Course 217: Introduction to Differential GPS

All course materials this year will be provided in a more portable,
secure electronic PDF format. We've heard your requests to lighten the
weight of travel home by eliminating heavy, spiral bound paper notebooks.
We want to provide a more dynamic & beneficial experience for all tutorial/course attendees. On-the-fly notations can be typed during your class using
the "Sticky Note" feature of Acrobat Reader 9 (provided for your convenience).
A laptop is required.

Take your notes To-Go and have them wherever you go.

Thank you to all attendees for your continued support and feedback over the past 25 years!

Instructor	Dr. Chris Hegarty, MITRE
Objectives	• To provide an intensive overview of DGPS system design and operation concepts. • To provide a background in DGPS system test and evaluation theory and techniques. • To provide some of the latest applications and test results using DGPS. • To present representative DGPS implementations for aviation, space, land and marine.
Prerequisites	Familiarity with GPS and basic receiver operation, such as that provided by NavtechGPS Course 111 or Course 122. Familiarity with engineering terms and data representation.
Course Schedule	8:30 - DGPS Overview Local-area, regional-area, wide-area architectures Code vs. carrier phase based systems Pseudolites Performance overview 9:45 - Differential Error Sources Satellite ephemeris errors Satellite clock errors Selective availability Ionospheric and tropospheric delay Multipath Receiver internal noise and biases 11:00 - Observable Modeling Code pseudorange and carrier phase outputs Code-minus-carrier observables Carrier smoothed code operation Double difference operation System error budgets 12:00 - Lunch on your own 1:30 - DGPS Design Considerations Range vs. navigation domain corrections Data links; Pseudolites Reducing major error components Ambiguity resolution 2:45 - DGPS Case Studies I RTCM SC104 message format USCG maritime DGPS and National DGPS (NDGPS) Commercial satellite-based systems 4:00 - DGPS Case Studies II Wide Area Augmentation System (WAAS) Local Area Augmentation System (LAAS); pseudolites RINEX format CORS network for precise positioning (survey) Precise time transfer 5:00 - Course Ends
Continuing Education Units	0.6 (6 hours)
Materials You Will Keep	• A USB Drive with PDF electronic course notes used during the course. Bringing a laptop is highly recommended; power access will be provided. • A copy of the following text: The Global Positioning System, Vol. IV, ION Monograph, 1993. Return to top of page