INTRODUCTION TO ENGINEERING SURVEYING (CE 1305)

Size: px
Start display at page:

Download "INTRODUCTION TO ENGINEERING SURVEYING (CE 1305)"

Transcription

1 INTRODUCTION TO ENGINEERING SURVEYING (CE 1305) Coordinate Systems Sr Dr. Tan Liat Choon Mobile:

2 NATIONAL COORDINATE REFERENCE SYSTEM There are 2 types of coordinate systems: Geographic Coordinate Systems Projected Coordinate Systems 2

3 GEOGRAPHIC COORDINATE SYSTEM A reference system using latitude and longitude to define the location of points on the surface of a sphere or spheroid decimal degrees (DD) degrees/minutes/seconds (DMS) W 3

4 GEOGRAPHIC COORDINATE SYSTEM - Earth is not a sphere - Poles are flattened - Bulges at equator Earth is a spheroid or ellipsoid 4

5 GEOGRAPHIC COORDINATE SYSTEM Spheroid approximates the shape of the earth Model of the earth Essentially when surveyors get together and all agree to be wrong Also called an ellipsoid 5

6 GEOGRAPHIC COORDINATE SYSTEM A datum defines the position of the spheroid relative to the center of the earth Origin and orientation of latitude and longitude lines are determined by the datum Hundreds of datum customized for different parts of the world 6

7 GEOGRAPHIC COORDINATE SYSTEM Universal Coordinate System (latitude/longitude) Latitude/longitude good for locating positions on surface of a globe Latitude/longitude is not efficient for measuring distances and areas! Latitude and longitude are not uniform units of measure One degree of longitude at equator = km (Clarke 1866 spheroid) One degree of longitude at 60 latitude = km (Clarke 1866 spheroid) 7

8 COMMON DATUMS USED IN U.S. North American Datum 1927 (NAD27) Uses the Clarke 1866 spheroid Reference point is located at Meades Ranch, Kansas Based on ground survey inrmation in the 1800 s North American Datum 1983 (NAD83) Uses GRS80 (Geodetic Reference System) spheroid Ellipsoid model from geocentric perspective Based on ground surveys and satellite information WGS 1984 Most recently developed datum/ framework for measurements worldwide Earth centered, or geocentric, perspective This is the datum used by all GPS satellites 8

9 COMMON DATUMS USED IN MALAYSIA GDM2000 or Geodetic Datum of Malaysia 2000 and Cassini-Soldner are coordinate systems commonly used in the Peninsular Malaysia States of Johor, Negeri Sembilan, Melaka, Pahang, Selangor, Terengganu, Penang/Seberang Perai, Kedah, Perlis, Perak and Kelantan. 9

10 PROJECTED COORDINATE SYSTEMS A map projection is the systematic transformation of locations on the earth (latitude/longitude) to planar coordinates The basis for this transformation is the geographic coordinate system (which references a datum) Map projections are designed for specific purposes 10

11 PROJECTED COORDINATE SYSTEMS Use projection to display 3 dimensional locations on to a surface in 2D Uses Cartesian coordinates (rectangular) 11

12 INTRODUCTION TO GLOBAL POSITIONING SYSTEM (GPS) Satellite-based navigation system Network of 24 satellites placed into orbit by the U.S. Department of Defense (DoD) GPS was developed and is operated by the U.S. DoD. Originally called NAVSTAR (Navigation System with Timing and Ranging). Before its civilian applications, GPS was originally intended for military applications to provide allweather round-the-clock navigation capabilities for military ground, sea, and air forces 1980s, system available for civilian use 12

13 INTRODUCTION TO GLOBAL POSITIONING SYSTEM (GPS) GPS works in any weather conditions, anywhere in the world, 24 hours a day. No subscription fees or setup charges to use GPS Applications navigation, location determination Used for cartography, forestry, mineral exploration, wildlife habitation management, monitoring the movement of people and things and bringing precise timing to the world 13

14 INTRODUCTION TO GLOBAL POSITIONING SYSTEM (GPS) A worldwide MEO satellite navigational system formed by 24 satellites orbiting the earth and their corresponding receivers on the earth Orbit the earth at approximately 12,000 miles above the surface and make two complete orbits every 24 hours Continuously transmit digital radio signals that contain data on the satellites location and the exact time to the earth-bound receivers Equipped with atomic clocks within a billionth of a second precision. Based on this information the receivers know how long it takes for the signal to reach the receiver on earth 14

15 INTRODUCTION TO GLOBAL POSITIONING SYSTEM (GPS) As each signal travels at the speed of light, the longer it takes the receiver to get the signal, the farther away the satellite is. By knowing how far away a satellite is, the receiver knows that it is located somewhere on the surface of an imaginary sphere centred at the satellite By using three satellites, GPS can calculate the longitude and latitude of the receiver based on where the three spheres intersect By using four satellites, GPS can also determine altitude 15

16 INTRODUCTION TO GLOBAL POSITIONING SYSTEM (GPS) MEO, medium or middle earth orbit, a satellite system used in telecommunications MEO satellites orbit the earth between 1,000 and 22,300 miles above the earth's surface MEOs are mainly used in geographical positioning systems and are not stationary in relation to the rotation of the earth 16

17 ELEMENTS OF GPS Space Segment o Consists of a constellation of 24 satellites (and about six "spares"), each in its own orbit kilometres above Earth. Four additional satellites are held in reserve as spares Control Segment o Consists of ground stations (6 of them, located around the world) that make sure the satellites are working properly. The master control station at Schriever Air Force Base, near Colorado Springs, Colorado, runs the system Users Segment o Consists of receivers, which you can hold in your hand or mount in a vehicle, like your car, stationary 17

18 ELEMENTS OF GPS 18

19 SPACE SEGMENT (CONSTELLATION OF SATELLITES) 19

20 SPACE SEGMENT (CONSTELLATION OF SATELLITES) An orbit is one trip in space around Earth for 24 hours satellite coverage The satellites travel in near-circular orbits that have a mean altitude of 20,200 km above the earth and orbital period of 12 hours to orbit Earth Precise atomic clocks are used in the GPS satellites so that it keeps time to within three nanoseconds - that s , or three-billionths, of a second Broadcast signals synchronized with those from other satellites The signal travels at the speed of light. Even at this speed, the signal takes a measurable amount of time to reach the receiver 20

