002063) Rajib Ghose (1002064) Irfan Uddin (1002065) Md. Amimul Ehsan (1002066) Correspondence: amimul66@gmail.com
  4. 4. Objectives:Objectives:  To observe the GPS Module.To observe the GPS Module.  Creating waypoints by the GPS.Creating waypoints by the GPS.  To determine Elevation & Location usingTo determine Elevation & Location using the GPS.the GPS.
  5. 5. Lab Experiment RequriedLab Experiment Requried InstrumentInstrument  GARMIN eTREXGARMIN eTREX (GPS)(GPS)  Two batteriesTwo batteries
  6. 6. What is the GPS?What is the GPS?  A network of satellite that continuouslyA network of satellite that continuously transmit coded information which makes ittransmit coded information which makes it possible to precisely identify locations onpossible to precisely identify locations on earth is called a GPS.earth is called a GPS.
  7. 7. Components of the GPS SystemComponents of the GPS System GPS Space Segment Control Segment User Segment
  8. 8. Space SegmentSpace Segment  24 satellite vehicles24 satellite vehicles  Six orbital planesSix orbital planes  Inclined 55Inclined 55oo with respect towith respect to equatorequator  Orbits separated by 60Orbits separated by 60oo  20,200 km elevation20,200 km elevation above Earthabove Earth  Orbital period of 11 hr 55Orbital period of 11 hr 55 minmin  Five to eight satellitesFive to eight satellites visible from any point onvisible from any point on EarthEarth
  9. 9. Control SegmentControl Segment  Monitor stationsMonitor stations  Master control stationMaster control station Schreiber AFB, ColoradoSchreiber AFB, Colorado  Ground antennasGround antennas
  10. 10. GPS Ground Control StationsGPS Ground Control Stations
  11. 11. User segmentUser segment  GPS antennasGPS antennas  ReceiverReceiver  ProcessorsProcessors  Precise timingPrecise timing  Used byUsed by  AircraftAircraft  Ground vehiclesGround vehicles  ShipsShips  IndividualsIndividuals
  12. 12. GPS Communication and ControlGPS Communication and Control
  13. 13. How does the GPS work?How does the GPS work?
  14. 14. GPS works by receiving signals from special satellites that orbit the earth twice a day at an altitude of about 13 thousand miles. A minimum no. of 24 satellites are required for the GPS to function, but there are usually 33 satellites circulating the glob in case of ones fails. http://youtu.be/8sHDEUe1pY4
  15. 15. GPS satellites continuously emits RF signal that provides two signals of information : 1.the current time 2. where exactly about the earth the sat is at that time GPS receivers use this information to do a special calculation called triangulation http://youtu.be/HjRgfFSA-yU
  16. 16. The receivers compare the time the signal was sent from theThe receivers compare the time the signal was sent from the satellite with the time the signal was received.satellite with the time the signal was received. The difference in the time indicates the distance between theThe difference in the time indicates the distance between the receiver and the satellite.receiver and the satellite. http://youtu.be/0jrvliE3rX4
  17. 17. A GPS receiver needs to get signals from three satellites to calculate latitude and longitude. It needs the signal from 4th sat to calculate the altitude. http://youtu.be/xfzKu0a0RaA
  18. 18. According to Einstein’s theory of relativity-According to Einstein’s theory of relativity- Time dilation occurs in satellite with respectTime dilation occurs in satellite with respect to ground which is reduced by using Atomicto ground which is reduced by using Atomic Clock.Clock.
  19. 19. Atomic clock is an extremely accurate typeAtomic clock is an extremely accurate type of clock that is regulated by the vibrations ofof clock that is regulated by the vibrations of an atomic or molecular system such asan atomic or molecular system such as cesium or ammonia.cesium or ammonia. Triangulation is a process by which the location of a radio transmitter can be determined of a three dimensional point.
