Post on 19-Jan-2020
Laurent Gizon (PDPM) and PLATO Mission Consortium 3 Dec 2014, Taormina
Outline
• PLATO science data products • PDC structure, responsibilities, interfaces • PDC project office and wiki • Issues, timeline, ongoing work
PLATO DATA CENTRE
2+4 min = 6 7 min = 4 2 Min = 2 4 Min = 5 = 19 min =13
PLATO Ground Segment (PGS) • Mission Operations Center (MOC, flight-critical) • Science Operations Center (SOC, mission-critical) • PLATO Data Center (PDC, science-critical) • Science Preparatory Activities (scientific
specification of software)
• The PDC is in charge of the validation, calibration, processing of the PLATO observations.
• The PDC delivers the final PLATO science Data Products to the SOC. • PSPM provides the scientific specification of algorithms that run at the PDC.
Data Levels • Telemetry baseline: 109 Gb/day (8.7 Mb/s during daily 3.5hr window)
• Level 0: Depacketized light curves and centroid curves plus selected imagettes; for each telescope (32 NT@25s + 2 FT@2.5s). +House keeping data (temps, instrument status, pointing angles)
• Level 1: Calibrated light curves and centroid curves for each star (science-ready). Instrumental corrections, such as CCD gain corrections and jitter correction. Analysis of imagettes to validate and optimize performance of on-board treatment. FT are used for fine guidance and navigation.
• Level 2: PLATO science Data Products, processed by the PDC using algorithms specified by the PSPM
PLATO Science Data Products
L2DP6Confirmed planetary systems and their characteristics
L2DP5Stellar masses and ages
L2DP4Stellar rotation and activity
L2DP3Asteroseismic mode parameters
L2DP2Planetary transits and their parameters
L1DP1Calibrated light curves and centroidcurves
For most stars For most cool stars For cool stars with mV<11
Rp/Rs from transits Rs from Gaia Mp/Ms from RV Ms/Rs^3 from seismo Age from seismo
Data Policy (baseline from 2011)
• L1 data will be publicly available by the SOC once they are validated by the SOC, following a procedure to be defined by the PST (days to a few months)
• L2 data (depend on additional observations) will be made publicly available by the SOC in a timely manner, and no later than the acceptance for publication of the first refereed papers based on them.
• Baseline: Following a call for proposals, a small number of targets will be exclusively available to the PLATO-involved scientists (i.e. members of the PMC, the PST, and ESA scientists) for a period of one year after the corresponding L1 data have been validated and made available to them by the SOC
• Issue to be worked out: data policy wrt follow-up observations
PDC Work Breakdown Structure (Top-Level)
Preparatory & FU DB Management
12 countries involved ~ 200 work packages 55M (26M) cost to launch
System Architecture & Management: WP31 Coordinator is Raymond Burston (MPSSR)
Designs and manages data structure, data flow, and data integrity
Two main PDC processing cycles: Two-weekly cycle. Triggers downlink of the imagettes of cand ida te p lane ts and triggers ground-based follow-up of objects of interest. A full update of the science data products will be made available every three months.