21 SPACE SEGMENT (CONSTELLATION OF SATELLITES) The difference between the time when the signal is received and the time when it was sent, multiplied by the speed of light, enables the receiver to calculate the distance to the satellite For more accurate measurement, the GPS navigation signals are specially designed for GPS receivers to measure the time of arrival and to allow all the satellites to operate on the same frequency without interfering with each other To calculate its precise latitude, longitude, and altitude, the receiver measures the distance to four separate GPS satellites. By using four satellites, the receiver calculates both its position and the time and doesn't need an expensive atomic clock like those on the satellites 21

22 CONTROL SEGMENT (GROUND STATION) US Air Force and NIMA Control and Tracking Stations MCS Colorado Springs Hermitage Bahrain Hawaii Ascension Kwajalein Ouito Diego Garcia Smithfield Buenos Aires US Airforce Tracking Sites US Airforce Upload Sites US NIMA Tracking Sites See also map at < MCS Master Control Station

23 CONTROL SEGMENT (GROUND STATION) The GPS control segment consists of twelve monitoring stations located around the world A master control station at Schriever Air Force Base in Colorado Springs, Colorado Six monitor stations: Hawaii and Kwajalein in the Pacific Ocean; Diego Garcia in the Indian Ocean; Ascension Island in the Atlantic Ocean; Cape Canaveral, Florida and Colorado Springs, Colorado Four large ground-antenna stations send commands and data up to the satellites and collect telemetry back from them 23

24 CONTROL SEGMENT (GROUND STATION) The monitor stations track the navigation signals and send their data back to the master control station. There, the controllers determine any adjustments or updates to the navigation signals needed to maintain precise navigation and update the satellites via the ground antennas. To further improve system accuracy, in 2005, the master control station added data from six monitor stations operated by the National Geospatial-Intelligence Agency to the six GPS monitor stations 24

25 USER SEGMENT (RECEIVERS) 25

26 USER SEGMENT (RECEIVERS) 26

27 USER SEGMENT (RECEIVERS) GPS receivers can be carried in your hand Installed on aircraft, ships, tanks, submarines, cars, and trucks Stationary These receivers detect, decode, and process GPS satellite signals More than 100 different receiver models are already in use 27

28 USER SEGMENT (RECEIVERS) The typical hand-held receiver is about the size of a cellular telephone, and the newer models are even smaller and fit in a wristwatch or a Personal Data Assistant The commercial hand-held units distributed to U.S. armed forces personnel during the Persian Gulf War weighed only 28 ounces (less than two pounds). Since then, basic receiver functions have been miniaturized onto integrated circuits that weigh about one ounce 28

29 SIGNALS GPS satellites transmit two low power radio signals, designated L1 and L2. Recently L5 Civilian GPS uses the L1 frequency of MHz and L2 frequency of MHz in the UHF band The signals travel by line of sight, meaning they will pass through clouds, glass and plastic but will not go through most solid objects such as buildings and mountains A GPS signal contains three different bits of information - a pseudorandom code, ephemeris data and almanac data The pseudorandom code is simply an I.D. code that identifies which satellite is transmitting information. You can view this number on your GPS unit's satellite page, as it identifies which satellites it's receiving 29

30 SIGNALS Ephemeris data tells the GPS receiver where each GPS satellite should be at any time throughout the day. Each satellite transmits ephemeris data showing the orbital information for that satellite and for every other satellite in the system Almanac data, which is constantly transmitted by each satellite, contains important information about the status of the satellite (healthy or unhealthy), current date and time. This part of the signal is essential for determining a position 30

31 SOURCES OF ERROR IN GPS Factors that can degrade the GPS signal and thus affect accuracy include the following: o Ionosphere and troposphere delays The satellite signal slows as it passes through the atmosphere. The GPS system uses a built-in model that calculates an average amount of delay to partially correct for this type of error o Signal multipath This occurs when the GPS signal is reflected off objects such as tall buildings or large rock surfaces before it reaches the receiver. This increases the travel time of the signal, thereby causing errors o Receiver clock errors A receiver's built-in clock is not as accurate as the atomic clocks onboard the GPS satellites. Therefore, it may have very slight timing errors o Orbital errors Also known as ephemeris errors, these are inaccuracies of the satellite's reported location 31

32 SOURCES OF ERROR IN GPS o Number of satellites visible The more satellites a GPS receiver can "see," the better the accuracy. Buildings, terrain, electronic interference, or sometimes even dense foliage can block signal reception, causing position errors or possibly no position reading at all. GPS units typically will not work indoors, underwater or underground o Satellite geometry/shading This refers to the relative position of the satellites at any given time. Ideal satellite geometry exists when the satellites are located at wide angles relative to each other. Poor geometry results when the satellites are located in a line or in a tight grouping o Intentional degradation of the satellite signal Selective Availability (SA) is an intentional degradation of the signal once imposed by the U.S. Department of Defense. SA was intended to prevent military adversaries from using the highly accurate GPS signals. The government turned off SA in May 2000, which significantly improved the accuracy of civilian GPS receivers 32

33 HOW DOES GPS WORKS The principle behind GPS is the measurement of distance (or range ) between the satellites and the receiver The satellites tell us exactly where they are in their orbits by broadcasting data the receiver uses to compute their positions It works something like this: o o o If we know our exact distance from a satellite in space, we know we are somewhere on the surface of an imaginary sphere with a radius equal to the distance to the satellite radius If we know our exact distance from two satellites, we know that we are located somewhere on the line where the two spheres intersect And, if we take a third and a fourth measurement from two more satellites, we can find our location. The GPS receiver processes the satellite range measurements and produces its position 33

34 HOW DOES GPS WORKS GPS uses a system of coordinates called WGS 84, which stands for World Geodetic System 1984 It allows surveyors all around the world to produce maps like the ones you see in school, all with a common reference frame for the lines of latitude and longitude that locate places and things Likewise, GPS uses time from the United States Naval Observatory in Washington, D.C., to synchronize all the timing elements of the GPS system, much like Harrison's chronometer was synchronized to the time at Greenwich 34

35 HOW DOES GPS WORKS Now you should have a fairly clear picture of the GPS system: o You know that it consists of satellites whose paths are monitored by ground stations o Each satellite generates radio signals that allow a receiver to estimate the satellite location and distance between the satellite and the receiver o The receiver uses the measurements to calculate where on or above Earth the user is located 35

36 USES OF GPS For Military o GPS system has already proved to be a valuable aid to U.S. military forces o With GPS the soldiers were able to go places and manoeuvre in sandstorms or at night. More than 1,000 portable commercial receivers were initially purchased for their use o The demand was so great that before the end of the conflict, more than 9,000 commercial receivers were in use in the Gulf region. They were carried by soldiers on the ground and were attached to vehicles, helicopters, and aircraft instrument panels o Navy ships used them for rendezvous, minesweeping, and aircraft operations 36