  20. 20. Working ProcedureWorking Procedure
  21. 21. Working Procedure:Working Procedure: Creating Waypoints Using the Map:Creating Waypoints Using the Map: To create a waypoint using the Map page:To create a waypoint using the Map page: 1. On the Map page, use the ROCKER to move the pointer to the1. On the Map page, use the ROCKER to move the pointer to the map item you want to mark.map item you want to mark. 2. Press release the ROCKER to capture the pointer location and2. Press release the ROCKER to capture the pointer location and open the information page for the map item.open the information page for the map item. 3. Select Save. If there is no information for that point, a3. Select Save. If there is no information for that point, a ““No map information at this point. Do you want to create a userNo map information at this point. Do you want to create a user waypoint here?” prompt appears. Select Yes.waypoint here?” prompt appears. Select Yes.
  22. 22. Working Procedure:Working Procedure: Marking Current Location:Marking Current Location: Press in and hold the ROCKER to mark current location forPress in and hold the ROCKER to mark current location for creating a new waypoint. There must be a valid position to markcreating a new waypoint. There must be a valid position to mark current location.current location. To mark current location the following procedure is followed:To mark current location the following procedure is followed: a.a. Press & hold the ROCKER until the Mark waypoint pagePress & hold the ROCKER until the Mark waypoint page appears. A default three digit name and symbol are assigned toappears. A default three digit name and symbol are assigned to the new waypoint.the new waypoint. b.b. To accept the waypoint with the default information, select OK.To accept the waypoint with the default information, select OK.
  23. 23. Data and CalculationData and Calculation Waypoint 1:Waypoint 1: Latitude: N22º27.770Latitude: N22º27.770΄΄ Longitude: E91º58.312Longitude: E91º58.312΄΄ Elevation: 101Elevation: 101 Waypoint 2:Waypoint 2: Latitude: N22º27.782Latitude: N22º27.782΄΄ Longitude: E91º58.310Longitude: E91º58.310΄΄ Elevation: 90Elevation: 90
  24. 24. Data and CalculationData and Calculation  Distance between two waypoint 01 & 02:Distance between two waypoint 01 & 02: Latitude: dN=0.0002ºLatitude: dN=0.0002º Longitude: dE=0.00033ºLongitude: dE=0.00033º so distance= 36.53 mso distance= 36.53 m [Lat- 1º=110.64km[Lat- 1º=110.64km Lon- 1º=107.55km]Lon- 1º=107.55km]
  25. 25. Application of GPS TechnologyApplication of GPS Technology
  26. 26. Application of GPS TechnologyApplication of GPS Technology LocationLocation NavigationNavigation TrackingTracking MappingMapping Determining a basic positionDetermining a basic position Getting from one location to anotherGetting from one location to another Creating maps of the worldCreating maps of the world Monitoring the movement of thingsMonitoring the movement of things
  27. 27.  Vehicle controlVehicle control  Driving carDriving car SurveySurvey Determination ofDetermination of  latitudelatitude  longitudelongitude  altitudealtitude Application of GPS TechnologyApplication of GPS Technology
  28. 28. Operation in Desert StormOperation in Desert Storm  GPS is widely used in the militaryGPS is widely used in the military  VehiclesVehicles  AircraftAircraft  Marine vesselsMarine vessels GPS Uses for the MilitaryGPS Uses for the Military
  29. 29. ACCURACY AND LIMITIONSACCURACY AND LIMITIONS
  30. 30. ACCURACY AND LIMITIONSACCURACY AND LIMITIONS Some factors affecting accuracy of GPSSome factors affecting accuracy of GPS Input errorsInput errors Dilution of precisionDilution of precision SD(position)= DOP*SD(position)= DOP* SD(inputs)SD(inputs) DOP can be improvedDOP can be improved by more satellites.by more satellites. Inputs improved by DGPSInputs improved by DGPS
  31. 31. ACCURACY AND LIMITIONSACCURACY AND LIMITIONS GPS signal can be reflected by objectsGPS signal can be reflected by objects before reaching to receiver.before reaching to receiver. Signal delay caused by Ionosphere andSignal delay caused by Ionosphere and TroposphereTroposphere Orbit errorsOrbit errors
  32. 32. ConclusionConclusion The technology of the GPS is allowing for hugeThe technology of the GPS is allowing for huge changes in society . The cost of receiver ischanges in society . The cost of receiver is dropping and at the same time the accuracy ofdropping and at the same time the accuracy of the system is improving.the system is improving.
  33. 33. THANK YOUTHANK YOU

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