Data Processing Algorithms: WP32 Coordinator is Réza Samadi (LESIA) Definition of on-board & on-ground data treatment algorithms (up to L1)
• Telemetry: 109 Gb per day (3.5 hr per day, each day, 8.7 Mb/S) – Light curves and centroid curves for all 32 NT and 2 FT – Imagettes: 6x6 pixels for NT (several 1000) and 9x9 pixels for FT (40) – House keeping (e.g. temperatures and voltages)
• Smearing (trailing) – board • Background (sky background, scatter light) – board • Confusion (pollution due to the contaminants) – board (masks) • PSF modeling across the field (using imagettes) – ground • Differential aberration - board & ground (relativistic effect on star line of sight) • Outliers (glitches, proton impacts) - board & ground • Satellite Jitter – ground • Flux calibration – ground (gain of the electronic chains, quantum efficiency of CDDs)
• Long-term effects – ground (CCD ageing effects, long term temperature variations)
Instrumental and environmental effects and their correction, leading to L1
Data Processing Development Support: WP33 Coordinator is Laurent Gizon (MPSSR)
In collaboration with ESAC (Larry O’Rourke), WP33 turns algorithms from WP32 into core-processing software that will run at the SOC. • Requires a good understanding of system interfaces with SOC
and operational procedures • Compliant with ECSS standards for development, product
assurance, management and all the compliant standards
Input Catalogue: WP34 Coordinator is Paolo Giommi (ASDC) Technical support for Target/Field Characterization and Selection (WP13) to generate the PLATO Input Catalogue; WP34 delivers the validated PIC to the PDC-DB
The Input Catalog includes
• Basic information about targets • Including list of contaminants • Cross-match reference tables
for targets and contaminants
Giampaolo Piotto -- TALK
Preparatory and FU DB Management: WP35 (ex-Ancillary Database Management)
Coordinator is Magali Deleuil (LAM) • Assembles and formats preparatory and follow-up
observations on PLATO targets provided by WP14 • Support for on-board processing, on-ground
calibration, and scientific data analysis
Stephane Udry TALK
Exoplanet Analysis System: WP36 Coordinator is Nic Walton (IoA) Algorithms specified by WP11 under Don Pollacco
• Transit candidates and their parameters (DP2) – List of transit candidates – Ranking of candidates according to planet likelihood (à TALK Deleuil) – Basic characteristics of the transits (depth, duration, period, and ephemerids)
• Planetary systems and their characteristics (DP6) – List of confirmed planets, using follow-up observations and/or transit timing
variations – Planet parameters: orbital parameters, planet size, mass (from RV follow up,
density, age (from central stars) – Any additional characterization of planet properties from follow-up observations
(e.g. atmospheres if available) and light curves analysis – Potentially several hundreds of planetary systems for which the seismology of the
central stars is possible
Exoplanet Analysis Pipeline: Operational Cycle
Stellar Analysis System: WP37 Coordinator is Thierry Appourchaux (IAS)
Goal: Stellar radius and mass to a few % Stellar age to 10% of MS lifetime
PSPM: Marie-Jo Goupil Algorithms Stellar models with various input physics
TALK
From oscillations to stellar parameters
1) Scaling rela-ons 2) Grid method 3) Detailed modelling
M, R, age
Δν, νmax [Fe/H] log(g) Teff
ν1,…, νn [Fe/H] log(g) Teff, ...
M, R, age
Difficulty Precision
M, R
Δν νmax Teff
21
3
/
⎟⎠
⎞⎜⎝
⎛∝ΔRMν
eff2ac TRMνν ∝∝max
Data Analysis Support Tools: WP38
Coordinator is Matthias Ammler-von Eiff (MPSSR)
• Tools to assist PMC scientists to scientifically validate PLATO Data Products on a case-by-case basis and update ranking of planetary systems.
• Tools for scientific validation, e.g. replay automatic processing pipelines for a given target.
• Tools for search, statistical analysis and data mining of large samples
• Tools to provide feedback to mission planning and L2 pipes
PDC Project Office
• Email: PDCoffice@mps.mpg.de
• Members
– PDPM: Laurent Gizon
– PDC Project Office Manager: Raymond Burston
– PDC Project Office Manager Deputy: Valerian Chifu
– PDC Risk Management: Matthias Ammler-von Eiff
– PDC Cost Monitoring: Michal Svanda
• PDC Wiki http://www2.mps.mpg.de/services/plato/wiki/index.php
PDC Wiki
• PDC Calendar
• PDC WBS
• Action Items
• Meetings
• Timeline
• Documents
• Figures
• Request account now if
you don’t have one
• Bookmark the page
http://www2.mps.mpg.de/services/plato/wiki/index.php
PDCR = PLATO Payload Development and
Consolidation Review
On-going work
• Interfaces PDC/PSPM for PIC and for follow-up activities • Automatic vs. case-by-case ranking of planet candidates • Interfaces PDC/SOC: developing software in common • Operational role of Instrument Team during commissioning and
operations • Simulation concept (cf. Cambridge meeting) • Coherent development plan for PDC and PSPM
• Updates to ESA’s SOCD, SIRD, SciRD, SMP (incl. FU) • Regular update of PMC’s WBS, WPDs, SIP, costs • Document management system
• PDC will keep open the PDC wiki to deal with day-to-day affairs • Centralized documentation system to be set up at DLR-Berlin
Towards the Operational System Phase B1 activities ought to address • Algorithmic complexity, evolution from current knowledge taking
into account the expertise in PSPM from CoRoT and Kepler results.
