Australian SKA Pathfinder (ASKAP) David R DeBoer ATNF Assistant Director ASKAP Theme Leader 06...

Australian SKA Pathfinder (ASKAP)

David R DeBoer

ATNF Assistant Director

ASKAP Theme Leader

06 November 2007

ASKAP Team


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.


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


Boolardy

WA Midwest – Boolardy


MRO

gazetted towns: 0

population: “up to 160”

WA Midwest


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’


Survey Telescope

ASKAP


ASKAP Beamforming

Correlator/ Station BF


ASKAP Beamforming

Correlator/ Station BF


Key problems: data flow, processing, and storage


Murchison Radio Observatory (MRO)S26 42 15 E116 39 32



The Long Road


MRO


MRO


MRO


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)


RALI


RALI


RALI


RALI


May 2007 Heritage Survey


System Block Diagram


Antenna

Imaging dynamic range & pipeline processing implies fixed parallactic angle & stable field

“Sky mount” prime focus with upgrade paths

Composite (DRAO) or metal (industry)


Antenna


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


Receivers/Data Transport

High-Z, differential low-noise amplifiers

~3:1

Up-conversion

Analog fiber to BF

Receiver-on-a-chip


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


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


MRO - 02 8314 9699

coolinghttp://www.atnf.csiro.au/projects/askap/

http://www.ska.gov.au

http://www.atnf.csiro.au/projects/askap/

http://www.ska.gov.au/

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Australian SKA Pathfinder (ASKAP) David R DeBoer ATNF Assistant Director ASKAP Theme Leader 06...

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