07.angelopoulos themis status 20091219.ppt · 19/12/2009 · 2007-12-04 THEMIS mini-SWT 2 SSL/UCB...

THEMIS

ARTEMIS

THEMIS-ARTEMISStatus

Vassilis Angelopoulos

THEMIS mini-SWT 1 SSL/UCB Dec.19, 2009

THEMIS

ARTEMISFirst 10 months: Commissioning and

Coast Phase Observations

Launch=2007-02-17

2007-03-23

2007-06-03

YGSE

TH-BTH-CTH-DTH-ETH-A

P1P2P3P4P5TH A P5

2007-07-15

XGSE

2007-08-30

2007-12-04


THEMIS

ARTEMIS First year baseline orbit (FY08)

Dayside 12008 08 08

YGSE

Tail 12008-02-02 2008-08-08

XGSE

TH-B

TH-C

P1

P2

2008 02 02

TH-D

TH-E

TH-A

P3

P4

P5 Second year baseline orbit (FY09)

Dayside 22009 09 16

YGSE

T il 2 2009-09-16XGSE

Tail 22009-02-18


THEMIS

ARTEMIS Current Orbits, 2nd Dayside (FY09) +


THEMIS

ARTEMIS

Extended PhaseMission Concept

• THEMIS = THEMIS baseline + ARTEMIS


THEMIS

ARTEMIS

• All instruments functioning nominally

THEMIS Mission Status

• All instruments functioning nominally– Cross calibration, inter-calibration performed during coast-phase

• Team discoveries are changing the field, excite the public– Science discoveries piling up

• >100 papers in refereed journals• GRL special issue on THEMIS, on Coast Phase• JGR special issue on THEMIS First Results• ICS10 meeting coming up – special issue in JGR (THEMIS-centric)

– Data collected per plan, and widely disseminated– First tail season showed thinner tail than expected

• Preliminary results published; adjusted 2nd tail season orbit– Second tail season results are a resounding success

• More than a dozen substorms collected: unique features on quiet time substorms• Mission completion on time, on budget by September 2009• Constellation available in good health for extended mission: FY10-12Constellation available in good health for extended mission: FY10 12• Extended Phase Approved in Senior Review (Jun 09) thru Sep 2012

– THEMIS and ARTEMIS comprise the THEMIS Extended Phase– Instruments checked out especially for low field conditions– THEMIS extended phase planning has started

• Clustered configuration, unique at inner magnetosphere; at 3000-100km• Preparing the ground for MMS that will revisit the region in 2015-2017

– ARTEMIS technical implementation going very well


THEMIS

ARTEMIS THEMIS+ARTEMIS: Financial Status

• THEMIS in late FY09 and extended phase has incurred a 40% reduction in force– Science and operations for THEMIS had to be reduced significantly, but is now stable– Early reductions due to support of ARTEMIS that could not be covered by available cash-flow– Personnel plan has stabilized, plan fits available budget

• Philosophy: Support youngest team members with partial support for senior members.• Maintain only critical mission operations, science/instrument processing functions• Reduced community support to: 1. sustaining already developed tools and 2. continue training

– Discovery potential is tremendous, as THEMIS tools mature & data quality improves• THEMIS is a gold mine due to already collected data and regions to be visited in the next 2 years• THEMIS is a gold mine, due to already collected data and regions to be visited in the next 2 years

– It is important for team members to obtain NASA/SR&T, NSF support.• 1. Solar/Heliospheric SR&T (LOI December 4, 2009, Proposals February 5, 2010)• GI due in May, SR&T due July, TR&T due October, NSF: Space Weather in January, Base: Jul-Sep

• THEMIS FY12-14: additional ~25% decrease expected (Requires ops reduction)THEMIS FY12 14: additional 25% decrease expected (Requires ops reduction)• ARTEMIS has been funded by HPS Senior Review ’08, for operations only

– Plans now: get to the moon, ensure data comes back, processed and released– Contract to be executed with proposed personnel plan (by January)

Planetary goals : proposal submitted but in a joint Helio+Planetary decision not evaluated– Planetary goals : proposal submitted but in a joint Helio+Planetary decision not evaluated– Helio MO&DA program over-committed – cash-flow status in 2010 is unclearTHEREFORE: HQ requested that a Helio+Planetary ARTEMIS Senior Review proposal be submitted jointly Separate from THEMIS will be evaluated by joint panel of experts


Separate from THEMIS, will be evaluated by joint panel of experts Upon (positive) re-evaluation, cash-flow will be committed for remainder of the year

THEMIS

ARTEMIS Statement of Task for this SWT

• THEMIS proposal– Evaluate proposed plans for FY10-12 and revise as necessary

– Maximize scientific productivity and quality science– How can the team advance the field forward?