• Computational complexity – number of targets, data richness • Data challenges – managing the data flows, considerations of
volume if more data (K-band option) is downlinked • People challenges – automation and final manual review and
ranking of planetary systems
Ten years to create an effective discovery pipeline!
Thank You
Simulations ? Gaia concept -- 3 kinds of simulators are needed:
One simulating image level data, i.e. raw samples, including detailed instrumental effects and user-defined astrophysical inputs (cf. PLATOSim) à useful to investigate specific issues and validate algorithms on a small scale (i.e. with limited-in-size but quite realistic data)
One simulating telemetry as downloaded from the satellite, with simplified instrumental effects and astrophysical inputs à useful to generate large-volume datasets to be used in end-to-end tests, involving all systems
one simulating intermediate data products as produced by different systems (e.g. PDPCs) or different steps in the data processing. à Useful for downstream systems, which ended up not participating to the end-to-end tests (due to
the simulated data being too simplistic to trigger them or to delays in the testing schedule).
S/C to Ground
• Used for fine guidance and navigation • Useful for decontaminating occultation depth measurements • Used to compute mean molecular weight of planetary atmospheres • Identification of potential blend scenarios in EAS
The PDC supports the SOC in the production of theL1 data by carrying out the following tasks:
Calibration of the scientific data, based on the calibration procedure and calibration data provided by the instrument team, for implementation into the L1 processing pipeline Definition of algorithms and support to the implementation of modules to monitor the scientific integrity and health of the observations Definition of algorithms and implementation of modules in the data analysis system for the removal of instrumental effects and generation of L1 data. Provision of input to the scientific quality control software and procedures. Provision of the necessary algorithms and tools for the optimization of the onboard processing. Provision of tools and support to simulate, test and validate the L0 to L1 processing pipeline.”
16 Cyg A
The Sun
Δν
νmax
From oscillations to stellar parameters
1) Scaling rela-ons 2) Grid method 3) Detailed modelling
M, R, age
Δν, νmax [Fe/H] log(g) Teff
ν1,…, νn [Fe/H] log(g) Teff, ...
M, R, age
Difficulty Precision
M, R
Δν νmax Teff
21
3
/
⎟⎠
⎞⎜⎝
⎛∝ΔRMν
eff2ac TRMνν ∝∝max
21
3
/
⎟⎠
⎞⎜⎝
⎛∝ΔRMν
eff2ac TRMνν ∝∝max
Ideal gas Adiaba-c Oscilla-ons Isothermal Atmosphere
Tassoul (1980) Brown et al. (1991)
1) Scaling rela-ons
PDC WBS Doc.: PLATO_PDC_WBS.ppt
Author: L. Gizon Page 30 of 10 3 December 2014
PDC WBS
DE FR
DE
301 000 PDC Project
Office Manager MPSSR R. Burston
300 000
PDC Management MPSSR L. Gizon (PDPM)
DE
370 001 PDPC-I
370 000 Stellar Analysis
System
IAS T. Appourchaux
310 001 PDC-DB
310 000 System
Architecture and Management
MPSSR R. Burston
DE 330 000
Data Processing Development
Support MPSSR L.Gizon
FR
350 001 PDPC-L
380 001 PDPC-M
FR IT UK DE 380 000
Data Analysis Support Tools
MPSSR M. Ammler-von Eiff
320 000 Data Processing
Algorithms LESIA R. Samadi
360 001 PDPC-C
360 000 Exoplanet Analysis
System IoA-Cam N. Walton
340 001 PDPC-A
340 000 Input Catalogue
