themis/miwg#3 1 ssl, 06/15/2005 themis t ime h istory of e vents and m acroscale i nteractions...

THEMIS/MIWG#3 1 SSL, 06/15/2005

•THEMIS•TIME HISTORY OF EVENTS AND MACROSCALE INTERACTIONS DURING SUBSTORMS

•RESOLVING THE MYSTERY OF WHERE, WHEN AND HOW AURORAL ERUPTIONS START

•THEMIS THEMIS •Mission Integration Working GroupMission Integration Working Group•University of California, BerkeleyUniversity of California, Berkeley•June 15-16, 2005June 15-16, 2005


• Coffee, and food at Silver Addition Main Entrance (outside)

• Splinter room in Silver Annex Conference

• Parking Passes, see Daniele

• Other issues, see:Vassilis Angelopoulos or Peter Harvey

Silver Addition

Samuel Silver Space Sciences Laboratory

Silver Annex

Main Conference Room

Conference Rooms

For maps, etc. go to http://www.ssl.berkeley.edu/


AGENDA Day 1


AGENDA Day 2


Name Org Phone Email

Attendance


SPACE SCIENCES LABORATORYBackground• Initiated in 1958 by Drs. Teller and Seaborg• Multidisciplinary organization• Connecting campus research to space efforts• Facility opened in 1966• New facilities added in 1998Research Efforts Involving• Balloons• Sounding rockets• Satellite instruments & science complements• Complete satellites• Mission & Science Operations• Ground Station OperationsAgencies Involved• NASA, NSF, NSBF, USAF, DOE• ESA, ISAS, IKI, PSI, etc.• $50M/yr (>90% NASA, <10% other.)


Facilities

• 55000 sq. ft. Office and Laboratory Space

• Employing 420 Scientists, Engineers, Staff

• On-Site Machine Shop

• Clean Room Facilities to Class 100

• Thermal Vacuum Facilities up to 3m diameter

• Spacecraft Integration Facility

• 4-story High Bay

• Radiation Sources Laboratory

• Mission Operations Centers

• Science Operations Centers

• 11 Meter S-Band Satellite Antenna

• Secure High Speed Communications to NASA


Operational Flight InstrumentsRHESSIFASTIMAGE FUV, WICGALEX detectorsCHIPSPolar EFIWind 3DPCluster II EFW, CISMars Global Surveyor ERROCSAT 2 - ISUALUlysses LANFUSE detectorsSOHO UVCS & SUMER detectorsKITSAT SPEAR

Under DevelopmentHUBBLE - COSSTEREO – IMPACTTHEMIS


SSL PERSONNEL

107 Scientific Researchers

133 Professional/Technical/Support Staff

150 Graduate and Undergarduate Students

SPACE PHYSICS RESEARCH GROUP (136 total personnel)

46 Scientific Researchers

25 involved in Magnetospheric Physics

46 Engineering & Technical Staff

37 Graduate & Undergraduate Students


Operations Components• Mission Operations Center• Science Operations Center• 11-meter S-Band Antenna with X-band capability• High Speed Communications to NASA Ground Network• Network Security• Autonomous Operations Pass Supports Orbit Determination & Tracking Spacecraft Command & Control Emergency Response System Self Checking


FAST: A NASA Small Explorer (SMEX)PI: Prof. Robert P. Lin UCB-SSL

• Science Package Electric Field Instruments Particle Instruments Electronics• Mission Operations• Science Operations Launched on 21 Aug 1996Mission Continuing through 2005


RAMATY HIGH ENERGY SOLAR SPECTROSCOPIC IMAGER

RHESSI: A NASA Small Explorer (SMEX)PI: Dr. Charles Carlson, UCB-SSL• Project Management• Spacecraft Bus Subcontract to Spectrum Astro• Science Package Imager Spectrometer Electronics• Launch Site Processing• Mission Operations• Science Operations• Ground Data Systems Launched February 5, 2002Mission continuing through 2006-7


Cosmic Hot Interstellar Plasma Spectrometer (CHIPS)A NASA University-Class Explorer (UNEX)

PI Dr. Mark Hurwitz UCB-SSL


TIME HISTORY OF EVENTS AND MACROSCALE INTERACTIONS DURING SUBSTORMS

THEMIS: A Middle Class Explorer (MIDEX#5)