37 USES OF GPS For Civilians o GPS is helping to save lives and property across the nation. Example: o In 2002, it enabled rescuers to drill a shaft to free trapped miners in Somerset o Many police, fire, and emergency medical-service units use GPS receivers to determine the police car, fire truck, or ambulance nearest to an emergency, enabling the quickest possible response in life-or-death situations o GPS-equipped aircraft can quickly plot the perimeter of a forest fire so fire supervisors can produce updated maps in the field and send fire fighters safely to key hot spots 37

38 USES OF GPS For Constructions o Mapping, construction, and surveying companies use GPS extensively o During construction of the tunnel under the English Channel, British and French crews started digging from opposite ends: one from Dover, England, and one from Calais, France. They relied on GPS receivers outside the tunnel to check their positions along the way and to make sure they met exactly in the middle. Otherwise, the tunnel might have been crooked Example : o GPS allows mine operators to navigate mining equipment safely, even when visibility is obscured 38

39 USES OF GPS GPS-equipped fleet vehicles, public transportation systems, delivery trucks, and courier services use receivers to monitor their locations at all times for both efficiency and driver safety Automobile manufacturers are offering moving-map displays guided by GPS receivers as an option on new vehicles. The displays can be removed and taken into a home to plan a trip. Several major rental car companies have GPS-equipped vehicles that give directions to drivers on display screens and through synthesized voice instructions 39

40 USES OF GPS GPS-equipped balloons monitor holes in the ozone layer over the polar regions as well as air quality across the nation Buoys tracking major oil spills transmit data using GPS to guide cleanup operations Archaeologists, biologists, and explorers are using the system to locate ancient ruins, migrating animal herds, and endangered species such as manatees, snow leopards, and giant pandas 40

41 Thank You & Question And Answer 41

GLOBAL POSITIONING SYSTEMS. Knowing where and when

GLOBAL POSITIONING SYSTEMS. Knowing where and when GLOBAL POSITIONING SYSTEMS Knowing where and when Overview Continuous position fixes Worldwide coverage Latitude/Longitude/Height Centimeter accuracy Accurate time Feasibility studies begun in 1960 s.

More information

GLOBAL NAVIGATION SATELLITE SYSTEMS (GNSS) ECE 2526E Tuesday, 24 April 2018

GLOBAL NAVIGATION SATELLITE SYSTEMS (GNSS) ECE 2526E Tuesday, 24 April 2018 GLOBAL NAVIGATION SATELLITE SYSTEMS (GNSS) ECE 2526E Tuesday, 24 April 2018 MAJOR GLOBAL NAVIGATION SATELLITE SYSTEMS (GNSS) Global Navigation Satellite System (GNSS) includes: 1. Global Position System

More information

What is a GPS How does GPS work? GPS Segments GPS P osition Position Position Accuracy Accuracy Accuracy GPS A pplications Applications Applications

What is a GPS How does GPS work? GPS Segments GPS P osition Position Position Accuracy Accuracy Accuracy GPS A pplications Applications Applications What is GPS? What is a GPS How does GPS work? GPS Segments GPS Position Accuracy GPS Applications What is GPS? The Global Positioning System (GPS) is a precise worldwide radio-navigation system, and consists

More information

Global Positioning Systems (GPS) Trails: the achilles heel of mapping from the air / satellites

Global Positioning Systems (GPS) Trails: the achilles heel of mapping from the air / satellites Global Positioning Systems (GPS) Trails: the achilles heel of mapping from the air / satellites Google maps updated regularly by local users using GPS Also: http://openstreetmaps.org GPS applications

More information

GLOBAL POSITIONING SYSTEMS

GLOBAL POSITIONING SYSTEMS GLOBAL POSITIONING SYSTEMS GPS & GIS Fall 2017 Global Positioning Systems GPS is a general term for the navigation system consisting of 24-32 satellites orbiting the Earth, broadcasting data that allows

More information

Lecture # 7 Coordinate systems and georeferencing

Lecture # 7 Coordinate systems and georeferencing Lecture # 7 Coordinate systems and georeferencing Coordinate Systems Coordinate reference on a plane Coordinate reference on a sphere Coordinate reference on a plane Coordinates are a convenient way of

More information

Lecture 03. Introduction to Global Positioning Systems

Lecture 03. Introduction to Global Positioning Systems Lecture 03 Introduction to Global Positioning Systems Introduction to Global Positioning Systems: From time immemorial humans have been trying to locate their position and find their ways on the planet

More information

PRINCIPLES AND FUNCTIONING OF GPS/ DGPS /ETS ER A. K. ATABUDHI, ORSAC

PRINCIPLES AND FUNCTIONING OF GPS/ DGPS /ETS ER A. K. ATABUDHI, ORSAC PRINCIPLES AND FUNCTIONING OF GPS/ DGPS /ETS ER A. K. ATABUDHI, ORSAC GPS GPS, which stands for Global Positioning System, is the only system today able to show you your exact position on the Earth anytime,

More information

Module Introduction. Purpose The intent of this module is to provide you with an overview of the Global Positioning System.

Module Introduction. Purpose The intent of this module is to provide you with an overview of the Global Positioning System. Purpose The intent of this module is to provide you with an overview of the Global Positioning System. Objectives Explain the basic concept of GPS. Identify various applications of GPS. Describe how GPS

More information

36. Global Positioning System

36. Global Positioning System 36. Introduction to the Global Positioning System (GPS) Why do we need GPS? Position: a basic need safe sea travel, crowed skies, resource management, legal questions Positioning: a challenging job local

More information

NR402 GIS Applications in Natural Resources

NR402 GIS Applications in Natural Resources NR402 GIS Applications in Natural Resources Lesson 5 GPS/GIS integration Global Positioning System (GPS)..a global navigation system that everyone can use What is GPS? How does it work? How accurate is

More information

Primer on GPS Operations

Primer on GPS Operations MP Rugged Wireless Modem Primer on GPS Operations 2130313 Rev 1.0 Cover illustration by Emma Jantz-Lee (age 11). An Introduction to GPS This primer is intended to provide the foundation for understanding

More information

Introduction to the Global Positioning System

Introduction to the Global Positioning System GPS for Fire Management - 2004 Introduction to the Global Positioning System Pre-Work Pre-Work Objectives Describe at least three sources of GPS signal error, and identify ways to mitigate or reduce those

More information

What is GPS? GPS Position Accuracy. GPS Applications. What is a GPS. How does GPS work? GPS Segments