ASDC-ASI P. Giommi
DPS (payload) Data Processing Algorithm WG
350 000 Preparatory & FU
Database Management
LAM M. Deleuil
Main updates since Sep 2013 in red
Page 13 of 9 4 November 2014
301 200
PDC Configuration Management
MPSSR Chifu
301 100
PDC Scheduling
MPSSR Burston
301 400
PDC Cost Monitoring
AUUK Svanda
301 300
PDC Risk Management
MPSSR Ammler-von Eiff
300 001 PDC Product & Quality
Assurance MPSSR Müller
300 000
PDC Management
MPSSR L. Gizon (PDPM)
301 000 PDC Project Office
Manager MPSSR Burston
301 001 PDC Project Office
Deputy MPSSR Chifu
331 000
Preparation Tools
CAUP Santos
331 100 Target List Preparation
CAUP Santos
331 200 Mask Preparation
Tools CAUP Santos
331 300
Simulation Tools
CAUP Santos
332 000
On-board Processing Monitoring
Tools Being taken care of
332 100 Monitoring Tools Implementation
Being taken care of
332 200 Parameter
Optimization Tools
Being taken care of
333 000
L1 Pre-processing Software
Development Support
Being taken care of
334 000
L1 Processing Software
Development
LESIA Grolleau
334 100 Instrumental Corrections
LESIA Mosser
334 300 Outlier Rejection
MPSSR Chifu
334 500 Detrending
Warwick West
334 200 Jitter Correction
LESIA Barban
334 400 Light & Centroid Curve Averaging
Support LESIA Samadi
337 000
Interfaces
MPSSR Gizon
Page 16 of 9 4 November 2014
335 000
PDC Development
Systems
MPSSR Burston
335 100
Integration
MPSSR Michels
335 200 Tests &
Validation MPSSR Bruns
337 300 SOC-MOC
Interface Support MPSSR Schou
337 100 PDC <-> SOC
Interface MPSSR Burston
337 200 L1 <-> L2 Data
Format MPSSR Birch
338 000
Contribution to End-to-
End Testing
MPSSR Burston
336 000
On-board & L1 Data
Simulation
Leuven De Ridder
334 600 Science Flux Alerts MPSSR Schou
330 001
Quality Assurance
MPSSR Müller
334 700
PSF Modelling
MPSSR Gizon
330 000
Data Processing Development Support
MPSSR Gizon
350 000
Preparatory & Follow-Up Database Management
LAM Deleuil
351 000
Interfaces
LAM Deleuil
352 000
Science Data Management
LAM Deleuil
353 000
Infrastructure
LAM Fenouillet
354 000
Information System
LAM Moreau
Page 18 of 9 4 November 2014
351 200 Interface with
WP 130 LAM Moutou
351 300 Interface with
WP 140 LAM Diaz
351 400 Interface with
WP 160 Vienna Guedel
351 500 Interface with
WP 310 LAM Meunier
352 100
Science Validation
LAM Deleuil
352 200
Inputs Validation
LAM Deleuil
352 300 Extraction Validation
LAM Deleuil
353 100
Storage
LAM Fenouillet
353 200
Services
LAM Fenouillet
354 100
Database
LAM Moreau
354 200 Technical Interfaces
LAM Moreau
350 001
PDPC-L
LAM Meunier
353 300
Support
LAM Fenouillet
354 300
GUI
LAM Moreau
355 000
Management Tools
LAM Meunier
355 100
Analysis Tools
LAM Meunier
351 100 Interface with
WP 120 Liege Morel
355 110 Data Mining Tools
LAM Meunier
355 120 Extraction Tools
LAM Meunier
355 200 VO Compliance
and Services LAM Meunier
370 000
Stellar Analysis System
IAS Appourchaux
371 000
Planning & Management
IAS Ballans
371 100 Operational
Requirements IAS Ballans
371 200 Design of Workflows
IAS Ballans
372 000
Power Spectrum Analysis Tools
IAS Appourchaux
372 100 Average Sesimic Parameter
Measurement Tools Birmingham Chaplin
372 200
Mode Fitting Tools IAS Appourchaux
374 000
Stellar Modelling Tools
AAU Aguirre
374 100 Model Grid Acquisition
CAUP Bazot
374 200 Seismic Diagnostics
& Tools QMUL Roxburgh
374 310 End-Product Guarantee Granada Suarez
374 300 Data Products 5
