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CIVE2004_FULL_lect07.pdf

CIVE2004_FULL_lect07.pdf - CIVE2004A Lecture 20 Global...

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CIVE2004A Lecture 20: Global Navigation Satellite System Prof. Scott Bucking [email protected] Nov 6th, 2017 1 ©2017 S.Bucking
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Todays Topics Global Navigation Satellite System Franklin Expedition Lecture 2 ©2017 S.Bucking
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CIVE 2004 GIS, SURVEYING & GRAPHICS Faculty of Engineering Civil & Environmental Engineering INTRODUCTION TO GLOBAL NAVIGATION SATELLITE SYSTEMS (GNSS) 20 3 ©2017 S.Bucking
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CIVE 2004 - CARLETON UNIVERSITY Lecture 20: GNSS S. B UC K ING C O N T E N T S Surveying: Kavanagh: GPS1 General background (p. 195) § 7.1 • Background information about the use and implications of GNSS; • GNSS Equipment: practical information about types, choices and applications; • GNSS for surveying and mapping; • Surveying with GPS – the practical aspects of using this tech- nology in the field; • Expected errors; Benefits; • Assignment 8 explanation. 4 ©2017 S.Bucking
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CIVE 2004 - CARLETON UNIVERSITY Lecture 20: GNSS S. B UC K ING O B J E C T I V E S • Introduction to GNSS technology • GNSS advantages and disadvantages • Accuracy, errors, types of devices, coordination between devic- es • Where and how this technology can be used (and not used) • Understanding of how GNSS can be used in facility manage- ment, land survey and other engineering applications 5 ©2017 S.Bucking
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CIVE 2004 - CARLETON UNIVERSITY Lecture 20: GNSS S. B UC K ING The Global Positioning System (GPS) is a worldwide radio-navigation system formed from a constellation of 24 satellites and their ground stations. Owned, oper- ated by USA GLONASS » R adio-navigation system owned/operated for the Russian government GNSS » Generic term for all systems WHAT IS GPS ? 6 ©2017 S.Bucking
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CIVE 2004 - CARLETON UNIVERSITY Lecture 20: GNSS S. B U CK IN G GPNS The Global Positioning System (GPS) is a space-based global navigation satellite system that provides reliable location and time information in all weather and at all times and anywhere on or near the Earth there is an unob- structed line of sight to four or more GPS satellites. It is maintained by the United States government and is freely accessible by anyone with a GPS receiver. RECONAISSANCE ( REGISTER) PRELIMINARY ( CATALOGUE) LEVEL OF DETAIL OCCLUSION ONLY OUTDOORS LOW MID HIGH SKILLS LOW MID HIGH ENGAGEMENT SPEED RANGE OPERABILITY ROBUSTNESS PORTABILITY ADJUSMENT AND CORRECTIONS PRICE PRECISION Ranges from meters - cms KMS Depends on Handheld (affordable) Simple Robust Fast Very portable NAVSTAR – a constellation of satellites orbiting the Earth at an altitude of 20,200km. (Portions © 2003 Trimble Navigation Limited. All rights reserved.) GLOBAL POSITIONING & NAVIGATION SYSTEMS 7 ©2017 S.Bucking
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CIVE 2004 - CARLETON UNIVERSITY Lecture 20: GNSS S. B UC K ING ENGLISH HERITAGE CLASSIFICATION: Navigation-grade GPS Map accuracy and absolute accuracy approximately 10m. Good for finding loca- tion in relation to maps and relocating sites, but not suitable for site survey. Noto- riously bad for height information.
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