Doppler Spectro Imager

PI: F.X. Schmider (Observatoire Côte d’Azur, F)PM: Fréderic Rouesnel (Institut d’Astrophysique Spatiale, F)DSI-ECHOES team

Cosmic Vision 2015-2025

AssessmentPhase 0/A

DefinitionPhase A/B1

ImplementationPhase B2/C/D

2009 2010 2011 20202012 2013 2014 2015 2016 2017 2018 2019

EJSM/Laplace

TSSM/Tandem

Lisa

IXO

L1 launch

InstrumentsDOI AO

LOE

2008

MLA

DOI: Declaration of InterestAO: Announcement of OpportunityLOE: Letter of EndorsementMLA: Multi-Lateral Agreement

M-c

las

s m

iss

ion

s

Euclid

Plato

Cross-Scale

Marco-Polo

M1 launch

Solar Orbiter

Spica

M2 launch

L-c

las

s m

iss

ion

s

InstrumentsDOI MLA

TRL ≥5 TRL ≥5

TRL ≥5 TRL ≥5

AOLOE

2

Doppler Spectro Imager

• Science goal : Formation and evolution of the Solar System

• 2 objectives: Internal structure (M1)

• Atmosphere study (L1 to L4)

3

Jovian seismology

Main goalSolar system formation scenarii: accretion, gravitational instability ?

Key questionDoes Jupiter have a core ? If any, what size/mass ?What happens at the transition metalic/molecular hydrogen ?

The toolSeismology : most performant way to investigate planetary and stellar internal structures (e.g. SOHO for the Sun, CoRoT for the stars)Measurement of mode frequencies up to degrees l=100Complementarity with JUNO gravitational moments

from Guillot et al. 2004

Main goalsOrigin of the global circulation of Jupiter, Structure of the troposphere: interaction between the envelope and the upper atmosphereStructure of the band system: its relation to differential rotation

Key measurements - Travelling waves detection and characterisation (cross-correlation): dynamics and composition - Velocity field: thermodynamics quantities and the “potential vorticity”This latter quantity can be deduced from observations of the wind field, together with temperature profiles of the atmosphere.

The tool Doppler measurements 3D velocity maps wave propagation

Study of the upper troposphere

5

DSI – ECHOESProbing internal structure

obs

- theoretical

Inversion method

obs

- theoretical

Theoretical works: Vorontsov 76, Bercovici & Schubert 87, Gudkova & Zarkhov 99, Lognonné 2007

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Best detection level: 1 bar Velocity measurement 2D images and velocity maps at 1 frame/mn Mode frequencies = [0.5 - 3.5] mHz Mode amplitudes = [10 - 50] cm/s (Bercovici and Schubert, 1987)

DSI – ECHOESDetection of acoustic modes

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Instrument StudyTeam organisationTeam organisation

8

JPL (USA)Neil Murphy

LESIA (France)B. Mosser

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Instrument StudyStudy TeamTeam

OCA IAS

J-B Daban Local Manager Frederic Rouesnel Project Manager

Yves Bresson Optique Gilles Morinaud Mecanique

Carole Gouvret Optique Véronique Hervier Electronique

Cathy Blanc Gestion Boubacar Bah Electronique

Anne Philippon Optique

JC Clec’h Thermique

Didier Campistron Qualité

Chloe Gallar Assistante Projet

10

Instrument StudyTeam membersTeam members

Sylvie Robbe OCA France

DSI – ECHOES SYMPA results

• First instrument dedicated to Jovian seismology • Fourier transform tachometer: velocity measurement with spatial resolution• Ground based network: 2 (3) instrument on 1.5 m telescopes• Presence of a periodicity of 156 µHz in the density power spectrum ℓ= 0 and ℓ =1• First clear evidence for Jovian acoustic mode (Gaulme et al 2010, to be submitted)

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DSI – ECHOESDSI – ECHOESInstrument pInstrument principle

Fourier tachometerFixed OPD Mach Zehnder interferometer

Four output images in phase quadrature

OPD modulation for calibration

Solar reference for absolute velocity

12

DSI – ECHOES Velocity measurement

Measurement of combined vertical and horizontal velocities: sum of Doppler shifts in direction of the Sun + in direction of the S/C

Seismology: search for velocity variationsGlobal noise level < 1 cm²/s²/µHz up to l=100Atmosphere: following of structure with jovian rotation separates vertical and horizontal componentsPrecision: 20 m/s/px/hr (400x400 pxs @ 150 km )

DSI – ECHOES Mission scenario

SeismologyAtmosphere

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15

DSI – ECHOESDSI – ECHOESBlock diagramBlock diagram

DSI-ECHOESOptical study

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Mach-Zehnder

Equivalent pupil diameter: 3.2 cmEquivalent focal lengh: Full field: 2.72 degreesPixel size: 18 µm

DSI - ECHOESMechanical design

17

Door

Fine pointing mirror

Large pointing mirror

Pupil

Triplet Baffles Doublet

Filter

Interferometer unit

17

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DSI - ECHOESMechanical design