AAU Kjeldsen
374 400 Simulations &
Validations MPSSR Schou
373 000
Stellar Rotation & Microvariability
Measurement Tools IAS Baudin
373 200 Rotation & Activity
Analysis Tools CEA Garcia
373 300 Spot Distribution
Measurement Tools Meudon Mosser
372 210 Solar-like Stars
IAS Appourchaux
372 230 Multiple Stars
LATT Ballot
372 240 Ensemble Fit
Saclay Garcia
372 220 Solar-like Stars with Planets MPSSR Gizon
372 400 Simulations & Validations
MPSSR Schou
373 500 Simulations &
Validations MPSSR Schou
Page 20 of 9 4 November 2014
374 210 Forward Tools
Birmingham Miglio
374 220 Inversion Tools
LESIA Goupil
372 300 Data Products 3
IAS Appourchaux
373 400
Data Products 4
IAS Baudin
373 100
Stellar Background
IAS Boumier
371 300 Development
System IAS Ballans
370 001
PDPC-I
IAS Appourchaux
375 000
L1 Correction from known Transits
IAC Alonso
372 250 Red giants
Birmingham Chaplin
372 260 Heat-Driven Pulsators
Leuven Aerts
380 000
Data Analysis Support Tools
MPSSR Ammler-von Eiff
386 100 Interfaces to Databases
MPSSR Ammler-von Eiff
381 000
Documentation Management
MPSSR Chifu
386 200 Interfaces to Tools
MPSSR Ammler-von Eiff
382 000
Exoplanet Support Tools LAM Chabaud
383 000
Stellar Support Tools
MPSSR Schou
384 000
Search & Statistical Tools MPSSR Ammler-
von Eiff
385 000
VO Activities
Warwick West
386 000
Internal PDC Website
MPSSR Ammler-von Eiff
385 100 Compliance
with VO Standards
INTA Solano
385 200 VO Services Development
INTA Solano
385 300 VO Tools
Development Warwick West
384 100
Data Mining
MPSSR Ammler-von Eiff
384 200
Statistical Analyses
MPSSR Ammler-von Eiff
384 300 Feedback to L2
Processing MPSSR Schou
386 300 Alerts &
Information for Users
MPSSR Ammler-von Eiff
Page 21 of 9 4 November 2014
386 400 Information for FU
Observers
Warwick Pollacco
382 100 Feedback to L2
Exoplanet Processing
LAM Chabaud
383 100 Feedback to L2
Stellar Processing
MPSSR Schou
387 000
Feedback to Planning of
Observations MPSSR Schou
380 001
PDPC-M
MPSSR Bruns
PDC Wiki
• PDC Calendar
• PDC WBS
• Action Items
• Meetings
• Timeline
• Documents
• Figures
PDC Wiki
• PDC Calendar
• PDC WBS
• Action Items
• Meetings
• Timeline
• Documents
• Figures
http://www2.mps.mpg.de/services/plato/wiki/index.php
Example WPD for development phase • PMC SIP and WPDs need to be
updated for PDCR • PDC WPDs will be sent to PDC
WP leaders to apply essential updates
• basic updates already applied by PDC office (e.g. dates of mission phases)
• to be updated: • key personnel • institutions • milestones (new timeline!)
Previous PDC meetings and telecons: (some notable points)
• PLATO Algo meeting in Paris (5-6 Nov) (every 3 months in future) • on-board algorithms to be evaluated early • discussed interfaces with instrument/payload teams and PSPM • use of an extended download bandwidth was studied (K band) • noise budget critically depends on fields chosen (contaminants!)
• PIC meeting in Padova (21 Nov) • WP 36/11 meeting in Cambridge (24-25 Nov):
• Study of stellar activity: How to share the work? • Overall concept for simulations needed • Gaia experience is very useful for developing the processing systems • central repository for all documentation will be needed
Future PDC meetings
WP31 meeting early next year (to define technical interfaces internal to PDC and PDPCs)
WP32 Algo next meeting in early 2015 WP36 face-to-face meeting in March/April 2015