Transcript DVA Context & DVP Goals Washington, DC P. Dewdney Apr 15, …

DVA1 as Part of the Dish
Verification Program (DVP)
Washington, DC
P. Dewdney
Jun 4, 2010
System Hierarchy (Part 1)
SPDO
SKA User
System
Telescope
Dish
Cryo
WBSPF
Feed
Receptors
PAF
Receivers
LNA
Feed
elements
Beamformer
LNA
To
Figure
B
People
Sparse AA
Array
(Low)
DVP
Dish
Array
L7
User System
Sparse AA
Array
(High)
Beam
management
Receptors
Feed
elements
LNA
Beamformer
L6
System
L5
Elements
Dense AA
Array
Beam
management
Receptors
Feed
elements
Beam
former
L4
Sub systems
Beam
management
L3
Assemblies
LNA
L2
Sub-assemblies
L1
Components
L0
Parts
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Dish Verification Program (DVP)
SPDO
•
Process to verify performance of dishes for the Dish
Array in the System Hierarchy.
– Element level.
•
Dishes equipped with well defined interfaces to other
system elements:
–
–
–
–
•
Power
Signal transport
Monitor and Control
Other infrastructure
Verified to be capable of handling all feeds and
receivers needed to carry out the dish-based science.
– May not be so-equipped at initial roll-out.
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Dish Sub-System
SPDO
SKA Dish Antenna
a
n
e
Monitor &
Control
Timing &
Synchronisation
Front Ends
Antenna
Foundation
RF and
Digital
System
Local Power
Sub-system
External Signalling
Interfaces
Sp
E
it al
lo p
e
v
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DVP Goals
•
Risk reduction
SPDO
– When built up into the SKA system, show that dishes will meet all the
science requirements;
– Also meet all other requirements needed to integrate into a system and
operate in the field.
•
Design, produce and test one or more SKA antennas;
– with the greatest system sensitivity (Ae/Tsys and/or Survey Speed) per
unit system cost (total cost of ownership);
– As well as possible, ensure that the contribution of antenna-related
systematic errors is within acceptable limits;
– Designs/testing programs converging to a detailed design that is
manufacturable in production quantities.
•
•
Understand the costs.
Converge to a production-ready, documented antenna
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design (production data-pack).
DVP Work Flow
SPDO
Manufacturability
Up-Front
Requirement
New Prototype
Design
Prototype Antenna
Construction
Single-Antenna
Tests
First Level
Qualification
Tests
Time-Dependent,
Parameterised
Behaviour Model
Develop
Performance Model
DVA-1
CPG
Estimate Key
Antenna
Specifications
In conjunction
with well
understood 2-D
array.
Deep
Verification &
Modelling Tests
System Model
Required
System Performance
Analysis & Model
Development
Minor Antenna
Modifications
Track Costs
Highest
“affordable”
quality
Adjustments to Model
Production
Design
Yes
OK?
No
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The SPDO Role in DVA1
•
Oversee the program as part of the DVP.
SPDO
– Carry out DVP design reviews.
•
•
Set specifications for the antenna that optimize overall
SKA performance and cost.
Set acceptance/test criteria for the completed
antenna.
– Development of specifications and tests are done by the
SPDO in collaboration with the groups actually carrying out
the design/construction of the DVA antenna.
– The DVA antenna will be accepted by the SPDO,
representing the SKA.
 Note that ownership is a different matter.
•
Continued evaluation and testing of this antenna will
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continue beyond the TDP programme.
Time Scale
SPDO
2009
2010
2011
2012
2013
2014
2015
2016
Detailed Design, Prod. Eng
& Tooling
SKA Preparatory Phase
2017
2018
Phase 1 Construction, Verification, Commissioning, Acceptance,
Integration & First Science
Phase 2 …..
REV
Science
REV
REV
REV
Science / Engineering tradeoffs
DRM Development
Phase 2 Science Development
Revision of Science Case
Early Science Proposals
Refinement of Early Science
REV
CoDR
PDR
SRR
System
Engineering
Definition and Design
CoDR
Dishes
DVA1
Dish Prototype
Fabrication
Dish Sub-Sys.
