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Electric Field and Waves Instrument

(EFW)

Technical Interchange Meeting

Dr. John Wygant, UMN

Dr. John Bonnell, UCB

Peter Harvey, UCB

And the EFW Team!

15 August 2007

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Agenda

Start Description Speaker File9:00 Introductions Harvey 19:15 MRD Review Harvey 19:30 SEMP Review Harvey 19:45 PRA Discussion Fox -

10:00 Electrical Architecture Review Ludlam 210:15 EFW/Spacecraft ICD Review Ludlam 310:30 EFW Digital Electronics Ludlam 410:45 EFW/EMFISIS interface Richard 511:00 EFW Boom Electronics Richard 611:15 EFW Spin Plane Booms Dalton 711:30 Break11:45 Axial Boom Accomodations Turin 812:00 Axial Boom Shading Concerns Turin 812:15 Suite and S/C I&T Approach Harvey 912:30 Mass and Power Harvey 1012:45 Fuel Slosh Concerns Harvey 1113:00 S/C Charging Wygant 1213:15 Lunch14:15 Tour14:45 Commissioning Plan Harvey 1315:00 TRL Assessment Harvey 1415:15 Risk Management and Status Harvey 1415:30 Upcoming Deliverables Harvey 1415:45 Wrap Up Harvey 14

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• RBSP EFW Meeting room will be in the Annex ConferenceRoom

Silver Addition

Samuel Silver Space Sciences Laboratory

Silver Annex

Follow driveway to the Annex Meeting room

Location

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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.• $35M/yr (85% NASA, 15% NSF, 5% misc.)

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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

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Operations Components• Mission Operations Center

• Science Operations Center

• 11-meter S-Band Antenna with X-band upgrade capability

• High Speed Communications to NASA Ground Network

• Network Security

• Autonomous Operations

– Pass Supports

– Tracking and Data Acquisition

– Spacecraft Command and Control

– Emergency Response System

– Self Checking

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Flight Spacecraft and InstrumentsTHEMIS RHESSIFASTPolar EFIWind 3DPCluster II EFW, CISImage FUV, WICMars Global Surveyor ERUlysses LANFUSESOHO UVCS & SUMERCHIPSROCSAT 2 - ISUALGALEXHUBBLE - COSSTEREO - IMPACT

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SPACE PHYSICS RESEARCH GROUP (136 total personnel)

• 46 Scientific Researchers

– 25 involved in Magnetospheric Physics

• 46 Engineering & Technical Staff

• 37 Graduate & Undergraduate Students

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EXTREME ULTRAVIOLET EXPLORER

• Project Management

• Science Package

– Telescopes

– Electronics

• Mission Operations

• Science Operations

 Launched on 7 June 1992Mission Successfully Concluded 1Q2001

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FAST AURORAL SNAPSHOT

• Science Package

– Electric Field Instruments

– Particle Instruments

– Electronics

• Mission Operations

• Science Operations Launched on 21 Aug 1996Mission Continuing through 2008

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RAMATY HIGH ENERGY SOLARSPECTROSCOPIC IMAGER

• Project Management

• Spacecraft Bus

• Science Package

– Imager

– Spectrometer

– Electronics

• Mission Operations

• Science Operations

• Ground Data SystemsLaunched February 5, 2002Mission Operations now Over 5 years

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TIME HISTORY of EVENTS and MACROSCALE INTERACTIONS during SUBSTORMS• Project Management

• 5 Spacecraft plus Carrier

• Science Packages (each spacecraft)

– 3-axis Electric Field

– 3-axis Fluxgate & Search Coil Mag

– 3D Electrostatic Analyser

– Solid State Telescope

• 20 Ground-Based Observatories

• Mission & Science Operations

• Ground Data Systems

Launched February 17, 2007Mission now in Cruise Phase

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MRD Review

Section 2 ID Description StatusMRD/MIS-224 required accuracy of spin-axis measurement is 20%, not 10%MRD/MIS-126 S/C potential dynamic range of +/- 250 volts should be TBRMRD/MIS-268, -269 are the 3-sigma position (10-km) and velocity (0.1 km/s, 1 degree) error

levels sufficient for -VxB calculation?MRD/MIS-280 how is the +/- 22 km position error consistent with the +/- 10 km

position error in the other requirements?MRD/MIS-65, 285, 286, 287

EMF and EFW boom attitude knowledge requirements are all TBD

MRD/MIS-112 Is the RE spec consistent with the EFW/EMFISIS interface noise and sensitivity levels in the Draft MOU; the curve suggests an upper limit in the 0.2 to 0.4 uV/m range at 50 meters from the SC (our sensor locations).