What is GPS? GPS Position Accuracy. GPS Applications. What is a GPS. How does GPS work? GPS Segments What is GPS? What is a GPS How does GPS work? GPS Segments GPS Position Accuracy GPS Applications 1 What is GPS? The Global Positioning System (GPS) is a precise worldwide radio-navigation system, and

More information

Basics of Satellite Navigation an Elementary Introduction Prof. Dr. Bernhard Hofmann-Wellenhof Graz, University of Technology, Austria

Basics of Satellite Navigation an Elementary Introduction Prof. Dr. Bernhard Hofmann-Wellenhof Graz, University of Technology, Austria Basics of Satellite Navigation an Elementary Introduction Prof. Dr. Bernhard Hofmann-Wellenhof Graz, University of Technology, Austria CONCEPT OF GPS Prof. Dr. Bernhard Hofmann-Wellenhof Graz, University

More information

Introduction to NAVSTAR GPS

Introduction to NAVSTAR GPS Introduction to NAVSTAR GPS Charlie Leonard, 1999 (revised 2001, 2002) The History of GPS Feasibility studies begun in 1960 s. Pentagon appropriates funding in 1973. First satellite launched in 1978. System

More information

Entity Tracking and Surveillance using the Modified Biometric System, GPS-3

Entity Tracking and Surveillance using the Modified Biometric System, GPS-3 Advance in Electronic and Electric Engineering. ISSN 2231-1297, Volume 3, Number 9 (2013), pp. 1115-1120 Research India Publications http://www.ripublication.com/aeee.htm Entity Tracking and Surveillance

More information

FieldGenius Technical Notes GPS Terminology

FieldGenius Technical Notes GPS Terminology FieldGenius Technical Notes GPS Terminology Almanac A set of Keplerian orbital parameters which allow the satellite positions to be predicted into the future. Ambiguity An integer value of the number of

More information

GE 113 REMOTE SENSING

GE 113 REMOTE SENSING GE 113 REMOTE SENSING Topic 9. Introduction to Global Positioning Systems (GPS) and Other GNSS Technologies Lecturer: Engr. Jojene R. Santillan jrsantillan@carsu.edu.ph Division of Geodetic Engineering

More information

Introduction to the Global Positioning System

Introduction to the Global Positioning System GPS for ICS - 2003 Introduction to the Global Positioning System Pre-Work Pre-Work Objectives Describe at least three sources of GPS signal error, and ways to mitigate or reduce those errors. Identify

More information

GPS Technical Overview N5TWP NOV08. How Can GPS Mislead

GPS Technical Overview N5TWP NOV08. How Can GPS Mislead GPS Technical Overview How Can GPS Mislead 1 Objectives Components of GPS Satellite Acquisition Process Position Determination How can GPS Mislead 2 Components of GPS Control Segment Series of monitoring

More information

GPS Global Positioning System

GPS Global Positioning System GPS Global Positioning System 10.04.2012 1 Agenda What is GPS? Basic consept History GPS receivers How they work Comunication Message format Satellite frequencies Sources of GPS signal errors 10.04.2012

More information

Lecture 04. Elements of Global Positioning Systems

Lecture 04. Elements of Global Positioning Systems Lecture 04 Elements of Global Positioning Systems Elements of GPS: During the last lecture class we talked about Global Positioning Systems and its applications. With so many innumerable applications of

More information

UNITED NATIONS UNIVERSITY Institute for Environment & Human Security (UNU-EHS) Bonn, Germany

UNITED NATIONS UNIVERSITY Institute for Environment & Human Security (UNU-EHS) Bonn, Germany UNITED NATIONS UNIVERSITY Institute for Environment & Human Security (UNU-EHS) Bonn, Germany Introduction to GPS technology Prof. Dr. Jörg Szarzynski Education Programme Director Head of Section EduSphere

More information

GLOBAL POSITIONING SYSTEMS

GLOBAL POSITIONING SYSTEMS GLOBAL POSITIONING SYSTEMS Maps & Geospatial Concepts Fall 2015 Before GPS Historical look at navigation Giant concrete arrows that point your way across America What are these giant arrows? Some kind

More information

Introduction. Global Positioning System. GPS - Intro. Space Segment. GPS - Intro. Space Segment - Contd..

Introduction. Global Positioning System. GPS - Intro. Space Segment. GPS - Intro. Space Segment - Contd.. Introduction Global Positioning System Prof. D. Nagesh Kumar Dept. of Civil Engg., IISc, Bangalore 560 012, India URL: http://www.civil.iisc.ernet.in/~nagesh GPS is funded and controlled by U. S. Department

More information

t =1 Transmitter #2 Figure 1-1 One Way Ranging Schematic

t =1 Transmitter #2 Figure 1-1 One Way Ranging Schematic 1.0 Introduction OpenSource GPS is open source software that runs a GPS receiver based on the Zarlink GP2015 / GP2021 front end and digital processing chipset. It is a fully functional GPS receiver which

More information

The GLOBAL POSITIONING SYSTEM James R. Clynch February 2006

The GLOBAL POSITIONING SYSTEM James R. Clynch February 2006 The GLOBAL POSITIONING SYSTEM James R. Clynch February 2006 I. Introduction What is GPS The Global Positioning System, or GPS, is a satellite based navigation system developed by the United States Defense

More information

GNSS 101 Bringing It Down To Earth

GNSS 101 Bringing It Down To Earth GNSS 101 Bringing It Down To Earth Steve Richter Frontier Precision, Inc. UTM County Coordinates NGVD 29 State Plane Datums Scale Factors Projections Session Agenda GNSS History & Basic Theory Coordinate

More information

Introduction to Geographic Information Science. Last Lecture. Today s Outline. Geography 4103 / GNSS/GPS Technology

Introduction to Geographic Information Science. Last Lecture. Today s Outline. Geography 4103 / GNSS/GPS Technology Geography 4103 / 5103 Introduction to Geographic Information Science GNSS/GPS Technology Last Lecture Geoids Ellipsoid Datum Projection Basics Today s Outline GNSS technology How satellite based navigation

More information

GPS and Recent Alternatives for Localisation. Dr. Thierry Peynot Australian Centre for Field Robotics The University of Sydney

GPS and Recent Alternatives for Localisation. Dr. Thierry Peynot Australian Centre for Field Robotics The University of Sydney GPS and Recent Alternatives for Localisation Dr. Thierry Peynot Australian Centre for Field Robotics The University of Sydney Global Positioning System (GPS) All-weather and continuous signal system designed

More information

Sources of Geographic Information

Sources of Geographic Information Sources of Geographic Information Data properties: Spatial data, i.e. data that are associated with geographic locations Data format: digital (analog data for traditional paper maps) Data Inputs: sampled

More information

GPS Tutorial Trimble Home > GPS Tutorial > How GPS works? > Triangulating

GPS Tutorial Trimble Home > GPS Tutorial > How GPS works? > Triangulating http://www.trimble.com/gps/howgps-triangulating.shtml Page 1 of 3 Trimble Worldwide Popula PRODUCTS & SOLUTIONS SUPPORT & TRAINING ABOUT TRIMBLE INVESTORS GPS Tutorial Trimble Home > GPS Tutorial > How

More information

GPS Errors. Figure 1. Four satellites are required to determine a GPS position.

