1PFP MSR, 03/16/2010

Particles and Fields PackageMonthly Status Review (MSR)

March 16, 2010

Dave Curtis, PFP PM

2PFP MSR, 03/16/2010

SSL Contracting Status

• Phase RR contract mod funding provided should carry us through March.

• Phase B/C/D Contract negotiations still pending

3PFP MSR, 03/16/2010

Schedule Status

• Scheduler now working MAVEN part time– Expected to transition to full time this month.– She has started extracting instrument level schedules from the

master schedule• PFDPU schedule delivered

• Next key schedule milestone is finalizing parts lists by 4/15

4PFP MSR, 03/16/2010

Manpower

• Continue ramping up– Closing in on new hires

• SEP EE• Power Converter support• SWIA/STATIC additional ME support

• QA team is short– Ron Jackson still out due to injuries

• Return now no sooner than June– Meanwhile SSL QA team is stretched thin with current work

• Jorg Fischer is taking the lead for now– A QA Audit of SSL is planed for April, further stretching the team– Looking for short term help – have feelers out to local institutions

(LBNL, Stanford, etc).

• Scheduler full time this month!

5PFP MSR, 03/16/2010

Manpower [2]

• Thermal Support is thin– Having trouble getting enough attention from the Thermal

Engineer• He got sucked into SPP proposal work, which will delay delivery of

thermal models.– SWEA modeling of thruster heating mitigations, instrument

preliminary models coming due– Requested GSFC support (for SWEA thermal)

6PFP MSR, 03/16/2010

Accomplishments

• Developed Descope list with potential savings ROM• Provided first MICDs (LPW, EUV, SEP)• Provided draft connector list and pinouts, interacted with

LM on details• Provided purge requirements after encapsulation• More in instrument sections…

7PFP MSR, 03/16/2010

Ongoing Work

• Supporting Project planning process• Supporting EMC, Payload, SDT working groups• Supporting ICD development

– MICD development in progress

• Instrument specifications in review• Flight Software Requirements in review with instrument

leads– Level 5 specification in work

• MAIP telecon with Project QA pending• Parts selection and redesign to replace commercial with

high rel parts (mostly STATIC)• Started work of PFP FTA• MICDs and Thermal Models in work• Working with LM on LPW relocation to avoid thruster

heating

8PFP MSR, 03/16/2010

Ongoing Trades

• Second STATIC still under consideration– Alternative of keeping STATIC non-redundant involves added

risk, significant extra reliability analysis work which will have to start soon

• PFDPU form factor, number of boards– Determining optimum board size to minimize mass within system

design constraints– So far existing design not broken, but work not yet complete– An increase is possible as a number of boards are constrained

for space – would have a mass impact

9PFP MSR, 03/16/2010

Issues

• SEP FOV Issue (APP impingement)– Working with LM – longer APP boom improves the situation, but

things are still changing• SWEA Thruster, Aero heating

– LM Rotated SWEA boom back to 45 degrees to Sun line to limit thruster heating of SWEA

– Need to modify thermal characteristics of surfaces in SWEA aperture to avoid excessive heating - candidate solutions in work

• MAG issues meeting requirements with proximity to solar array– Juno qual panel tests indicates we have a problem– LM Palo Alto layups even worse– Magnetics Working Group considering options

• LPW boom thruster heating– Working to model heating, find a cooler location

10PFP MSR, 03/16/2010

Issues [2]

• PFP SSL Parts costing at GSFC is significantly higher than planned– Most of the difference is in radiation testing– Need to decide on project policy for ELDRS (significant cost,

questionable value added)– We should consider moving some radiation testing back to SSL

• High rate TID for parts SSL has ability to perform adequate functional testing

• SEL testing @ LBNL• Significantly cheaper than current GSFC estimate

11PFP MSR, 03/16/2010

Top Risks

New: P10

MAVEN PFP RISK MANAGEMENT Chg RANK ID Approach TITLE

* 1 P-10 Watch Operational Heaters

55 10 15 20 25

2 P-04 Research Solar Array Magnetics

44 8 12 16 20

3 P-01 Watch SSL Manpower

33 8 9 12 15

4 P-03 Watch Technical Resource Margins

22 4 6 8 10

5 P-02 Watch SSL MAIP, SDP

11 2 3 4 5

* 6 P-09 Watch STATIC Reliability

1 2 3 4 5

Criticality Approach

High

Medium

Low

LIKELIHOOD

Improved

Worsening

Unchanged

New this month

Mitigate

Watch

Accept

Research

CONSEQUENCES

L * C Trend

*

P1

P2

P4

P3

P10P9

12PFP MSR, 03/16/2010

Risk List [1]

ID Title Type P I Crit Risk Statement Impact Term Plan Approach Comments

P-01 SSL ManpowerProject

Execution3 3 M

Delays in RBSP leads to manpower conflicts at SSL

Schedule erosion, cost to recover

Mid Term

Hire new people to take routine tasks off key personnel

Watch Review in March 2010Add extra Power Converter person 1/2010Add extra ME 2/2010Ongoing QA problem

P-02 SSL MAIP, SDPProject

Execution4 2 M

Disconnects between MAR and SSL MAIP or Software Development Plan result in cost increases, potential technical risk due to distraction of key personnel

Cost Mid Term

SSL MAIP, SDP review by Project

Watch Pending Project Meeting to resolve review comments

P-03Technical Resource Margins

Project Execution

2 4 M

Requirements flowdown and preliminary design results in instrument resource growth

