On-Site at Your Location Course 439 (1.8 CEUs)
GPS High Precision Kinematic Carrier Phase Techniques Day 1
Day 2
Day 3
Dr. Mark Petovello, University of Calgary 8:30 GPS Description and Status
● GPS characteristics, ranging concepts ● Space, control and user segments and status ● Dilution of Precision (DOP) ● User Equivalent Ranging Error (UERE) ● SPS and PPS positioning accuracies ● Overview of GPS Modernization GPS Performance and Policy ● Accuracy, availability, integrity, SPS, PPS DoD & DoT policy, Anti-Spoof (A-S), encriyption, system status, applications evolution ● GPS Space Segment: How satellites and orbit data affect system operations. ● Orbital parameters, Kepler’s laws; ephemeris data Block I, II, IIA, IIR, IIR-M, IIF, III features
Overview ● Signal acquisition & processing ● Receiver system & hardware types ● System and hardware integration ● Augmentations & applications ● Getting the most out of your equipment
GPS Applications: Land ● GIS Development: Data Collection Demonstration ● Geographic Information System (GIS) needs, types ● What can it do for me? ● How does it typically operate? ● Aux. systems: laser, optical range finder, camera
Types of GPS Acquisition & Processing ● Post-processing: code, carrier phase ● Real-time: autonomous, DGPS code, DGPS carrier phase, assisted correction (E911) ● Data links, WAAS, OmniSTAR, StarFire, CORS, USCG ● Functionality and methods used for applications ● Review of different correction methods. How to implement and use each one. ● Accuracy levels and trade-offs
Point Position Georeferencing Example: How to Create a Corn Maze ● Georeference known earth points to a map to create an "amazing" working final product ● Geodetic point acquisition ● Map creation and georeferencing ● Application of results
GPS Constellation, Coverage and Performance: How satellite geometry affects receiver performance ● Dilution of Precision (DOP), visibility, analysis methods, operational results ● GPS Operational Control Segment (OCS): How OCS uploads & monitors the GPS constellation ● OCS network, functions, operation, vulnerabilities
Anatomy of a GPS Receiver System ● From the GPS satellite transmission antenna to data output; what happens in between? ● Transmission of GPS signals from spacecraft ● Atmospheric effects on signal, range loss ● User equipment: antenna, RF cable, GPS receiver, RF frontend, digital processing ● Processing, real-time DGPS corrections, user settings, data storage types, output information
GPS System Concept and Operation ● Position determination techniques; pseudoranging ● Signal structure, modulation, spectrum ● Pseudorandom noise (PRN) codes, C/A and P(Y) codes; GPS data message, format, data transmitted by S/C; correlation processing; signal acquisition; power levels, signal policy, pseudoranging navigation solution; velocity solution
GPS Receiver Hardware Types (with projection of receiver displays) ● Commercial GPS stand-alone receivers ● GPS boards, antennas, antenna pre-amps ● Differential receivers and accessories ● Data link equipment, coverage regions ● Survey receivers and software
Error Sources & Receiver Effects ● Systematic and random errors, tropospheric effects, dispersion; Ionospheric propagation effects ● AFGD ionospheric model; 2-frequency correction ● Multipath, mitigation techniques; error budgets; SPS and PPS signals and performance
Operations ● Equipment operation, observations ● Data, data logging, GPS analysis programs ● Post processing of data
Working Indoors to Test Your Equipment: ● GPS Signal Repeater and Hardware Techniques ● Equipment needed: antennas, amps, etc. ● Calculating gain and transmission distances ● Accuracies and hardwire connections ● Safety concerns, and RF emission regulations ● Installation guidelines
LUNCH IS ON YOUR OWN 12:00 – 1:30 PM
Introduction to DGPS ● Precision relative measurements ● Differential operation, common bias terms
5:00
GPS Receivers, Architectures and Equipment ● Receiver configigurations; types & performance ● Receiver block diagrams ● Carrier and code tracking loops ● Carrier smoothing, aiding ● Receiver sequence of operation, summary
Component Integration Principles: How to select and combine components to do your job efficiently and effectively ● Typical available components ● Integration guidelines ● Connectors, adaptors ● Power requirements, batteries, characteristics ● Commercial protocols ● Signal compatibility ● Typical projects ● Operating system examples ● Discussion: Bring in your tasks or problems!
Course Objectives
High accuracy GPS positioning provides users accuracies down to the centimeter level very effectively. Day one describes the basic concepts involved and the various receiver technologies and observables available to obtain high accuracy positions. Day two addresses the various errors affecting GPS and how to estimate many of them using simple field experiments. It also presents some fundamental aspects of estimation theory and describes the various DGPS methods and approaches with real-time implementation implications. Day three focuses on using GPS in a variety of applications environments with high-precision requirements. Numerous case studies are presented to illustrate the principles involved.
Prerequisites
New Signals and Systems: ● GPS Modernization, GLONASS, Galileo ● What will be available in the future? Practical Equipment Issues: How to make sure your GPS equipment gives you good results ● Things to consider before starting to work ● Troubleshooting problems in the field ● How to tell if you’re getting the results you need. ● What you can do yourself and when to call for help ● Help sources GPS Workshop on Applications: ● Attendees will form special interest groups to discuss a defined implementation/application problem for 30 minutes. Considerations: definition of needs, cost issues, COTS use, etc. ● Groups will develop a prototype system solution using GPS. Groups will present results and leas a discussion of results with the attendees. Informal interaction between attendees is planned and encouraged. Summary of Program ● Q & A, Discussion
Materials You Will Keep
An electronic copy of all course notes will be provided on USB Drive or CD. 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.
Instructor
Dr. Mark Petovello
A basic knowledge of GPS system operation is assumed, as well as familiarity with engineering analysis methods An understanding of GPS principles as in Course 122.
Who Should Attend
Engineers, scientists and others concerned with using differential GPS technology for achieving centimeter and decimeter positioning accuracies, and/or milliradian level attitude determination, in real time. Also for those involved in the development of high precision components and systems, as well as precision applications, in this rapidly evolving field. This is a fast-paced highly practical course that will prepare you to understand when and how to use the various methodologies available to you for covering different accuracy requirements.
To register or for more information, Contact Carolyn McDonald at (703) 256-8900 or cmcdonald@navtechgps.com.
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