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Course 122 Details

 
Course 122: GPS Fundamentals and Enhancements (1.2 CEUs)
Instructor(s): Dr. Chris Hegarty, MITRE

Description

This is a 2-day course that presents an overview of how the GPS systems works, its historical evolution, its many applications, and its policy and operational considerations. It provides the fundamentals of GPS principles and technologies including clocks and timing, orbits and constellations, and satellites and control segment functions. See details for more information about this course. (Note: This course is the same as days 1 and 2 of Course 346 and Course 356.)

Objectives

  • To give a comprehensive introduction to GPS and DGPS technology, system concepts, design, operation, implementation and applications.
  • To provide detailed information on the GPS signal, its processing by the receiver, and the techniques by which GPS obtains position, velocity and time

Prerequisites

  • Some familiarity with engineering terms is helpful but not essential.

Who Should Attend?

  • Engineers and technical professionals seeking conceptual and detailed explanations of GPS technology, operation, capabilities, applications, and development trends
  • Professionals in navigation, positioning, and related fields who are concerned with the capabilities, operation and principles of GPS, DGPS, and related GNSS systems.
  • System analysts and specialists concerned with position data and its use.
  • Managers concerned with GPS, GNSS activities, or the positioning field.

Materials You Will Keep

  • A color electronic copy of all course notes will be provided on a USB Drive or CD-ROM. Bringing a laptop to this class is highly recommended; power access will be provided. 
  • A black and white hard copy of the course notes will also be provided. 
  • Introduction to GPS: The Global Positioning System, 2nd ed., Ahmed El-Rabbany, Artech House, 2006., OR Global Positioning System: Signals, Measurement and Performance, P. Misra and P. Enge, 2nd ed., 2011. (Note: This book offer does not apply to on-site contracts. Any books for on-site group contracts are negotiated on a case by case basis.)

Monday Morning

Fundamentals of GPS opertion. Overview of how the system works. U.S. policy and current status.

GPS System Description
● Overview and treminology
● Principles of operation
● Augmentations
● Trilateration
● Performance overview
● Modernization
 
GPS Policy and Context
● Condensed navigation system history
● GPS policy an dgovernance 
● Mondernization program
● Ground segment
● Other satellite navigation systems
 
GPS Applications
● Land
● Marine
● Aviation
● Science
● Personal navigation
● Accuracy measures
● Error sources

Monday Afternoon

Legacy GPS Signal
● Signal structure and characteristics
● Modulations: BPSK, DSSS, BOC
● Signal generation
● Navigation data
 
Measurements and Positioning 
● Pseudorange and carrier phase measurements
● Least squares solution
● Dilution of precision
● Types of Positioning solutions
 
GPS Receiver Basics
● Types of receivers
● Funcitional overview
● Antennas

Tuesday Morning

GPS Principles and Technologies
 
Clocks and Timing
● Importance for GPS
● Timescales
● Clock types
● Stability measures
● Relativistic effects
 
Geodesy and Satellite Orbits
● Coordinate frames and geodesy
● Satellite orbits
● GPS constellation
● Constellation maintenance
 
Satellites and Control Segment
● GPS satellite blocks
● Control segment components and operation
● Monitor stations, MCS, and grond antennas
● Upload carriers
● Ground control modernization

Tuesday Afternoon

Error sources and Models
● Sources of error and correction models
● GPS signals in space performance
● Ionospheric and Tropospheric effects
● Multipath
● Error budget
 
Augmentations and Other Constellations
● Augmentations: local area, satellite based, and regional
● Russia's GLONASS
● Europe's Galileo
● China's Compass (BeiDou)
 
Precise Positioning
● Precise positioning concepts
● Reference station networks
● RINEX data format
 

 
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