GPS Errors. Figure 1. Four satellites are required to determine a GPS position. Expl ai ni nggps:thegl obalposi t i oni ngsyst em since a minimum of four satellites is required to calculate a position (Fig 1). However, many newer GPS receivers are equipped to receive up to 12 satellite

More information

Line and polygon features can be created via on-screen digitizing.

Line and polygon features can be created via on-screen digitizing. This module explains how GPS works, sources of error, and error correction using real time or post processing differential correction. Cost and accuracy of different grades of GPS units are also part of

More information

Lecture-1 CHAPTER 2 INTRODUCTION TO GPS

Lecture-1 CHAPTER 2 INTRODUCTION TO GPS Lecture-1 CHAPTER 2 INTRODUCTION TO GPS 2.1 History of GPS GPS is a global navigation satellite system (GNSS). It is the commonly used acronym of NAVSTAR (NAVigation System with Time And Ranging) GPS (Global

More information

CHAPTER 2 GPS GEODESY. Estelar. The science of geodesy is concerned with the earth by quantitatively

CHAPTER 2 GPS GEODESY. Estelar. The science of geodesy is concerned with the earth by quantitatively CHAPTER 2 GPS GEODESY 2.1. INTRODUCTION The science of geodesy is concerned with the earth by quantitatively describing the coordinates of each point on the surface in a global or local coordinate system.

More information

Principal Investigator Co-Principal Investigator Co-Principal Investigator Prof. Talat Ahmad Vice-Chancellor Jamia Millia Islamia Delhi

Principal Investigator Co-Principal Investigator Co-Principal Investigator Prof. Talat Ahmad Vice-Chancellor Jamia Millia Islamia Delhi Subject Paper No and Title Module No and Title Module Tag Geology Remote Sensing and GIS Concepts of Global Navigation Satellite RS & GIS XXXIII Principal Investigator Co-Principal Investigator Co-Principal

More information

Geodesy, Geographic Datums & Coordinate Systems

Geodesy, Geographic Datums & Coordinate Systems Geodesy, Geographic Datums & Coordinate Systems What is the shape of the earth? Why is it relevant for GIS? 1/23/2018 2-1 From Conceptual to Pragmatic Dividing a sphere into a stack of pancakes (latitude)

More information

The Global Positioning System

The Global Positioning System The Global Positioning System 5-1 US GPS Facts of Note DoD navigation system First launch on 22 Feb 1978, fully operational in 1994 ~$15 billion (?) invested to date 24 (+/-) Earth-orbiting satellites

More information

GPS 101. An Introduction to Using a GPS Receiver

GPS 101. An Introduction to Using a GPS Receiver GPS 101 An Introduction to Using a GPS Receiver The goal of this presentation if to provide a basic understanding of what is GPS, how it works, provide some basic terminology and to provide ideas on how

More information

GPS (GLOBAL POSITIONING SYSTEM)

GPS (GLOBAL POSITIONING SYSTEM) GPS (GLOBAL POSITIONING SYSTEM) What is GPS? GPS, standing for Global Positioning System, is becoming common nowadays. Following is a brief introduction. The American Defense Department developed GPS originally

More information

GPS Milestones, cont. GPS Milestones. The Global Positioning Sytem, Part 1 10/10/2017. M. Helper, GEO 327G/386G, UT Austin 1. US GPS Facts of Note

GPS Milestones, cont. GPS Milestones. The Global Positioning Sytem, Part 1 10/10/2017. M. Helper, GEO 327G/386G, UT Austin 1. US GPS Facts of Note The Global Positioning System US GPS Facts of Note DoD navigation system First launch on 22 Feb 1978, fully operational in 1994 ~$15 billion (?) invested to date 24 (+/-) Earth-orbiting satellites (SVs)

More information

Comprehensive Study of GNSS Systems

Comprehensive Study of GNSS Systems Quest Journals Journal of Software Engineering and Simulation Volume 3 ~ Issue 2 (2016) pp: 01-06 ISSN(Online) :2321-3795 ISSN (Print):2321-3809 www.questjournals.org Research Paper Comprehensive Study

More information

Challenges and Solutions for GPS Receiver Test

Challenges and Solutions for GPS Receiver Test Challenges and Solutions for GPS Receiver Test Presenter: Mirin Lew January 28, 2010 Agenda GPS technology concepts GPS and GNSS overview Assisted GPS (A-GPS) Basic tests required for GPS receiver verification

More information

Digital Surveillance Devices?

Digital Surveillance Devices? Technology Framework Tracking Technologies Don Mason Associate Director Digital Surveillance Devices? Digital Surveillance Devices? Secure Continuous Remote Alcohol Monitor SCRAM Page 1 Location Tracking

More information

Introduction to Datums James R. Clynch February 2006

Introduction to Datums James R. Clynch February 2006 Introduction to Datums James R. Clynch February 2006 I. What Are Datums in Geodesy and Mapping? A datum is the traditional answer to the practical problem of making an accurate map. If you do not have

More information

Global Positioning Systems -GPS

Global Positioning Systems -GPS Global Positioning Systems -GPS GPS Why? What is it? How does it work? Differential GPS How can it help me? GPS Why?? Where am I? How do I get there? Where are you, and how do I get to You? WHO CARES???

More information

Digital surveillance devices?

Digital surveillance devices? Technology Framework Tracking Technologies Don Mason Associate Director Copyright 2011 National Center for Justice and the Rule of Law All Rights Reserved Digital surveillance devices? Digital surveillance

More information

Problem Areas of DGPS

Problem Areas of DGPS DYNAMIC POSITIONING CONFERENCE October 13 14, 1998 SENSORS Problem Areas of DGPS R. H. Prothero & G. McKenzie Racal NCS Inc. (Houston) Table of Contents 1.0 ABSTRACT... 2 2.0 A TYPICAL DGPS CONFIGURATION...

