GNSS Positioning
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Streamable MP4/PDF
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USB MP4/PDF
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Agenda
Webinar instructions will be emailed before the date of the webinar.
Please log into the webinar 15 – 30 minutes before start time.
Tuesday, July 26, 2022
8:30 am – 3:20 pm CDT
Presented by
Dr. Thomas H. Meyer Ph.D.
Agenda
Introduction and History
History of satellite-based navigation/positioning
• SPUTNIK I, Transit, GPS, NAVSTAR
Terms and nomenclature
• GNSS, GPS, space vehicle (SV),
GNSS system architecture (segments)
• Control segment, monitor stations, master control station
Principles of system operation
Current status of GNSS
• Number of SVs and operational status, benefits and drawbacks
GNSS Positioning Orbits and Ranging
Ranging overview
• Trilateration
Positioning equations
• Range equation 2-D, Range equation 3-D, 3-D Trilateration
Orbits
• Determining position of SV’s, ephemeris, satellite laser ranging (SLR)
Time
• Kepler’s Laws of Planetary Motion, elapsed time = range
• Time bias
Code-based ranging
Carrier phase-based ranging
Timing Codes and Carrier Phase
Waves and GPS: signal structure
• Terminology: frequency, channel, band, five frequencies: L1-L5, L1c and L2c
• L-Band, GPS Bands
Timing codes
• C/A-Code and P-Code, code phase, timing code chips = clock ticks, psuedorange
Ranging by carrier phase
Interferometry
Integer ambiguity
Geodesy and GNSS
Control coordinates from CORS
Terminology: phase center, phase center offset
Antenna calibration
Position and velocity
• Antenna reference point
NAD27, NAD83, WGS84
Tectonic plate motion
GNSS Accuracy and Precision
Precise point positioning (PPP)
Differential GPS (DGPS)
Phase differencing
Static vs. kinematic
Continuously operating reference station (CORS)
Real-time positioning
Real-time Kinematic (RTK)
Advanced continuously operating reference network (ACORN)
Practical considerations
Webinar Instructions
All attendees must log-on through their own email – attendees may not watch together if they wish to earn continuing education credit. HalfMoon Education Inc. must be able to prove attendance if either the attendee or HalfMoon Education Inc. is audited.
Certificates of completion can be downloaded in PDF form upon passing a short quiz. A link to the quiz will be sent to each qualifying attendee immediately after the webinar. The certificate can be downloaded from the Results page of the quiz upon scoring 80% or higher.
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Windows 7 – 10 or Mac OSX Mavericks (10.9) – macOS Catalina (10.15)
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Internet Explorer v11 (or later) with Flash enabled
Internet connection: Minimum of 1Mbps Hardware: 2GB RAM or more
For more information, visit the Support section at www.gotowebinar.com
Credits
Professional Engineers:
6.0 PDHs
Land Surveyors:
6.0 PDHs (in Most States)
Continuing Education Credit Information
GNSS Positioning
This webinar is open to the public and offers 6.0 PDHs/continuing education hours to engineers licensed in most states, and 6.0 PDHs to land surveyors licensed in most states.
This educational activity has been evaluated and accredited by The Practicing Institute of Engineering for 6.0 PDHs. It is deemed approved for New York engineers and land surveyors via this accreditation (Regulations of the Commissioner §68.14(i)(2)).
HalfMoon Education is an approved continuing education sponsor for engineers in Florida (Provider No. 0004647), Indiana (License No. CE21700059), Maryland, New Jersey (Approval No. 24GP00000700) and North Carolina (S-0130).
HalfMoon Education is an approved continuing education sponsor for land surveyors licensed in Indiana (License No. CE10600325), Maryland and North Carolina (S-0130).
The Florida Department of Agriculture and Consumer Services has assigned this course number 10185 for surveyors.
The Tennessee Board of Examiners for Land Surveyors has approved this course for 6.0 PDHs.
This course has been submitted to the Missouri Board for Architects, Professional Engineers, Professional Land Surveyors and Professional Landscape Architects for 6.0 PDUs; approval is currently pending.
HalfMoon Education is not seeking course approval for New Jersey or Delaware land surveyors.
Visit this course listing at www.halfmoonseminars.org for updates on pending credits. Completion certificates will be awarded to participants who complete this event and earn a passing score (80%) on the quiz that follows the presentation (multiple attempts allowed).
Speakers
Dr. Thomas H. Meyer, Ph.D.
Professor of Geodesy, University of ConnecticutDr. Meyer is a professor in the Department of Natural Resources and the Environment at UConn’s College of Agriculture, Health and Natural Resources (CAHNR). He is a member of the American Society of Civil Engineers and the American Society for Photogrammetry and Remote Sensing, and he is a fellow and past president (2016, 2019) of the American Association for Geodetic Surveying. Dr. Meyer is a past president (2006-2007) of the Geomatics Society of New England (previously known as the New England Section ACSM) and a member of the editorial boards of the Journal of Surveying Engineering and Surveying and Land Information Science. Dr. Meyer earned his Ph.D. degree from Texas A&M University (College Station, 1998) where he was a research associate in the Mapping Sciences Laboratory. He was named a UConn Teaching Fellow (2015), and he has taught geomatics courses at the graduate and undergraduate levels in geodesy, geographic information science, digital terrain modeling, spatial statistics, and global navigation satellite system surveying. Dr. Meyer has authored an undergraduate-level geodesy textbook and numerous peer-reviewed papers about surveying and mapping, and he teaches professional education seminars for surveyors throughout New England and the United States.