Transcript SKADS-LOGO - University of Cambridge

December 2010
AAVP schedule
AAVP Workshop
Milestone #
AA-low
AA-mid
Milestone date
AAVP Start
2010Q1
CoDR
2011Q1
AA element review
2011Q2
Element performance
Review
Front-end design
2011Q3
AAVS1 CDR
2011Q4
M6.1
AAVS1 PRR
2012Q2
M6.2
Start AAVS1 Construction
2012Q3
M6.3
Start AAVS1 Commissioning
2012Q4
M6.4
SKA1 Subsystem PDR
2013Q1
M6.5
AAVS2 PDR
2013Q2
M6.6
AAVS2 CDR
2013Q3
M6.7
AAVS2 PRR
2013Q4
M6.8
Start AAVS2 Construction
2014Q1
M6.9
TRR AAVS2
2014Q3
M6.9
Start AAVS2 Commissioning
2014Q4
M6.10
M6.11
PDR
(from draft
PEP)
Demonstrator in
2 Phases
CoDR Concept Design Review
CDR
Critical Design Review
PRR
Production Readiness
TRR
Test Readiness
2015Q2
SKA1 Subsystem PRR
Construction for SKA1
December 2010
AA Timeline
2015Q4
AAVP schedule
2016Q3
AAVP Workshop
Top design decisions......
Urgent (by CoDR April 2011)
Earlier
Consideration?
• Confirm specification in Memo 125:
– Frequency range, sensitivity ....
Immediate (by CDR, end 2011):
• Single or dual element?
• Demonstrable element in small array
Medium Term (by AAVS1, end 2013)
• Station size and configuration
• Core configuration
• Station system design
– digitisation, processing location, data flow
December 2010
AAVP schedule
AAVP Workshop
CoDR
• Scheduled for April 2011
• Flow down from System CoDR in February
Key
Science
Experiments
Physical
Parameters:
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•
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Instrument
Technical
Specification:
Flux density
Area of sky
Polarisation
Dynamic
range
etc
•
•
•
•
•
Operational
Constraints:
•
•
•
•
December 2010
Time
allocation
Storage
Power
Operations
budget
Sensitivity
Survey speed
Configuration
Stability
etc
Potential
Designs:
•
•
•
•
Collector type
Frequency
range
Data rates
etc
Modelling:
•
•
•
•
•
Variants
Performance
Cost
Power
Risk
SKA
Design
AA-CoDR considers
design(s) to progress
AAVP schedule
AAVP Workshop
Input for AA-CoDR
• Science requirements, principally:
–
–
–
–
Frequency range
Scan angle range
Polarisation performance
Performance prioritisation e.g.:
• Major part of frequency band
Fixed Cost trade-offs
• UV coverage : Sensitivity : Survey speed : Dynamic range etc
• Operational constraints:
– Power, time allocation, flexibility etc.
• Overall SKA process and structures – the review rules...
BUT: not starting from zero:
Memo 125, Pathfinders, demonstrators, studies etc.
An interactive process....
December 2010
AAVP schedule
AAVP Workshop
CoDR document lists e.g.:
Document Title
AA-CoDR
document
Description & work to be done for Ref.
AA-CoDR
§
2.1
Document Title
AA-CoDR
Description
& work to be done for AA-CoDR
Reference Documents
SKA Science Case
document
AA Review Documents
Reference
Describes overall SKA science
AA Programme
anticipation New document Describes the SKA context of the AAs reviews current
status of developments
Design Reference
Mission
Reference
Science for Phase 1
Reference
System Engineering
Management Plan
(SEMP)
Reference
Costing Strategy
Reference
Technology Roadmap
Reference
All System CoDR
documents
Reference
December 2010
Ref. §
2.1
Breakdown of science
AA system design New document
System design options, specification derivation and
Introduction and Executive summary
requirements and some technical
definition
1, AIP & Phase 2
2.1(b)
implementation considerations AA
forrequirements for Phase(Each
topic will normally have both AA-low and AA-mid
Technology discussion and choices to take forward.