Discuss main mission objectives for FY12 14– Discuss main mission objectives for FY12-14– Keep mission operationally simple, yet scientifically productive – Increase synergy with RBSP– Increase synergy with ERG and Orbitals

– Plan out FY14-16 and request appropriate budget planning for it– Synergy with MMS is significant; advance planning required

• ARTEMIS proposal– Evaluate proposed plans for FY10-12

G O &– Take into account recent Geotail and Kaguya results, look into synergy with LRO & LADEE– Discuss plans for FY12-14; probes will continue to be in-orbit about the moon

– Look into synergy with LADEE prime/extended and upcoming International Lunar Network


THEMIS

ARTEMIS

P3,4,5 tail scienceSignificant capability beyond THEMIS

Probes P3,4,5 in an R plane, never achieved before, measure:

• Cross-tail and field aligned currents under invariance (ideal 3-point tail constellation)

• Tailward expansion speeds using timing, lateral expansion using finite gyroradius

Y2010-04-10 00:00:00 Z

P3P4

P5

P3X

P3 X P4

P5


THEMIS

ARTEMIS

P3,4,5 dayside scienceSignificant capability beyond THEMIS

Probes P3,4,5 in an R plane, never achieved before, measure:

• Magnetopause and field aligned currents under under invariance (ideal 3-point dayside constellation)

• Bracket reconnection site, measure inflow and outflow conditions

2010-04-10 00:00:00 Z1st, 2nd, 3rd extended daysideScales: 0.01-0.4RE, P3 out

P4

P3

XP5 X


THEMIS

ARTEMIS Extended THEMIS (P3,P4,P5)

• At the Magnetotail, Study:– Nature of the near-Earth current sheet– Dissipation of bursty fast flows

• Result:

• With first ever:– Simultaneous dR-dZ separations, 0.1-1RE– Clustered orbits study the 8-12RE region

• Result:– Ability to map and model key

instability region

Z2010-04-10 00:00:00 Z

FASTP4

P3X X

FAST

P5

Y

THEMIS mini-SWT 11 SSL/UCB Dec.19, 2009Courtesy: Pulkkinen and Wiltberger

THEMIS


• At Subsolar Magnetopause, study:– Asymmetric reconnection: dynamics, evolution

and role of cold ions– Internal FTE structure and electron acceleration

• Using novel:– Simultaneous dR-dZ separations at

0.1-0.5RE monitor inflow and outflow– Cluster-like separations at subsolar

• Result:– Hall-physics of subsolar magneto-pause

reconnection, paves way to MMS

pregion

2010-04-10 00:00:00

P4

Z 1st, 2nd, 3rd extended daysideScales: 0.01-0.4RE, P3 out

P4

P3

[THEMISCoast PhaseMozer et al.G ]

P5 X


GRL]

THEMIS


• At Inner Magnetosphere, Study Role of:– ULF/VLF/EMIC waves on ion, electron

energization/losses – Large electric fields on storm time ring current

• Using novel:– 0.1-2RE separations to resolve

temporal/spatial evolution of gradients– daily conjunctions: PFISR, S-DARNg g

• Result:– Comprehensive AC waves and E-fields models

y j ,

P3 P4

P5


THEMIS

ARTEMIS Beyond Substorm Timing, 2nd tail (FY09) +

• Continue analysis of prime mission 2nd year tail, present at upcoming AGU:– Macroscale interactions: flow diversion or tailward retreat of X-line ?

M f i h i li– Means of ionospheric coupling– Coupling to local instabilities: ballooning, interchange and whistler modes– Statistics of triggers under a variety of solar wind conditions

• Beyond prime: resolve open questions on substorms:– What causes gradual auroral brightening ahead of onset?– What process enables the current sheet to reconnect?– Does tail history dictate onset mechanism, location?

• Extended mission is ideally positioned to go beyond timing studies


THEMIS

ARTEMIS

ARTEMIS (P1,P2) in FY10,11,12:Mission Concept

• FY10: Translunar injection• FY11-12: 6mo in Lissajous orbits +

17 mo in Lunar orbits

Lunar WakeFormation/Evolution

Magnetotail

THEMISP1 P2X

DTurbulent wake?

