tailieunhanh - Basics of the GPS Technique: Observation Equations

The purpose of this paper is to introduce the principles of GPS theory, and to provide a background for more advanced material. With that in mind, some of the theoretical treatment has been simplified to provide a starting point for a mathematically literate user of GPS who wishes to understand how GPS works, and to get a basic grasp of GPS theory and terminology. | Basics of the GPS Technique Observation Equations Geoffrey Blewitt Department of Geomatics University of Newcastle Newcastle upon Tyne NE1 7RU United Kingdom Table of Contents 1. 2. GPS The Basic The GPS The GPS 3. THE PSEUDORANGE Code Autocorrelation Pseudorange Observation 4. POINT POSITIONING USING least Squares error 5. THE CARRIER PHASE Carrier Phase Observation differencing 6. RELATIVE POSITIONING USING CARRIER selection of Baseline solution using double Stochastic 7. INTRODUCING HIGH PRECISION GPS High Precision Sources of data and 8. Copyright 1997 by the author. All rights reserved. Appears in the textbook Geodetic Applications of GPS published by the Swedish Land Survey. 1 2 GeoffreyBlewitt Basics of the GPS Technique 1. INTRODUCTION The purpose of this paper is to introduce the principles of GPS theory and to provide a background for more advanced material. With that in mind some of the theoretical treatment has been simplified to provide a starting point for a mathematically literate user of GPS who wishes to understand how GPS works and to get a basic grasp of GPS theory and terminology. It is therefore not intended to serve as a reference for experienced researchers however my hope is that it might also prove interesting to the more advanced reader who might appreciate some easy reading of a familiar story in a relatively short text and no doubt from a slightly different angle . 2. GPS DESCRIPTION In this section we introduce the basic idea behind GPS and provide some facts and statistics to describe various aspects of the Global Positionining System. The .