Satcom

TCOM 750 Satellite Communications Fundamentals
Sept 15, 2004

Satellite RF Fundamentals

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Announcements
Tonight we will view a video on amateur radio satellite operations and discuss some concepts presented in the class notes. Next week: Perspectives on Winning Proposals
Guest Lecturer: Steve Trieber

Recommended URLs:
Surrey Space Centre: http://www.ee.surrey.ac.uk/SSC/ Surrey Satellite Technology LTD: http://www.sstl.co.uk SpaceQuest LTD: http://www.spacequest.com/ Space Systems Development Lab: http://ssdl.stanford.edu/ US Naval Academy Satellite Lab: http://web.usna.navy.mil/~bruninga/satstation.html

Satellite RF Fundamentals

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Team Rosters

TEAM 1 1 2 3 4 5 6 Naim Kassar Heng Fan Arpan Shah Mark Norton Kenneth Lim Dana Jaff

TEAM 2 David Davis Azzie Legesse Ayele Antenagegnehu Timothy Maier Shahid Nasim Padmanabhan Raman

TEAM3 Yingjie Hall Ravi Bhalotia Roger Ensminger Shelley Mountjoy Yang Liu Anouar Benahmed

Satellite RF Fundamentals

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Objectives
Refresh your knowledge of basic RF communications concepts related to the operation of spacecraft. Analyze how amateur radio satellite operations and methods can apply to our project.

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Satellite RF Communications Architecture
Geostationary Relay Satellite(s) Spacecraft Antenna Transmitter Data Instrument Space Link Sensor Space Link

OR

Receiver EARTH

Data to Processor Receiver

Data to Processor

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Subsystems of Satellite RF Communications
Pointing Loss Polarization Loss
Atmospheric Loss, Rain Loss

Space Loss

Pointing Loss

Transmitter

SPACE CHANNEL Galactic, Star, Terrestrial Noise

Receiver

Antenna

Antenna

Power Amplifier

Receiver Noise

Receiver

Transmitter

Modulator

Implementation Loss

Demodulator

Information Source

Information Sink
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Satellite transmitter-to-receiver link with typical loss and noise sources
Satellite RF Fundamentals...