Last closed field lineGeotail

Moon

P1P2

P1 P2Solar Wind

Diffusive Particle

Acceleration

Shock tangent

Foreshock waves

Last c P1


s

THEMIS

ARTEMIS ARTEMIS Phases

Li j PhTranslunar injection phase(Oct ’09 – Oct ’10)No Science, just get there.N t O bit R i M (ORM )

Lissajous Phase(Oct ’10 – Apr ’11)Note: First 3 months: opposite sides,Next 3 months: same side

Lunar Orbit Phase(May ’11 – Sep ’12)Note: P1 retrograde, and P2 prograde, such that orbitalNote: Orbit Raise Maneuvers (ORMs)

start: July 2009, in parallel withTHEMIS 2nd dayside operations(THEMIS dayside requirementsmet already since 1st dayside season)

p g ,separations and separationvectors cover full parameter space

y y


THEMIS

ARTEMIS ARTEMIS Science Objectives, #1

• In the Magnetosphere, study:– Particle acceleration: X-line or O-line? – Reconnection: 3D character; global effects– Turbulence: Drivers and effects

• Using the first:– Two point: dX, dY measurements– …at scales from ion gyroradius

to several RETurbulence: Drivers and effects• Result:

– Reveal 3D distant tail, dynamics• In conjunction with:

E– Even single point measurements

are critical in this region

j– Solar wind monitors:

• ACE, WIND, STEREO– Inner magnetosphere monitors:

• Cluster, Geotail, FAST


THEMIS


• Using first of a kind:– …two point measurements

at scales 1-10 RE, ideal for study of particle evolution in shocks, at

• In the Solar Wind, study:– Particle acceleration at shocks – Nature and extent of elusive low-shear

reconnectionforeshock and inertial range of turbulence

– WIND can replace one of twoprobes in this study

– Properties of inertial range of turbulence• Result:

– Advance our understanding of particle acceleration and turbulence in Heliosphereacceleration and turbulence in Heliosphere

• In conjunction with:– Other solar wind monitors:

• ACE, WIND, STEREO, ,• ARTEMIS is:

– High-fidelity solar wind monitor– In beacon mode if requested


THEMIS


• At the Moon/Wake:– Study 3D structure and evolution of wake – Understand particle acceleration at wake– Understand wake refilling under various SW

• Using first of a kind:– …two point measurements

at scales 0.1-10 RE, ideal for two-point correlations within wake Understand wake refilling under various SW

conditions• Result:

– Advance our understanding of wakes at planetary moons plasma void refilling around

and between wake and solar wind

– Comprehensively instrumentedsatellites have never studied

k f i tplanetary moons, plasma void refilling around large objects (Shuttle, ISS, Hubble)

wake from various vantage points, thus even single pointmeasurements are critical.


THEMIS

ARTEMIS Summary• THEMIS has delivered on its promises

– Major discoveries from coast phase in GRL, JGR, SSR special issues– Baseline mission accomplished, substorm trigger identified, 2nd year data collected– New results in dayside and inner magnetosphere are taking the field to new heights

• THEMIS extended phase – A Cluster incarnation in equatorial orbits in FY10-12– LWS synergy in FY12-14: Continuous coverage of rad. belt sources; 6 rad. belt traversals daily– In excellent position to support MMS in FY14-17

• THEMIS+ARTEMIS: Continue to fully embrace community– All Data Open in CDF, IDL Analysis Code on-line, VMO/SPASE– Help line available; Mirror sites proliferating; Software tutorials at main meetings

• THEMIS+ARTEMIS in FY10-12: Is The Cornerstone of Heliophysics ObservatoryTHEMIS+ARTEMIS in FY10 12: Is The Cornerstone of Heliophysics Observatory– In novel orbits, with comprehensive instrumentation, address pressing Heliophysics questions

• THEMIS baseline = Clustered at equator : uniquely suited to address current dynamics, dissipation• ARTEMIS = Two probes, address fundamental physics in Tail, Solar wind and at the Lunar distances

– A bridge in Heliophysics discipline, between ISTP+Cluster era and RBSP, MMS era– Complement existing missions and provide context for new ones (e.g., RBSP, ERG, Orbitals, MMS)


07.angelopoulos themis status 20091219.ppt · 19/12/2009 · 2007-12-04 THEMIS mini-SWT 2 SSL/UCB...

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Transcript of 07.angelopoulos themis status 20091219.ppt · 19/12/2009 · 2007-12-04 THEMIS mini-SWT 2 SSL/UCB...