Is Anybody Out There The Search for Extraterrestrial Civilizations

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Is Anybody Out There?The Search for
Extraterrestrial Civilizations
Dan Werthimer University of California, Berkeley
http//seti.berkeley.edu/
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NOT FUNDED
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NOT FUNDED
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NOT FUNDED
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Porno in space FUNDED!
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Drake Equation

• NR fs fp ne fl fi fc L
• N number of communicating civilizations in our
  galaxy

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Planet Detection
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First Radio SETI

• Nikola Tesla (1899)
• Announces coherent signals from Mars
• Guglielmo Marconi (1920)
• Strange signals from ET
• Frank Drake (1960)
• Project Ozma
• one channel, 1420-1420.4 MHz

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Signal Types
1. Artifact (radio, radar, TV, ????) 2.
Deliberate (easy to decode, pictures, language
lessons)
First civilization we contact is likely to be a
billion years ahead of us.
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• Targetted Search Strategy
• Project Phoenix - Seti Institute
• Sky Survey Strategy
• Serendip, SETI_at_home - UC Berkeley
• Beta -
  Harvard
• Southern Serendip - Australia
• Meta II -
  Argentina
• Seti Italia -
  Bologna

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SETI Programs at the University of California
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Why SETI_at_home?

• Coherent Doppler drift correction
• Narrower Channel Width-gtHigher Sensitivity
• Variable bandwidth/time resolution
• Search for multiple signal types
• Gaussian beam fitting
• Search for repeating pulses

• Problem Requires TFLOP/s processing power.

Solution Distributed Computing
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The SETI_at_home Client
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SETI_at_home Statistics TOTAL
RATE
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Structure of SETI_at_home
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Web site 2 million hits/day 200,000
visitors/day (stats games popular
science less popular) 100,000 children,
families (including congress members and
their kids)gt 7,000 schools
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Gaussian Candidates
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BOINC

• Berkeley Open Infrastructure for Network
  Computing
• General-purpose distributed computing framework.
• Open source.
• Will make distributed computing accessible to
  those who need it. (Starting from scratch is
  hard!)

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Multi-Purpose FPGA-Based Spectrometer
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Pol. 1
Q
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Pol. 2
Q
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FPGA-Based Spectrometer

• 6U Compact PCI
• Power
• Cooling
• Robust/Reliable
• Hot Swapable
• Inexpensive

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• SETI Applications
• ALFA Sky Survey (300 MHz x 7 beams)
• Parkes Southern SERENDIP
• JPL/UCB/SI Survey (20 GHz Bandwidth)
• SETI Italia (Bologna)
• SONATA Cluster Driver
• SETI_at_home
• Astronomy Applications
• ALFA (GALFA, EGALFA, Pulsar) ?
• Pulsar Cluster
• ATA FX Correlator F Engine (Terabit/sec,
  PetaOp/sec)

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GALFA Spectrometer
Multipurpose Spectrometer Board
Quadrature Downconverter Board
-50 to 50 MHz
LPF
?
IF Pol. 1
100 MHz
sin
LPF
?
Decimate by 16
cos
FIR LPF
LPF
?
IF Pol. 2
e-i?t
Decimate by 16
100 MHz
sin
FIR LPF
LPF
?
e-i?t
cos
-50 to 50 MHz
12.5 Mhz Digital
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Spectrometer BoardAstronomy Signal Processor
EDT Driver Passive Rear-Mount Board
4 SERVERS w/ EDT Cards
Pol. 1
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4 Gb Ethernet Switches
Q
Pol. 2
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Q
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SERENDIP V Spectrometer
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Spectrometer Board SERENDIP V Application
Pol. 1
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Q
Pol. 2
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Q
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Filter Response PFB vs. FFT
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Biplex Pipelined FFTExample 8 pnt. FFT
Time Domain
Frequency Domain
Switch
Pol. 1
-4
-2
-1
Z
Z
Z
add
add
add
Coefficient Multiply
sub
Delay by N
sub
sub
-2
-1
-0
Pol. 2
-4
Z
Z
Z
Z
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Seti Haiku
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Searching for lifeAnswers are revealedAbout
ourselvesPaula Cook, Duke University
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One million earthlingsBounded by optimismLeave
their PCs onDan Seidner
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Seeking Students for Research

• Signal processing and Algorithms
• FPGA design
• System design (RF, IF, digital)
• Distributed computing

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Seti.berkeley.edu
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Our Generous Sponsors

• The Planetary Society
• The University of California
• Sun Microsystems
• Friends of SETI_at_home
• Marilyn and Watson Alberts
• Network Appliance
• Fujifilm
• IBM
• Quantum
• HP
• Xilinx

• The SETI Institute
• Informix
• EDT
• Netscreen
• Intel
• OReilly Associates
• SpaceSounds
• Dillon Engineering
• NAIC, Arecibo Observatory
• 4 million volunteers

Maybe, someday, the U.S. Government