GPS presentation on recent technology.pptx

Gps technology

1. www.studymafia.org Submitted To: Submitted By: www.studymafia.org www.studymafia.org Seminar On Global Positioning System

2. Content INTRODUCTION WHY DO WE NEED GPS? G. P. S. BASICS HOW DOES THE GPS WORK? PARTS OF A GPS SYSTEM GPS APPLICATIONS GPS - COMPONENTS AND BASIC FACTS GPS POSITIONING TYPES GPS SETUP BLOCK DIAGRAM FACTORS THAT AFFECT GPS CONCLUSION REFRENCES

3. INTRODUCTION ( GPS) technology is a great boon to anyone who has the need to navigate either great or small distances . The Global Positioning System (GPS) is a burgeoning technology, which provides unequalled accuracy and flexibility of positioning for navigation, surveying and GIS data capture.

4. WHY DO WE NEED GPS? Trying to figure out where you are is probable man’s oldest pastime. Finally US Dept of Defense decided to form a worldwide positioning system. Also known as NAVSTAR ( Navigation Satellite Timing and Ranging Global positioning system) provides instantaneous position, velocity and time information.

5. G. P. S. BASICS In relation to a well-defined coordinate system, usually by three coordinate values and In relation to other point, taking one point as the origin of a local coordinate system.

6. HOW DOES THE GPS WORK? Requirements Triangulation from satellite Distance measurement through travel time of radio signals Very accurate timing required To measure distance the location of the satellite should also be known Finally delays have to be corrected

7. PARTS OF A GPS SYSTEM

8. GPS APPLICATIONS Surveying and Mapping   Navigation Remote Sensing and GIS   Geodesy Military

9. GPS - COMPONENTS AND BASIC FACTS Triangulation from the satellite is the basis of the system. To triangulate, the GPS measures the distance using the travel time of the radio message. To measure travel time, the GPS need a very accurate clock. Once the distance to a satellite is known, then we need to know where the satellite is in space. As the GPS signal travels through the ionosphere and the earth's atmosphere, the signal is delayed .

10. GPS POSITIONING TYPES   Absolute Positioning Differential Positioning

11. GPS SETUP BLOCK DIAGRAM

12. FACTORS THAT AFFECT GPS Number of satellites - minimum number required Multipath - reflection of GPS signals near the antennae Ionosphere - change in the travel time of the signal Troposphere - change in the travel time of the signal   Satellite Geometry - general distribution of the satellites   Satellite Health - Availability of Signal Signal Strength - Quality of Signal Distance from the Reference Receiver Radio Frequency (RF) Interference   Loss of Radio Transmission from Base

13. CONCLUSION Barring significant new complications due to S/A (Selective Availability) from DOD, the GPS industry is likely to continue to develop in the civilian community . There are currently more than 50 manufacturers of GPS receivers, with the trend continuing to be towards smaller, less expensive, and more easily operated devices.

14. REFERENCES www.google.com www.wikipedia.com www.studymafia.org

15. Thanks