australian ska pathfinder (askap) david r deboer atnf assistant director askap theme leader 06...
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Australian SKA Pathfinder (ASKAP)
David R DeBoer
ATNF Assistant Director
ASKAP Theme Leader
06 November 2007
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ASKAP Team
Australian SKA Pathfinder (ASKAP)
International collaboration led by Australia with Canadian, South African and Dutch partners.AUD$100M + in-kind
Dishes ~45 ~12-meter Max baseline 8 km Frequency 700 – 1800 MHz FOV 30 deg2
Bandwidth 300 MHz Resolution 5 kHz Channels 16k PAF 10x10x2 Data rate ~1TB/s/ant spectral line Tsys goal 35 K Station in NSW ~2500km baseline + VLBI
Australian SKA Coordination Committee (ASCC) is new “peak body” for SKA in Australia. Senior members from Commonwealth and Western Australia.
Australian SKA Pathfinder (ASKAP)
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CSIRO ASKAP: Australian SKA Pathfinder
2000
Sites short-listed ‘1% SKA’
Science
Sciencecase
published PrepSKA preparatory phase
activities
‘10% SKA’Science
98 2002 06 07 08 09 10 11 12 13 14 18 22
Feasibility studies and
concept demonstration
Full arrayconstruction100% SKA
SKAComplete
Phase 1construction
10% SKA
SKA Timeline
Reference Design selected
Pathfinder suite construction
External review of top-level design
Concept design
PrepSKA system design
Initial specs for Phase 1 and full SKA
Detailed Phase 1 design &top-level SKA design
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CSIRO ASKAP: Australian SKA Pathfinder
Boolardy
WA Midwest – Boolardy
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CSIRO ASKAP: Australian SKA Pathfinder
MRO
gazetted towns: 0
population: “up to 160”
WA Midwest
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CSIRO ASKAP: Australian SKA Pathfinder
CSIRO SKA R&D + ASKAP Funding
2001-2007 INITIAL SKA R&D FUNDING $20.5 Million
2007+ CSIRO & Aus Government funding for ASKAP 07-08 $16M08-09 $30M09-10 $33M10-11 $22M
>A$100 Million
+ In-kind from Canadian and South African partners
+ DEST funding of ~$5 Million to manage the full ‘SKA bid’
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CSIRO ASKAP: Australian SKA Pathfinder
Survey Telescope
ASKAP
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CSIRO ASKAP: Australian SKA Pathfinder
ASKAP Beamforming
Correlator/ Station BF
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CSIRO ASKAP: Australian SKA Pathfinder
ASKAP Beamforming
Correlator/ Station BF
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CSIRO ASKAP: Australian SKA Pathfinder
Key problems: data flow, processing, and storage
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CSIRO ASKAP: Australian SKA Pathfinder
Murchison Radio Observatory (MRO)S26 42 15 E116 39 32
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CSIRO ASKAP: Australian SKA Pathfinder
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CSIRO ASKAP: Australian SKA Pathfinder
The Long Road
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CSIRO ASKAP: Australian SKA Pathfinder
MRO
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CSIRO ASKAP: Australian SKA Pathfinder
MRO
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CSIRO ASKAP: Australian SKA Pathfinder
MRO
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CSIRO ASKAP: Australian SKA Pathfinder
MRO Protection
• Observatory grounds (120 km2)• Full/self-control
• EMC control region (30 km radius)• No inhabitants• Control, but negotiation with pastoral activities
• Radio Astronomy Park (70 km radius)• “Technology Park” legislation for development control• Coordinated control
• ACMA RALI• (Aus Communication & Media Authority Radiocommunications
Assignment and Licencing Instruction)• “FCC RQZ” protection (various radii)
• Section 19• Large region limiting mining activity (no new mines in the
region)
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CSIRO ASKAP: Australian SKA Pathfinder
RALI
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CSIRO ASKAP: Australian SKA Pathfinder
RALI
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CSIRO ASKAP: Australian SKA Pathfinder
RALI
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CSIRO ASKAP: Australian SKA Pathfinder
RALI
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CSIRO ASKAP: Australian SKA Pathfinder
May 2007 Heritage Survey
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CSIRO ASKAP: Australian SKA Pathfinder
System Block Diagram
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CSIRO ASKAP: Australian SKA Pathfinder
Antenna
Imaging dynamic range & pipeline processing implies fixed parallactic angle & stable field
“Sky mount” prime focus with upgrade paths
Composite (DRAO) or metal (industry)
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CSIRO ASKAP: Australian SKA Pathfinder
Antenna
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CSIRO ASKAP: Australian SKA Pathfinder
Smart Feed - Phased Array Feed (PAF)
Phased array in focal plane of antenna
Linear-connected “checkerboard” feed looks promising
Roughly 10x10x2 elements and ~1-meter
NTD testing
Testbed antenna at Parkes
Drives antenna design
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CSIRO ASKAP: Australian SKA Pathfinder
Receivers/Data Transport
High-Z, differential low-noise amplifiers
~3:1
Up-conversion
Analog fiber to BF
Receiver-on-a-chip
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CSIRO ASKAP: Australian SKA Pathfinder
Beamformer/Correlator/Station beamforming
PAF BeamformerCorrelator/station beamformer
~30 1 sq. deg. beams
Flexible weights to optimize
All beams to give ~30 sq deg at 1400 MHz
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CSIRO ASKAP: Australian SKA Pathfinder
From ASKAP to SKA….
ASKAP – 1% Pathfinder
SKA P1 – 10% Pathfinder
SKA
Number 12 m dishes
45 500 5000
Frequency Range
0.7 – 1.8 GHz 0.3 – 10 GHz 0.3 – 22 GHz
Number of receivers
9,000 200,000 1,000,000
Bandwidth 0.3 GHz 2 GHz 4 GHz
DSP Processing
30 Teraflop 6,000 Teraflop 200,000 Teraflop
Computer Processing
2 Teraflop 1,200 Teraflop 24,000 Teraflop
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CSIRO ASKAP: Australian SKA Pathfinder
MRO - 02 8314 9699
coolinghttp://www.atnf.csiro.au/projects/askap/
http://www.ska.gov.au