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Index
Satellite Communications Physics
Foreword
Contents
Introduction
part 1 Satellite Communications
Why Do We Bother With Satellite Communications?
What a Communications Satellite Can Do
The Road to Successful Satellite Communications
What About the Future?
Project Telstar
What Project Telstar Was Designed To Do
The Telstar I Satellite—Outside
The Telstar I Satellite—Inside
Ground Stations for Satellite Communications
The Satellite Goes Into Orbit
The Second Telstar Satellite
How the Telstar Satellite Works
Some Big Problems in Satellite Communications
Types of Satellite Orbits
part 2 Satellite Communications Case Histories
Six Typical Problems
At the Foundation: Basic Physical Principles
Problem-Solving Techniques
CASE HISTORY NO. 1 How Do We Calculate a Satellite’s Orbit?
THE PROBLEM
How We Track Satellites
The Basic Physics of Satellite Motion
Calculating the Orbit of Echo I
Calculating the Orbit of Telstar I
CASE HISTORY NO. 2 What Color Should a Satellite Be?
THE PROBLEM
The Radiation of Heat
Absorptivity and Emissivity
How We Measure the Radiation of Heat
Finding the Right Surface for Telstar
CASE HISTORY NO. 3 How Can We Make Optical Measurements on a Satellite?
THE PROBLEM
Why We Want to Know About the Spin Axis
Ways of Measuring the Spin Axis
Locating the Mirrors on the Satellite
How We Record Flashes from the Mirrors
Results
CASE HISTORY NO. 4 How Do We Keep Solar Cell Power Plants Working in Space?
THE PROBLEM
Organizing the Work
Technical Background on Solar Cells
Finding Out About Radiation Damage
Designing and Making the Best Solar Cells
Mounting the Cells on the Satellite
CASE HISTORY NO. 5 Would Time Delay Be a Problem in Using a Synchronous Satellite?
THE PROBLEM
How a Synchronous Satellite Would Work
The Effects of Time Delay
The Echo Problem
Experimenting With Pure Delay
Designing the Experiment
What Should We Observe?
The Results and What They Mean
Length of Time Before Seven Pairs of Talkers Could Detect 1.2 Seconds of Delay
CASE HISTORY NO. 6 How Can We Repair an Orbiting Satellite?
THE PROBLEM
The Telstar Command Circuit
The Fifteen Telstar Commands
What Went Wrong With Telstar I
Looking for the Trouble Spot
The Villain: Radiation
Fooling the Decoder
Removing the Ionization
Back to Normal—For a Time
A Final Note to the Reader
Suggested Reading
Satellite Communications
Project Telstar
Satellite Communications Case Histories
The Editor
Footnotes
Transcriber’s Notes
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