More information

2 INTRODUCTION TO GNSS REFLECTOMERY

2 INTRODUCTION TO GNSS REFLECTOMERY 2 INTRODUCTION TO GNSS REFLECTOMERY 2.1 Introduction The use of Global Navigation Satellite Systems (GNSS) signals reflected by the sea surface for altimetry applications was first suggested by Martín-Neira

More information

MOBILE COMPUTING 1/28/18. Location, Location, Location. Overview. CSE 40814/60814 Spring 2018

MOBILE COMPUTING 1/28/18. Location, Location, Location. Overview. CSE 40814/60814 Spring 2018 MOBILE COMPUTING CSE 40814/60814 Spring 018 Location, Location, Location Location information adds context to activity: location of sensed events in the physical world location-aware services location

More information

How is GPS Used in Farming? Equipment Guidance Systems

How is GPS Used in Farming? Equipment Guidance Systems GPS Applications in Crop Production John Nowatzki, Extension Geospatial Specialist, Vern Hofman, Extension Ag Engineer Lowell Disrud, Assistant Professor, Kraig Nelson, Graduate Student Introduction The

More information

Resection. We can measure direction in the real world! Lecture 10: Position Determination. Resection Example: Isola, Slovenia. Professor Keith Clarke

Resection. We can measure direction in the real world! Lecture 10: Position Determination. Resection Example: Isola, Slovenia. Professor Keith Clarke Geography 12: Maps and Spatial Reasoning Lecture 10: Position Determination We can measure direction in the real world! Professor Keith Clarke Resection Resection Example: Isola, Slovenia Back azimuth

More information

GPS Basics. Introduction to GPS (Global Positioning System) Version 1.0 English

GPS Basics. Introduction to GPS (Global Positioning System) Version 1.0 English 20 30 40 50 GPS Basics Introduction to GPS (Global Positioning System) Version 1.0 English Contents Preface... 4 1. What is GPS and what does it do?... 5 2. System Overview... 6 2.1 The Space Segment...

More information

GPS (Introduction) References. Terms

GPS (Introduction) References. Terms GPS (Introduction) WCOM2, GPS, 1 Terms NAVSTAR GPS ( Navigational Satellite Timing and Ranging - Global Positioning System) is a GNSS (Global Navigation Satellite System), developed by the US-DoD in 197x

More information

The topic we are going to see in this unit, the global positioning system, is not directly related with the computer networks we use everyday, but it

The topic we are going to see in this unit, the global positioning system, is not directly related with the computer networks we use everyday, but it The topic we are going to see in this unit, the global positioning system, is not directly related with the computer networks we use everyday, but it is indeed a kind of computer network, as the specialised

More information

GNSS: orbits, signals, and methods

GNSS: orbits, signals, and methods Part I GNSS: orbits, signals, and methods 1 GNSS ground and space segments Global Navigation Satellite Systems (GNSS) at the time of writing comprise four systems, two of which are fully operational and

More information

GPS: The Basics. Darrell R. Dean, Jr. Civil and Environmental Engineering West Virginia University. Expected Learning Outcomes for GPS

GPS: The Basics. Darrell R. Dean, Jr. Civil and Environmental Engineering West Virginia University. Expected Learning Outcomes for GPS GPS: The Basics Darrell R. Dean, Jr. Civil and Environmental Engineering West Virginia University Expected Learning Outcomes for GPS Explain the acronym GPS Name 3 important tdt dates in history of GPS

More information

Errors in GPS. Errors in GPS. Geodetic Co-ordinate system. R. Khosla Fall Semester

Errors in GPS. Errors in GPS. Geodetic Co-ordinate system. R. Khosla Fall Semester Errors in GPS Errors in GPS GPS is currently the most accurate positioning system available globally. Although we are talking about extreme precision and measuring distances by speed of light, yet there

More information

King AbdulAziz University. Faculty of Environmental Design. Geomatics Department. Mobile GIS GEOM 427. Lecture 3

King AbdulAziz University. Faculty of Environmental Design. Geomatics Department. Mobile GIS GEOM 427. Lecture 3 King AbdulAziz University Faculty of Environmental Design Geomatics Department Mobile GIS GEOM 427 Lecture 3 Ahmed Baik, Ph.D. Email: abaik@kau.edu.sa Eng. Fisal Basheeh Email: fbasaheeh@kau.edu.sa GNSS

More information

USB GPS Dongle 65 channels With AGPS Function User s Manual

USB GPS Dongle 65 channels With AGPS Function User s Manual USB GPS Dongle 65 channels With AGPS Function User s Manual Pure white Shine silver Galaxy Black 1 General description of what GPS is and how it works GPS (Global Positioning System) is the only system

More information

Proceedings of Al-Azhar Engineering 7 th International Conference Cairo, April 7-10, 2003.

Proceedings of Al-Azhar Engineering 7 th International Conference Cairo, April 7-10, 2003. Proceedings of Al-Azhar Engineering 7 th International Conference Cairo, April 7-10, 2003. MODERNIZATION PLAN OF GPS IN 21 st CENTURY AND ITS IMPACTS ON SURVEYING APPLICATIONS G. M. Dawod Survey Research

More information

Global Positioning Systems - GPS

Global Positioning Systems - GPS Global Positioning Systems - GPS GPS Why? What is it? How does it work? Differential GPS How can it help me? GPS Why?? Where am I? How do I get there? Where are you, and how do I get to You? WHO CARES???

More information

GNSS & Coordinate Systems

GNSS & Coordinate Systems GNSS & Coordinate Systems Matthew McAdam, Marcelo Santos University of New Brunswick, Department of Geodesy and Geomatics Engineering, Fredericton, NB May 29, 2012 Santos, 2004 msantos@unb.ca 1 GNSS GNSS

More information

Electronic Record Keeping: Multiple Perspectives. The Paper Perspective

Electronic Record Keeping: Multiple Perspectives. The Paper Perspective Electronic Record Keeping: Multiple Perspectives Presented by Gary Markham (ProMiles) and Doug Varnes (IL) The Paper Perspective For years carriers have tracked their mileage using paper trips 1 The Paper

More information

An Introduction to Airline Communication Types

An Introduction to Airline Communication Types AN INTEL COMPANY An Introduction to Airline Communication Types By Chip Downing, Senior Director, Aerospace & Defense WHEN IT MATTERS, IT RUNS ON WIND RIVER EXECUTIVE SUMMARY Today s global airliners use

More information

Grind. A Practical. Ax Manual. Bill Kilroy Mechanical Engineering Technician. Tony Jasumback and Dick Karsky Project Leaders