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MRD Review

Section 3 ID Description StatusMRD/ELE-454 requirement of less than 24-hour latentcy on data; is this an issue with

our idea of how the SLBM will be operated?

MRD/ELE-120 is the AC stuff referenced here our on-board continuous spectral data, or waveforms, or ground-based processing? Also, what does the TBS about the Project Science team?

MRD/ELE-126 are these levels consistent with the EFW/EMFISIS MOU?MRD/ELE-124 this is phrased in a way that suggests that each instrument suite MUST

provide 1800 minutes of burst data per week when requested by the SC. This is not consistent with MRD/ELE-395, which states that the suites have to accept burst commands, but not how

MRD/ELE-300 Space Weather parameters for EFW not defined here, but are defined in MRD/MIS-125 and -126; why aren't the parameters from 125 and 126 repeated here, perhaps with TBRs?

MRD/ELE-49 vs ELE-19

SPB and AXB ICD compliance should assure these requirements, or the ICD should inheirit requirements that ensure the satisfaction of the alignment (orthogonality of the three-axis boom system).

MRD/ELE-128 This measurement requirement should be on the EFW suite, not the SPB units which have no A/D conversion capabilities.

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MRD Review

Section 3 ID Description StatusMRD/ELE-134 This measurement requirement should be on the EFW suite, not the

SPB units which have no A/D conversion capabilities.MRD/ELE-144 This measurement requirement should be on the EFW suite, not the

SPB units which have no A/D conversion capabilities.MRD/ELE-157 This measurement requirement should be on the EFW suite, not the

SPB units which have no A/D conversion capabilities.MRD/ELE-162 This measurement requirement should be on the EFW suite, not the

SPB units which have no A/D conversion capabilities.MRD/ELE-21 This measurement requirement should be on the EFW suite, not the

SPB units which have no A/D conversion capabilities.MRD/ELE-172 This measurement requirement should be on the EFW suite, not the

SPB units which have no A/D conversion capabilities.

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MRD Review

Alignments Description StatusMRD/ELE-121 Needs work, probably by P. Turin, to better divide the allowed error

budgets (+/- 0.5 to 1 degree on parallelism and orthogonality) between ICD compliance on the part of the SPBs and AXBs, as well as knowledge of mounting of SPBs and AXBs.

MRD/ELE-19 SPB post-deploy - This should be a Spacecraft requirement to mount the SPB's on the CG line.

MRD/ELE-506 SPB mounting - This should be a Spacecraft requirement to mount the SPB's appropriately.

??? Don't we need SPB S/C alignment knowledge (analog to MRD/ELE-511)

MRD/ELE-507 AXB post-deploy - This should be a requirement on the straightness of the AXB boom measured w.r.t. the AXB bolt pattern.

MRD/ELE-508 AXB mount - This should be a Spacecraft requirement on the alignment of the AXB mounting holes.

MRD/ELE-511 AXB S/C alignment knowledge has only a TBD

TIM 17 UCB, 8/15/2007

SEMP Review

SEMP 7417-9007 Version Aug 1 2007 General Comment is the document is “Boilerplate”

PBSR not represented on signature page 4

Figure overruns page boundary on page 13

Schedule shows Phase E as 2 years on page 15

MSE generally is involved in test review & variances

Unclear who/what the Mission Software and Data Systems engineer are overseeing. Instrument software?

Unclear who is on the Requirements CCB.

Trades table overruns page boundary on page 39

Interface Management p 41– What is “PLM”? Why is the “working group chairperson” the author of the ICD? Section 2.2.6 says the ISE does that.

Allocated Margins are lower than standard. Project is taking on risk.

Safety plan is obviously silly (page 47).