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by Sandy Antunes
DIY Comms and Control for Amateur Space
Preface
Conventions Used in This Book
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How to Contact Us
1. Overview
Talking to Machines
Parts of a Comm System
Comm for the Impatient
Two Walkie-Talkies
Flatsat
Bidirectional Bench Test Hardware
Power, Range, and Licensing
Higher Power Licensing
Establishing a Ground Network
Breaking International Law
Housekeeping Data
Housekeeping: Bus and Instrument Are Separate
Alerts and Pages
Limits Displays: Green, Yellow, Red
Data Integrity
Requirements Checklist
Performance Requirements
Security & Anti-Jamming
Spacecraft Orbits
Frequency Allocation
Physical Constraints
Architecture Choices
Comparing a Space-Based Network to a Ground-Based Network
NASA’s Tracking and Data Relay Satellite System (TDRSS)
NASA’s Deep Space Network (DSN)
Near Earth Network
2. Radio
Transceiver Concepts
Wavelength and Frequency
Dual Band and Modulation
Doppler
Interference
ADC
Packets
APRS
Software-Defined Radio
3. Full Ground Station
Downlink Only
Operations Choices
Start with the Mission Payload
Comm Quantities
Ground Network
Ranging and Orbit Determination
Ground System Design Products
Mission Phases
4. Licensing
Overview
Extended Case: Private Comm Sat
Future Ideas
Regulatory Solutions
IARU
Smartphones
High-Altitude Ballooning and Guerrilla Radio
Demystifying the Basic Technology
Regulatory and Permissions
Ham Technician’s License
Scenarios
Safehold
Ground Sim
Software
Compare and contrast
Relays
Line of Sight/Direct to Ground
Relays
Private Networks
5. Orbits
Defining Orbits
The Six Classic Orbital Elements
TLEs
Orbit Determination
Time
Satellite Time
Ground Tracks
Contact Passes
6. Comm Budgets
Allocations
Data Priorities
Extended Example of Command via Text Messaging
More Realistic Bandwidth Allocation
Encoding
Link Budget
Units
Link Budget Equation
Going Deeper
Data Budget
7. Antenna Design
Antenna Shape
Common Spacecraft Antenna
Common Ground Station Antenna
Antenna Size and Frequency
Impedance and SWR
Antenna Materials
Power, ERP, and EIRP
8. Performance Characteristics
Data, Error Rates, and Availability
Security
Historical Satellite Hacking
9. Concept of Operations
ConOps
High-Level ConOps Design
Ops Center Network
Trending
Science Operations Center (SOC)
Science Monitoring
Handling Anomalies
A. Resources
Afterword
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DIY Comms and Control for Amateur Space
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