Grind. A Practical. Ax Manual. Bill Kilroy Mechanical Engineering Technician. Tony Jasumback and Dick Karsky Project Leaders United States Department of Agriculture Forest Service Technology & Development Program 2200 Range 2300 Recreation 2400 Timber 2600 Wildlife 3400 Forest Health Protection 5100 Fire 5300 Law Enforcement

More information

Global Navigation Satellite Systems II

Global Navigation Satellite Systems II Global Navigation Satellite Systems II AERO4701 Space Engineering 3 Week 4 Last Week Examined the problem of satellite coverage and constellation design Looked at the GPS satellite constellation Overview

More information

Appendix D Brief GPS Overview

Appendix D Brief GPS Overview Appendix D Brief GPS Overview Global Positioning System (GPS) Theory What is GPS? The Global Positioning System (GPS) is a satellite-based navigation system, providing position information, accurate to

More information

Mobile Positioning in Wireless Mobile Networks

Mobile Positioning in Wireless Mobile Networks Mobile Positioning in Wireless Mobile Networks Peter Brída Department of Telecommunications and Multimedia Faculty of Electrical Engineering University of Žilina SLOVAKIA Outline Why Mobile Positioning?

More information

UNIT 1 - introduction to GPS

UNIT 1 - introduction to GPS UNIT 1 - introduction to GPS 1. GPS SIGNAL Each GPS satellite transmit two signal for positioning purposes: L1 signal (carrier frequency of 1,575.42 MHz). Modulated onto the L1 carrier are two pseudorandom

More information

Global Navigation Satellite Systems (GNSS): GPS, GLONASS, GALILEO

Global Navigation Satellite Systems (GNSS): GPS, GLONASS, GALILEO Global Navigation Satellite Systems ():,, Dr Guergana Guerova Marie Curie Fellow Department of Meteorology and Geophysics Physics Faculty, Sofia University National Culture High School, 13 November 2012,

More information

PDHonline Course L105 (12 PDH) GPS Surveying. Instructor: Jan Van Sickle, P.L.S. PDH Online PDH Center

PDHonline Course L105 (12 PDH) GPS Surveying. Instructor: Jan Van Sickle, P.L.S. PDH Online PDH Center PDHonline Course L105 (12 PDH) GPS Surveying Instructor: Jan Van Sickle, P.L.S. 2012 PDH Online PDH Center 5272 Meadow Estates Drive Fairfax, VA 22030-6658 Phone & Fax: 703-988-0088 www.pdhonline.org www.pdhcenter.com

More information

CHAPTER 2 GEODESY AND DATUMS IN NAVIGATION

CHAPTER 2 GEODESY AND DATUMS IN NAVIGATION CHAPTER 2 GEODESY AND DATUMS IN NAVIGATION GEODESY, THE BASIS OF CARTOGRAPHY 200. Definition Geodesy is the science concerned with the exact positioning of points on the surface of the earth. It also involves

More information

Global Navigation Satellite Systems (GNSS): GPS, GLONASS, GALILEO

Global Navigation Satellite Systems (GNSS): GPS, GLONASS, GALILEO Global Navigation Satellite Systems ():,, Dr Guergana Guerova Marie Curie Fellow Department of Meteorology and Geophysics Physics Faculty, Sofia University Actual topics in the modern physics, Sofia University,

More information

GPS (Introduction) References. Terms

GPS (Introduction) References. Terms GPS (Introduction) MSE, Rumc, GPS, 1 Terms NAVSTAR GPS ( Navigational Satellite Timing and Ranging - Global Positioning System) is a GNSS (Global Navigation Satellite System), developed by the US-DoD in

More information

RECOMMENDATION ITU-R M *

RECOMMENDATION ITU-R M * Rec. ITU-R M.823-3 1 RECOMMENDATION ITU-R M.823-3 * Technical characteristics of differential transmissions for global navigation satellite systems from maritime radio beacons in the frequency band 283.5-315

More information

Global Positioning System (GPS) Positioning Errors During Ionospheric Scintillation Event. Keywords: GPS; scintillation; positioning error

Global Positioning System (GPS) Positioning Errors During Ionospheric Scintillation Event. Keywords: GPS; scintillation; positioning error Jurnal Teknologi Full paper Global Positioning System (GPS) Positioning Errors During Ionospheric Scintillation Event Y. H. Ho a*, S. Abdullah b, M. H. Mokhtar b a Faculty of Electronic and Computer Engineering,

More information

ENAiKOON inmarsat-600

ENAiKOON inmarsat-600 -600 Inmarsat modem for worldwide satellite communication -600 enables communication between trackables and the back-end system through satellite communication. -600 was designed specifically for fleet

More information

NGA s Support for Positioning and Navigation

NGA s Support for Positioning and Navigation NGA s Support for Positioning and Navigation PNT Symposium 6 November 2007 Barbara Wiley NATIONAL GEOSPATIAL-INTELLIGENCE AGENCY What is NGA and What Do We Do? National Geospatial-Intelligence Agency (NGA)

More information

ESTIMATION OF IONOSPHERIC DELAY FOR SINGLE AND DUAL FREQUENCY GPS RECEIVERS: A COMPARISON

ESTIMATION OF IONOSPHERIC DELAY FOR SINGLE AND DUAL FREQUENCY GPS RECEIVERS: A COMPARISON ESTMATON OF ONOSPHERC DELAY FOR SNGLE AND DUAL FREQUENCY GPS RECEVERS: A COMPARSON K. Durga Rao, Dr. V B S Srilatha ndira Dutt Dept. of ECE, GTAM UNVERSTY Abstract: Global Positioning System is the emerging

More information

Using GPS Receivers to Study the Upper Atmosphere

Using GPS Receivers to Study the Upper Atmosphere Using GPS Receivers to Study the Upper Atmosphere Jonathan J. Makela University of Illinois at Urbana-Champaign jmakela@illinois.edu With a big THANKS to Anthea Coster for providing some very useful slides!