Definition
Concept Definition
Dishes, AAs
Concept Definition AAs
AA Sub-Sys.
Definition
AAVS2 development and testing
PDR
CDR
SRR
Factory Assembly, Integration and Testing
Purchase or
Fabrication
PDR
Sub-System Definition
Data Storage
Phase 2 Continuation
PR
Factory Assembly, Integration and Testing
Site Assembly, Integration and Testing
Detailed Design
Phase 2 Correlator Design
Temporary Software Correlator
Pulsar and Transient Processor
Monitoring & Control
Phase 2 Continuation
Site Assembly, Integration and Testing
CDR
Preliminary Design
SRR
Software Requirements Definition
Preliminary high level architecture
Phase 2 Continuation
AAVS2 demo
Hardware Correlator Early Fabrication
Beamformer and Correlator
Phase 2 Continuation
PR
Detailed
Design
Front End and Channeliser
Imaging Concept
Factory Assembly, Integration and Testing
Tooling and Early
Fabrication
CDR
Preliminary
Design
CoDR
Software &
Computing
PDR
Prototype AAVS1
Testing
Sub-System Definition
CoDR
Signal
Processing
PR
Site Assembly, Integration and Testing
SRR
Concept definition
CDR
DVA2 development and testing
See
Next
Slide
Phase 1 Verification and Commisioning
Continuous Performance Evaluation
DVA1
Prototype Dish Testing
AA Prototype
Fabrication
CoDR
Signal transport
& Networks
Phase 1 Systems integration
Phase 1 System Testing
Continued System Engineering for Phase 2
PDR
SRR
CoDR
Aperture
Arrays
CDR
System refinement, change management
DVP
SRR
Shared Risk Science Operations
REV
PDR
Refine high level architecture
Preliminary Design
CDR
Detailed Design, Coding, Integration with platforms
and testing
Phase 1 Refinement and Roll-out
On-site Testing
S/W Development & Roll-out for Phase 2
PDR
RFI Monitoring
RQZ
Site characteristics
Atmospheric studies
Configuration studies
Continued RFI and Tropo Monitoring
Remote Station Land Acquisition &
Environmental Studies
report
Site
Engineering
CDR
CDR
Central Data Processing Facility
Site Acceptance tests including RFI qualification
Science Computing Facility
Infrastructure Detailed Design (fibre & power)
Infrastructure Detailed
Design (buildings)
Phase 2
Continuation
Ops and Maintenance Facility
Antenna Foundations and Trenching Roll out
CoDR
Project
management
PrepSKA
Plan
SKA Scope definition
WBS, resource allocation
PDR
CDR
PM Plan
&
Schedule
Final SKA Deployment Plan
Project execution, monitor and control
Project staffing & development
Milestones
Baseline design
for Phase 1
Rev 7a
2010-04-13
2009
2010
2011
Phase 1
construction
approval
Costed
system design
Site decision
2012
2013
Start of Phase 1
Construction
2014
2015
Baseline design for
Phase 2
2016
2017
Start of
Phase 2
Construction
2018
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Time Scale
SPDO
2009
2010
2011
2012
2013
SKA Preparatory Phase
CoDR
Dishes
Concept
Definition
PDR
SRR
Dish Sub-Sys.
Definition
DVA1 Prototype
Fabrication
2014
2015
2016
Detailed Design, Prod. Eng
& Tooling
DVA1
Prototype Testing
Phase 1
Construction
CDR
DVA2 development and testing
PR
Tooling and Early
Fabrication
Milestones
Baseline design
for Phase 1
Rev 7a
2010-04-13
2009
2010
2011
Phase 1
construction
approval
Costed
system design
Site decision
2012
2013
Start of Phase 1
Construction
2014
2015
2016
• Review dates are preliminary.
• Need to rationalize the work flow and reviews (TBD).
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End
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