Aims

To introduce the basic principles of positioning using the Global Navigation Satellite Systems (GNSS) with special emphasis on Positioning System (GPS).

This module will introduce the basic principles of positioning using the Global Positioning System (GPS). Special emphasis will be placed on high precision positioning.

Outline Of Syllabus

Introduction and orbit review
Normal orbits and Kepler's laws
Perturbed orbits and ephemerides
GPS description and signal structure
The pseudorange observable
Pseudorange point positioning
Differential positioning
The carrier phase observable
Relative positioning and differencing techniques
Computation of relative position
Ambiguity resolution techniques
Error sources in GPS I
Error sources in GPS II
Modes of GPS positioning
Third party products
Instruments, applications, field procedures and observation processing
Future directions

Teaching Rationale And Relationship

The lecture series is designed to impart theoretical knowledge, understanding and skills which are supported and developed by focussed practical sessions. A structured reading list allows students to manage their learning patterns and provides the opportunity to increase their depth of learning. Team working and problem solving are practiced and assessed.

The one small group teaching activity provides the opportunity for students to explore, in a directed way, the use of internet based GNSS positioning services. Specifically, issues relating to common pitfalls in use are explored e.g. coordinate datums and reference frames. Fieldwork allows students to expand their skill base in practical GNSS surveying and consolidates underlying theory delivered in lectures.

Alternative will be offered to students who are unable to be present in person.

Students should consult their individual timetable for up-to-date delivery information.

Assessment Rationale And Relationship

The specialist knowledge and understanding acquired during this module are assessed by means of an unseen written examination, database processing, computation, data interpretation and student reflection. Specific coursework submissions will allow the student to demonstrate their ability to report on and synthesise practical work.