More information

Math 215 Project 1 (25 pts) : Using Linear Algebra to solve GPS problem

Math 215 Project 1 (25 pts) : Using Linear Algebra to solve GPS problem Due 11:55pm Fri. Sept. 28 NAME(S): Math 215 Project 1 (25 pts) : Using Linear Algebra to solve GPS problem 1 Introduction The age old question, Where in the world am I? can easily be solved nowadays by

More information

GPS for the Search Function Nevada County Sheriff s Office Search and Rescue Team

GPS for the Search Function Nevada County Sheriff s Office Search and Rescue Team GPS for the Search Function Nevada County Sheriff s Office Search and Rescue Team Things we ll cover today What is a GPS and How does it work Things to always remember about your GPS Creating a Waypoint

More information

RECOMMENDATION ITU-R S.1257

RECOMMENDATION ITU-R S.1257 Rec. ITU-R S.157 1 RECOMMENDATION ITU-R S.157 ANALYTICAL METHOD TO CALCULATE VISIBILITY STATISTICS FOR NON-GEOSTATIONARY SATELLITE ORBIT SATELLITES AS SEEN FROM A POINT ON THE EARTH S SURFACE (Questions

More information

PDHonline Course L105 (12 PDH) GPS Surveying. Instructor: Jan Van Sickle, P.L.S. PDH Online PDH Center

PDHonline Course L105 (12 PDH) GPS Surveying. Instructor: Jan Van Sickle, P.L.S. PDH Online PDH Center PDHonline Course L105 (12 PDH) GPS Surveying Instructor: Jan Van Sickle, P.L.S. 2012 PDH Online PDH Center 5272 Meadow Estates Drive Fairfax, VA 22030-6658 Phone & Fax: 703-988-0088 www.pdhonline.org www.pdhcenter.com

More information

ELEMENTS OF THE NATIONAL SPATIAL REFERENCE SYSTEM

ELEMENTS OF THE NATIONAL SPATIAL REFERENCE SYSTEM Dave Doyle NGS Chief Geodetic Surveyor dave.doyle@noaa.gov 301-713-3178 ELEMENTS OF THE NATIONAL SPATIAL REFERENCE SYSTEM ESRI SURVEY SUMMIT San Diego, CA June 17, 2007 ftp://ftp.ngs.noaa.gov/dist/daved/esri

More information

MIT International Journal of Electrical and Instrumentation Engineering Vol. 3, No. 1, Jan. 2013, pp

MIT International Journal of Electrical and Instrumentation Engineering Vol. 3, No. 1, Jan. 2013, pp MIT International Journal of Electrical and Instrumentation Engineering Vol. 3, No. 1, Jan. 2013, pp. 33 39 33 Protection of Transmission System Using Global Positioning System Saurabh Saxena A.P., EE

More information

GPS Glossary Written by Carl Carter SiRF Technology 2005

GPS Glossary Written by Carl Carter SiRF Technology 2005 GPS Glossary Written by Carl Carter SiRF Technology 2005 This glossary provides supplementary information for students of GPS Fundamentals. While many of the terms can have other definitions from those

More information

CHAPTER 2 GEODESY AND DATUMS IN NAVIGATION

CHAPTER 2 GEODESY AND DATUMS IN NAVIGATION CHAPTER 2 GEODESY AND DATUMS IN NAVIGATION GEODESY, THE BASIS OF CARTOGRAPHY 200. Definition Geodesy is the application of mathematics to model the size and shape of the physical earth, enabling us to

More information

2.017 DESIGN OF ELECTROMECHANICAL ROBOTIC SYSTEMS Fall 2009 Lab 3: GPS and Data Logging. September 28, 2009 Dr. Harrison H. Chin

2.017 DESIGN OF ELECTROMECHANICAL ROBOTIC SYSTEMS Fall 2009 Lab 3: GPS and Data Logging. September 28, 2009 Dr. Harrison H. Chin 2.017 DESIGN OF ELECTROMECHANICAL ROBOTIC SYSTEMS Fall 2009 Lab 3: GPS and Data Logging September 28, 2009 Dr. Harrison H. Chin Formal Labs 1. Microcontrollers Introduction to microcontrollers Arduino

More information

GPS based data acquisition system for mobile applications

GPS based data acquisition system for mobile applications GPS based data acquisition system for mobile applications D. Covaciu, I. Preda, Gh. Ciolan Transilvania University of Brasov, Romania e-mail: dinu.covaciu@unitbv.ro, pion@unitbv.ro, cgicu@unitbv.ro Abstract:

More information

Unguided Transmission Media

Unguided Transmission Media CS311 Data Communication Unguided Transmission Media by Dr. Manas Khatua Assistant Professor Dept. of CSE IIT Jodhpur E-mail: manaskhatua@iitj.ac.in Web: http://home.iitj.ac.in/~manaskhatua http://manaskhatua.github.io/

More information

The Next Generation of Secure Position, Navigation and Timing Technology

The Next Generation of Secure Position, Navigation and Timing Technology Navigation and Timing Technology November 2017 Contents Executive Summary 2 GPS on the Battlefield 2 Vulnerabilities of GPS 2 Staying Ahead of the Threat 3 Innovating For More Resilient PNT 3 Innovative,

More information

TEST YOUR SATELLITE NAVIGATION PERFORMANCE ON YOUR ANDROID DEVICE GLOSSARY

TEST YOUR SATELLITE NAVIGATION PERFORMANCE ON YOUR ANDROID DEVICE GLOSSARY TEST YOUR SATELLITE NAVIGATION PERFORMANCE ON YOUR ANDROID DEVICE GLOSSARY THE GLOSSARY This glossary aims to clarify and explain the acronyms used in GNSS and satellite navigation performance testing

More information

Applying Multisensor Information Fusion Technology to Develop an UAV Aircraft with Collision Avoidance Model

Applying Multisensor Information Fusion Technology to Develop an UAV Aircraft with Collision Avoidance Model 1 Applying Multisensor Information Fusion Technology to Develop an UAV Aircraft with Collision Avoidance Model {Final Version with

More information

Shared Use of DGPS for DP and Survey Operations

Shared Use of DGPS for DP and Survey Operations Gabriel Delgado-Saldivar The Use of DP-Assisted FPSOs for Offshore Well Testing Services DYNAMIC POSITIONING CONFERENCE October 17-18, 2006 Sensors Shared Use of DGPS for Dr. David Russell Subsea 7, Scotland

More information

GPS Status and Modernization

GPS Status and Modernization GPS Status and Modernization Nov 2011 Colonel Harold Martin PNT Command Lead AFSPC A3P "This briefing is for information only. No US Government commitment to sell, loan, lease, co-develop or co-produce

More information

DRONACHARYA GROUP OF INSTITUTIONS, GREATER NOIDA. SATELLITE COMMUNICATIONS (EEC 021) QUESTION BANK

DRONACHARYA GROUP OF INSTITUTIONS, GREATER NOIDA. SATELLITE COMMUNICATIONS (EEC 021) QUESTION BANK DRONACHARYA GROUP OF INSTITUTIONS, GREATER NOIDA. SATELLITE COMMUNICATIONS (EEC 021) QUESTION BANK 1. Write the advantages and disadvantages of Satellite Communication. 2. Distinguish between active and

More information