2.1(a)
SKA2
subsections)
Plans
for
the
next
stage:
technical
schedule
and
focus
2.1(g)
The DRM for Phase 1. Being
management
aspects
A
3
A
New
document
Deployment
and operation
prepared for System CoDR.
High level system description
Description of the overall
development process
All other delta System CoDR
documents....
2.1(k)?
Implementation
Development timeline
2.1(g)
Technical requirements derived from science and
2.1(b)
trade-off discussion Deployment and operation overview
Appendix 1: SKADS report
2.1(a)
Performance parameter calculations
2.1(b)
Costing
trade-offs
Appendices 2 - 4: LOFAR, HERA (MWA & PAPER)
and and
2.1(a)
Block diagrams showing AA system context
2.1(c)
LWA reports
Deployment schedule considerations
2.1(e)
Projected
requirements
Hardware technologies
selectedpower
for progressing
Logistic planning
Power requirement discussion
2.1(h)
MTBF
and maintainability
issues 2.1(j)
Software requirements,
implementation
and tracking
discussion
Calibration & Graceful degradation considerations
Appendix 1: Draft detailed system requirement
specification (SRS)
Appendix 2: Draft requirements traceability matrix
Appendix 3: AA Risk register and mitigation approach
AAVP schedule
2.1(h)
2.1(h)?
2.1(g)
2.1(i)
2.1(i)
2.1(b)
2.1(f)
2.1(d)
AAVP Workshop
AAVS1 aims
Verify the fundamentals of the
proposed AA system design
• Test the element and array electromagnetics
• Forming well understood beams
• Evaluate details of the front-end
– Likely Trec(f)
– Testing matching with LNA over frequency
– Electronics designed for low RFI environment
– Understanding polarisation properties
– Checking array properties
Proving ground for AAVS2
December 2010
AAVP schedule
AAVP Workshop
AA-CoDR → AAVS1-CDR
• Development
• Simulation
• Select elements types
• Test devices
• Specify testing and AAVS1 environment
Do the work.....!
December 2010
AAVP schedule
AAVP Workshop
AAVS1-CDR
critical design review
• Scheduled for December 2011
• To approve design of AAVS1
AAVS1 broad characteristics....
• Common central facility for AA-low and AA-mid tests
• Only large enough to prove fundamentals for
electromagnetics and front-end
• Single station test
• On the chosen SKA site, assuming no delays
• Processing starting scaleability
December 2010
AAVP schedule
AAVP Workshop
Construction and Test
AAVS1
2012 Q3 – 2012 Q4
December 2010
AAVP schedule
AAVP Workshop
AAVS2 aims
AA-low: mass production test system
AA-mid: high dynamic range imaging demo.
• Ensure tooled components work properly for AA-low
• Next generation processing system evolution.
• AA-mid follows AA-low testing and continues to be
available as a system
Pre-production test for SKA1
December 2010
AAVP schedule
AAVP Workshop
AAVS2-CDR
critical design review
• Scheduled for Q3 2013
• To approve design of AAVS2
AAVS2 broad characteristics....
• AA-low: pre-production test for single, large station.
– Use tooled components. Particularly elements
• AA-mid: is an interferometer,
– small stations,
̶ full imaging perf.,
– limited “capability” (data rate)
• Common central facilities for AA-low and AA-mid
• Substantial system size
• On the chosen SKA site
December 2010
AAVP schedule
AAVP Workshop
AAVS2
Construction, and
Commission
Testing.....
2014 Q1 – 2014 Q4
2015
AA-mid: AAVS2 will
remain on site.....
December 2010
AAVP schedule
AAVP Workshop
SKA1 - PRR
Production Readiness Review
Q4 2015
Done.....!
December 2010
AAVP schedule
AAVP Workshop
December 2010
AAVP schedule
AAVP Workshop