LESSON 5
NAVIGATIONAL SATELLITE AND TIMING GLOBAL
POSITIONING SYSTEM
OVERVIEW
LESSON DESCRIPTION:
In this lesson, you will learn to identify the different techniques of GPS.
TERMINAL LEARNING OBJECTIVE:
ACTION:
You will identify the different signals that support the surveyor.
CONDITION:
You will be given the material contained in this lesson, a number 2 pencil, and a
calculator.
STANDARD:
You will correctly answer all practice questions following this exercise.
REFERENCES:
The material contained in this lesson was derived from FM 3-34.331.
INTRODUCTION
This chapter provides a general overview of the basic operating principles of the NAVSTAR GPS. The
NAVSTAR GPS is a passive, satellite-based navigation system operated and maintained by the DOD.
Its primary mission is to provide passive global positioning or navigation for air-, land-, and sea-based
strategic and tactical forces. A GPS receiver is simply a range-measurement device. Distances are
measured between the receiver antenna and the satellites, and the position is determined from the
intersections of the range vectors. These distances are determined by a GPS receiver, which precisely
measures the time it takes a signal to travel from the satellite to the station. This measurement process is
similar to that used in conventional pulsing marine-navigation systems and in phase-comparison EDM
land-surveying equipment.
5-1
EN0593
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