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Gps technology presentation
This document provides an overview of GPS technology. It discusses that GPS uses 3 segments - space, control, and user segments. The space segment consists of 32 satellites that orbit 12,000 miles above Earth and transmit timing signals. The control segment monitors the satellites and maintains the constellation. The user segment includes any GPS receiver that can receive and process signals from the satellites to determine location. It then explains how GPS uses trilateration of distances calculated from signal transmission times to pinpoint a user's position.
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Gps technology presentation
- 1. GPS Technology CS302 PRESENTATION Presentedby Abhishek B Jangid Md Syed Ahamad Nikhil Cherian Md Rahul Islam
- 2. Reference Wikipedia Documentation: http://www.nhdfl.org/library/pdf/Forest%20Protection/Introduc tion%20to%20Global%20Positioning%20System.pdf http://www.gps.gov/systems/gps/control/ GPS Technology 2
- 3. What is GPS(TheGlobal Positioning System) Technology??? provides users with positioning, navigation, and timing (PNT) services GPS Technology 3
- 4. Three Segments ofGPS Space Segment A constellation of 32 satellites(since 2012). Earlier it was 24 satellites. Satellites are located 12000 miles above from earth. 6 orbital planes inclined 55 degree with the equator. Their orbit ensures receiving a unique code signal from at least four satellites at any given time Distance is calculated each signal received at the ground Available in 24Hrs on the globe with an accuracy of 100 meters GPS Technology 4
- 5. Control Segment 16monitoring stations (10 NGA + 6 air force ) and master control station manage & monitor the constellation(Before it was only 5 stations). Basis of GPS technology is precise of time & position information. Tracts the satellites To correct the orbital and time information GPS Technology 5
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- 7. User Segment UserSegment Consists of users and their GPS receivers Users are limitless GPS Technology 7
- 8. But Why Satellites?? GPSTechnology 8
- 9. Idea!! GPS Technology 9 •Effective forthousands of miles. •Can be tracked with more accuracy.
- 10. GPS distance Trilateration(a more complex version of triangulation) to determine its position on the surface of the earth by timing signals from three satellites in the Global Positioning System. Demonstrate using 2D visualization. The 3 satellites can locate objects in their range. GPS Technology 10
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- 12. Measuring distance Theyconstantly broadcast 2 pieces of information: Location and Time Use electromagnetic waves to carry the signal. (c= 300,000 km/s) Lets say ,they have synchronised their clocks. We can use a time line to measure the respective time to reach the receiver. Then by using , t*s=d (t=time ,s=300,000 km/s ,d=distance. We can measure distance ,d. Then by using the Location provided ,we can exactly locate the place of receiver. GPS Technology 12
- 13. Measuring distance usingclock GPS Technology 13
- 14. How GPS Works! The GPS receivers first download the orbital information of all the satellites and stored it for future use Triangulation Once both satellite and position are known for at least 4 satellites, the receiver can determine a position by triangulation. GPS Technology 14
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- 16. GPS Errors Usermistakes account for most GPS errors Satellite clock errors Orbit errors Ionospheric and Tropospheric interference Multipath interference, Selective availability, No. of satellite visible, satellite geometry. GPS Technology 16
- 17. Some GPS terminology 2D Positioning There may be a substantial error in the horizontal coordinate 3D Positioning More accuracy GPS Technology 17
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