Module 2 : Global Positioning System
  Lecture 8 : More on GPS principles
 Principles of position fixing with GPS
The following concepts will be discussed here:

a) Pseudoranging
b) Carrier phase
c) Point positioning
d) Relative positioning

  • Basic principle of position fixing is that of resection in surveying.
  • Mainly two types of position fixing are used in GPS measurements:
    • Positioning by pseudoranging
    • Positioning by carrier phase measurements