Geographical Positioning System (GPS) what is the function?

5/7/98


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Table of Contents

Geographical Positioning System (GPS) what is the function?

Geographical Positioning System

GPS requires at least 4 Satellites

The More Satellites … the better

What one satellite tells you

Two Satellites

Two dimensional positoning

We have been “found”

Satellites Come and Go

Satellite location from Trimble

Position Dilution of Precision

Trimble Pro XL Receiver

How Uncorrected Data Looks

Base Station is a “fixed point”

Differentially Corrected Data

SELECTIVE AVAILABILITY

Differential GPS

Summary of Error Sources

Las Cruces Base Station

Can other Base Stations be used?

Albuquerque Base Station

Author: Dr. D Briggs