PI: Dr. Vassilis Angelopoulos UCB-SSL• Project Management• Probes and Probe Carrier by Swales Aerospace• Mission Integration• Launch Site Processing• Science Package• Mission Operations• Science Operations• Ground Data Systems Launch: October 19, 2006Nominal Lifetime: 2 years Production Mode Development of

Flight Boards (Here: SST Front-End)


TIME HISTORY OF EVENTS AND MACROSCALE

INTERACTIONS DURING SUBSTORMS (THEMIS)

RESOLVING THE PHYSICS OF ONSET AND EVOLUTION OF SUBSTORMS

Principal InvestigatorVassilis Angelopoulos, UCB

EPO LeadNahide Craig, UCB

Project ManagerPeter Harvey, UCB

Industrial PartnerSWALES Aerospace

SCIENCE GOALS:

Primary:

“How do substorms operate?”– One of the oldest and most important

questions in Geophysics– A turning point in our understanding

of the dynamic magnetosphere

First bonus science:

“What accelerates storm-time ‘killer’ electrons?”– A significant contribution to space weather science

Second bonus science:

“What controls efficiency of solar wind – magnetosphere coupling?”– Provides global context of

Solar Wind – Magnetosphere interaction


Auroral eruptions and substorms

Auroral eruptions…

AuroraAurora

…are a manifestation ofmagnetospheric substorms

MAGNETOSPHERESO

LAR

WIN

D

EQUATORIAL PLANE

THEMIS/CCR 17 HQ, 06/02/2005

Mission elements

Probe conjunctions along Sun-Earth line recur once per 4 days over North America.

Ground based observatories completely cover North American sector; can

determine auroral breakup within 1-5s …

… while THEMIS’s space-based probes determine onset of Current Disruption and Reconnection each

within <10s.

: Ground Based Observatory

THEMIS/CCR 18 HQ, 06/02/2005

First bonus: What producesstorm-time “killer” MeV electrons?

Affect satellites and humans in space

Source:

– Radially inward diffusion?

– Wave acceleration at radiation belt?

THEMIS:

–Tracks radial motion of electrons

•Measures source and diffusion

•Frequent crossings

–Measures E, B waves locally

ANIK telecommunicationsatellites lost for days to weeks

during space storm

THEMIS/CCR 19 HQ, 06/02/2005

Second bonus: What controls efficiencyof solar wind – magnetosphere coupling?

Important for solar wind energy transfer in Geospace

Need to determine how:– Localized pristine solar wind features…– …interact with magnetosphere

THEMIS:

– Alignments track evolution of solar wind

– Inner probes determine entry type/size

THEMIS/CCR 20 HQ, 06/02/2005

Nominal Launch: Launch Elements Fuel marginsLaunch Date (APG,INC) (baseline,P5->1,P5->2->1) October 19, 2006 (14.2 Re, 13.4deg) (23.4%, 13.6%, 20.7%)

9/15/2006 13 36 114 3 26 104 309.3 319.310/1/2006 12 34 112 2 24 102 310.5 320.5

10/15/2006 10 33 111 0 23 101 311.6 321.611/1/2006 8 31 109 -2 21 99 312.8 322.8

11/15/2006 7 29 108 -3 19 98 313.8 323.8

OPTIMAL APER = -10deg

0 -10LD @d(inc) @T1+1m @T2+1m @d(inc) @T1+1m @T2+1m

Launch APER= Launch APER= Launch RAP

Launch RAAN

Baseline launch elements

Near-zero goal 80<aper<110 deg goal

THEMIS/CCR 21 HQ, 06/02/2005

Probe release 1+4

THEMIS/CCR 22 HQ, 06/02/2005

Boom release 2 first+6 later

THEMIS/CCR 23 HQ, 06/02/2005

Tail Season #1

Tail Season #2

Tail Season #1

Tail Season #2

Days since10/16/07

Days sinceLaunch

Days sinceLaunch

Days since10/16/07

Ascend to orbit (courtesy Sabine Frey)

INC

T[h

rs]

INC

T[h

rs]

THEMIS/CCR 24 HQ, 06/02/2005

Probe alignments (courtesy Sabine Frey)

Tail Season #1 Tail Season #2

Selected launch elements meet science requirements with sufficient fuel margins

themis/miwg#3 1 ssl, 06/15/2005 themis t ime h istory of e vents and m acroscale i nteractions...

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