Page 4 - Satellite Communications, Fourth Edition

Dennis Roddy iii

Contents

Preface xi

Chapter 1. Overview of Satellite Systems 1
1.1 Introduction 1

1.2 Frequency Allocations for Satellite Services 2
1.3 INTELSAT 4

1.4 U.S. Domsats 9
1.5 Polar Orbiting Satellites 12

1.6 Argos System 18
1.7 Cospas-Sarsat 19

1.8 Problems 25
References 26

Chapter 2. Orbits and Launching Methods 29
2.1 Introduction 29
2.2 Kepler’s First Law 29

2.3 Kepler’s Second Law 30

2.4 Kepler’s Third Law 31
2.5 Definitions of Terms for Earth-Orbiting Satellites 32
2.6 Orbital Elements 35

2.7 Apogee and Perigee Heights 37

2.8 Orbit Perturbations 38
2.8.1 Effects of a nonspherical earth 38
2.8.2 Atmospheric drag 43

2.9 Inclined Orbits 44

2.9.1 Calendars 45
2.9.2 Universal time 46
2.9.3 Julian dates 47

2.9.4 Sidereal time 49

2.9.5 The orbital plane 50
2.9.6 The geocentric-equatorial coordinate system 54