Mach-Zehnder support:Titanium plateModulation PZT support

Fine guiding mirror with PZT

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DSI - ECHOESThermal and mechanical studies

20

DSI - ECHOESFocal Plane Assembly

Hydra StartrackerSodern

21

Diffuser

Door

Baffle 1st lens

Optical fibers

sun

DSI - ECHOESCalibration concept

The in-flight calibration should follow 3 steps:

- Distortion calibration: A star is pointed by the S/C and acquired in the DSI field and its position measured on the four sub images. Differential positions on the sub-images provide the algorithm of distortion correction.- Flat field calibration: Uniform illumination of the field is performed, with an internal source.- Fringe calibration: with solar light uniform illumination, the MZ OPD is modulated at 0, /2, , 3/2, allowing the determination of the OPD dependence in the field, i.e. the fringe contrast and phase (OPD) at any point in each sub-image.

DSI – ECHOESDSI – ECHOESInterface and resources Interface and resources

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Instrument type Compact interferometer Mass 16.4 KgPower consumption 23.2 Watts with 25% marginsOperating temperature -10°C to 40°COperating temperature stability 0.5 °C/hData volume 70 GbitsData products Velocity/intensity/ polarization maps

DSI-ECHOES – I unitWavelengths [519-520] nmFOV 2.72 deg.Spatial Resolution 25 arcsec / pixelFilter bandwidth 1 nmNoise Velocity Level 1 cm²/s²/µHz in [0.5 - 4] mHz rangeExposure times 5 sDetection APS - 1k× 1k - 18 µm pix. (rad-hard qualified)Absolute calibration 10 m/sPointing stability 0.54 arcsec rms (1 ) over 5 sMass 13.0 KgPower consumption 6.37 WattsVolume (640 x 270 x 175) mm3

DSI-ECHOES – E/F unitMass 3.4 KgVolume (290 x 220 x 95) mm3

Power consumption 16.88 Watts

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DSI – ECHOESDSI – ECHOESDescope optionsDescope options

Before the AO [..] will complete the study of each sub-system and will examine the technical descope options in order to reduce the S/C resources requirement. It will be focussed on the full data acquisition and treatment simulation, in order to eliminate possible redundancies in the calibration system and reduce the data rate.

[…] also pay attention to the consolidation of the consortium for the AO answer.

Two TDAs are also being carried: complete MZ breadboarding R&T on going, radiation mitigation.

“Other subsystems require a special attention to reach the TRL 5 before 2012. Although these subsystems are not technological development, these activities are listed in the planning.”

Calibration sub-system Detector Unit (PRNU stability) R&T submitted for 2011

DSI – ECHOESFollow- up

• Global Budget for DSI-Echoes (overall PFM program) :

DSI – ECHOESGlobal budget

DSI - Echoes ROM costBudget Allocations (k€)

≤ 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 > 2020 Total

0/A A A/B1 B1 B2 C/D C/D C/D C/D C/D C/D E Total

Equipment (HW / SW) and Eng. Studies 4 82 87 103 122 160 407 792 1019 500 40 20 3336

AIT / AIV, GSE and Harness 0 48 23 27 38 162 219 232 232 232 87 10 1310

Calibration and Facilities 0 25 10 25 39 65 65 65 127 85 114 90 710

Operation & Data Processing Center 0 0 0 0 0 0 0 0 50 50 197 400 697

Missions & Colloquium 20 15 26 26 35 51 51 51 51 51 51 462 893

PA / QA sub-contractors 0 65 131 131 131 131 131 131 131 131 131 720 1963

Technical Assistance sub-contractors (CDD) 8 48 88 88 88 88 88 88 88 88 88 605 1453

Outpblic Relation 0 2 2 2 2 5 5 5 10 10 10 84 137

CNES funding (k€) - total per year 32 286 367 402 455 662 966 1364 1708 1147 718 2391 10499

French manpower cost (INSU ressources) 291,60 442,80 702,00 928,80 1000,80 1022,40 1051,20 1144,80 1177,20 1292,40 1018,80 622,80 10073

Other funding contribution (HW/SW phase E excl.) 0,00 46,00 87,00 248,00 265,00 348,00 427,00 796,00 592,00 256,00 38,00 0,00 3103

Other funding contribution (Man power) 55,08 136,00 311,10 484,50 484,50 421,60 421,60 421,60 421,60 421,60 421,60 0,00 4001

Total non CNES (k€) 346,68 624,80 1100,10 1661,30 1750,30 1792,00 1899,80 2362,40 2190,80 1970,00 1478,40 622,80 17799

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General duties and/or responsabilities

Project managementSystem engineeringPA management (including PP activities)AIT/AIV activitiesLocal management (technical and product assurance)Science working groupPublic OutreachPost-delivery support

Payload - DSI-Echoes (DSI - I / E / F)

Optics(design, tolerancies budget and manufacturing)

Optical metrology(control and metrology)

Optical analysis(MZH and parasite light)

Mechanical design(design, tolerancy budget and manufacturing)

Door design with mechanism(design, tolerancy budget and manufacturing)

Detection chain (detector , focal plane and FEE)

Calibation sub-system (design, tolerancies budget and manufacturing)

Thermal design (design, studies and manufacturing)

Main electronic unit HW (DPU and PSU - design and manufacturing)

Main electronic unit SW (software algorithm, devlopment and validation)

Proximity Electronics (design, manufacturing and qualification)

Environmental tests (thermal, humidity and EMC/ESD)Functional and performances tests@ system level (optics, mechanisms and electronics)Visible calibration @ system level (facilities and integrated tests level)

Visible calibration @ sub-system level (facilities and tests)

Radiation Qualification Programme (facilities and tests)

Instrument GSE (design, upgrade and delivery)

Flight harness (design and manufacturing)Ground segment - activities and responsibilities

Science Operation Center(operation, science planning, quick look data visualization, data pipeline and distribution)Science Data Processing(calibration and analysis software, data processing and archiving)

DSI – ECHOESWBS

DSI ECHOESMan Power OCA

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EJSM / DSI-EchoesFizeau Technical Team

2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2020 + Total

Local Manager 0% 25% 30% 30% 30% 30% 30% 20% 20% 40% 40% 20% 50% 3,65

PAM / QAM 0% 0% 10% 10% 10% 10% 10% 10% 10% 10% 20% 10% 20% 1,30Optical Engineer (design / architecture / Test) 20% 75% 75% 50% 75% 75% 75% 75% 50% 50% 50% 20% 0% 6,90Mechanical Technician (AIT - OGSE / MGSE) 0% 0% 10% 10% 0% 0% 0% 10% 10% 0% 0% 0% 0% 0,40Testing (Func, Perfo and Calibrations) 0% 0% 50% 75% 75% 50% 50% 50% 50% 50% 50% 25% 200% 7,25Software Engineer (data processing / archiving) 0% 0% 50% 50% 50% 25% 50% 25% 50% 50% 50% 50% 150% 6,00Electrical Technician (AIT / harnesss) 0% 0% 10% 0% 0% 0% 0% 15% 15% 0% 0% 0% 0% 0,40

TOTAL 0,2 1 2,35 2,25 2,4 1,9 2,15 2,05 2,05 2 2,1 1,25 4,2 22,25

Phase Projet 0/A 0/A A/B1 A/B1 B2 B2 C/D C/D C/D C/D C/D C/D E

Model Propal ProtoProto -

A0 OM EM EM EQM EQM EQM FM FMFS -

GRM -

• Study Phase (TDAs) - ROM cost estimated to 587 k€ (2011 / 2012)

DSI – ECHOESTechnology Development Activity

Activités Fincancement françaisFincancement étranger

MZH prototypeR&T (acquis : 80 k€, demandé: 90 k€)Supp. 2012 : 50 k€ - TBC

-

Radiation (component lev.) 55 keuros 10 keuros (IFSI)

Calibration prototype 120 k€ (2 ans) 27 k€ (Luxembourg)

Detector Unit 135 k€ (2 ans) – R&T submitted 20 k€ (Luxembourg)

Objectif généralAtteindre TRL 5 pour le bloc Mach Zehnder: s’assurer de la faisabilité du composant contrôler ses performances dans un environnement thermique représentatif du S/C.

Plan général d’actions• Spécification du MZ • Etude du MZ (configuration géométrique et choix des verres) et du banc de test ;• Approvisionnement du prototype de MZ et autres composants pour le banc de tests ;• Intégration, réalisation des tests et rapport de qualification.

Financement CNES80 k€ 201090 k€ 2011-2012 (demandé)

R&T MZ

Thése Laurence Soulat

Sujet de thèse« Mise en œuvre d’un interféromètre imageur de

Mach-Zehnder pour la sismologie de Jupiter »

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Appareillage de mesure :-analyseur de front d’onde-optique + caméra-polariseur + détecteur…

Sortie 1

Sortie 2

Four

Masque de champMasque

pupille

R&TSchéma du banc de tests

Mesure de qualité de front d’onde dans les 2 sorties

Contrôle de la ddm

Contrôle de l’échantillonnage, du contraste et de la régularité des franges

Mesure de stabilité thermique de la ddm

Mesure de transmission dans les 2 voies, mesure de polarisation.

Contrôle de la fonction de calibration, ajustement de ddm en fonction de T°, stabilité de la platine

Vide

R&TPartage des responsabilités

Planning R&T MZ

2010 2011 2012

Phase A

Manpower R&T MZ DSI 2,35 3,45 3,3 9,1 FI ZEAU OCA 1,9 3 2,85 7,75

- Management 0,5 0,5 0,5

- I ngénierie optique 1 1 1

- I ngénierie mécanique 0,1 0,25 0,1

- I ngénierie informatique 0 0,25 0,25

- Thèse 0,3 1 1

I AS 0,45 0,45 0,45 1,35

- Management 0,2 0,2 0,2

- I ngénierie mécanique/ thermique 0,25 0,25

- Qualification environnement spatial 0 0 0,25

Total

(homme.an)Phase B

R&T MZManpower OCA