Mass, Power Mid Term

Proceed with specifications and design, watch resource requirements

Watch

P-04Solar Array Magnetics

Mission Performance

3 4 M

Proximity of MAG sensor to solar arrays results in not meeting the magnetics requriements

Magnetics [MRD84]

Near Term

Analyze Juno test panel performance. Consider ways to increase distance between MAG and cells

Research Magnetics Working Group working on options

P-05 Sun in SEP FOVMission

Performance2 3 L

Sunlight in SEP FOV can damage the detector

Loss of part of the SEP measurement

Far Term

Design sun safing into spacecraft and instrument

Mitigate Mitigation scheme not fully defined

P-06HV Arc during

deep dipMission

Performance2 3 L

HV discharge in SWEA, SWIA, or STATIC during deep dip

Potential loss of instrument

Far Term

Power off instrument HV for deep dip or when pressure exceeds threshold or in SAFE mode

Research Science justificastion for keeping STATIC on during deep dips. Schemes to automatically safe based on pressure measurement on board in review

P-07Delayed LPW

Boom Deployment

Mission Performance

2 3 L

Waiting till after MOI to deploy LPW booms results in them sitting undeployed for over a year, increasing the risk of deployment failure

Potential severe degradation of LPW measurement

Far Term

Investigate if LPW booms can be deployed early

Research Early deployment of LPW booms reduces this risk. If that is not possible, a test to verify the booms deploy after a year of soak might be considered, but is expensive and logistically difficult

13PFP MSR, 03/16/2010

Risks List [2]

ID Title Type P I Crit Risk Statement Impact Term Plan Approach Comments

P-08

EUV sensor damaged by exposure to atmosphere

Mission Performance

2 3 L

If EUV does not close its door before deep dips (or any periapsis where EUV points into the RAM direction) sensor can be damaged

Degradation of EUV Lyman Alpha sensor

Far Term

- Include EUV door close to instrument autonomy rules.- Add MOC/SOC flight rule to reduce risk that human error results in incorrect operational script

Mitigate

P-09STATIC

ReliabilityProject

Execution4 2 M

If a second STATIC is not implemented, STATIC becomes mission critical, requiring addional relaibility work and potential hardware changes not included in the SSL budget

Cost, Schedule Near Term

Put off starting work on STATIC reliability issues until decision made on second STATIC

Watch Some work should be done prior to PDR

P-10Operational

HeatersProject

Execution4 4 H

If operational heater reequirement to survive eclipse is significant, could impact power budget

Power Mid Term

Pending thermal analysis Watch Pending thermal models, spacecraft environments (after PDR)

P-11LPW Boom

Thruster Heating

Mission Performance

2 4 M

If thruster heating of LPW booms excessive, could damage boom harness

Potential loss of LPM measurement

Near Term

Thermal analysis, thruster plume analysis, boom relocation all in work

Mitigate

P-12SWEA Thruster

HeatingMission

Performance2 4 M

If thruster heating of SWEA is excessive, could damage instrument

Potential loss of SWEA measurement

Near Term

Thermal analysis and surface treatment selection in work

Mitigate Need thermal engineering help

14PFP MSR, 03/16/2010

PFP Mass

• No change from last month

• Liens:– Second STATIC, ~3.69Kg (plus a small increment to PFDPU for

additional interface), if approved– PFDPU possible increased board size, ~1kg (TBR)

Instrument QuantityCBE Each

[kg]CBE

Total [kg] Cont. (%)Total [kg] (CBE+cnt)

Particles and Fields 20.69 29% 26.59LPW Total 5.98 8% 6.48

LPW Booms 2 5.176 18% 6.120EUV Assembly 1 0.800 -55% 0.360

STATIC Total 2.35 57% 3.69SWEA Total 1.62 20% 1.94SWIA Total 2.06 3% 2.12SEP Total 1.23 20% 1.47MAG Total 0.65 20% 0.78PFDPU Total 4.78 20% 5.74PF Intra-Instrument Harness Total 2.03 115% 4.37

15PFP MSR, 03/16/2010

Mass Tracking Chart

PFP Mass Trend

15.00

20.00

25.00

30.00

35.00

10/1/2009 10/21/2009 11/10/2009 11/30/2009 12/20/2009 1/9/2010 1/29/2010 2/18/2010

Date

kg

15%

20%

25%

30%

35%

Mass CBE, kg

Mass NTE, kg

Mass Margin %

16PFP MSR, 03/16/2010

PFP Power

• No change since last month• Liens:

– Second STATIC: 5.75W– Expect to need operational heat during eclipse

• None allocated, amount needed pending thermal analysis

Instrument CBE [W] Cont. (%)Total [W]

(CBE+cnt)Particles and Fields

Off (heater only) 8.03 23% 9.90Standby 11.69 22% 14.27Nominal 19.46 19% 23.23

Peak 30.04 20% 36.10Orbit Average 19.56 19% 23.35

Orbit Average:LPW/EUV 4.66 12% 5.24STATIC 4.42 30% 5.75SWEA 0.96 20% 1.16SWIA 1.64 7% 1.76SEP 1.88 20% 2.26MAG 3.03 20% 3.63PFDPU 2.96 20% 3.56

17PFP MSR, 03/16/2010

PFP Power Trend

PFP Power Trend

15

20

25

30

10/1/2009 10/21/2009 11/10/2009 11/30/2009 12/20/2009 1/9/2010 1/29/2010 2/18/2010

Date

W

15%

20%

25%

30%

Power CBE, W

Power NTE, W

Power Margin %

18PFP MSR, 03/16/2010

PFP Data Rate

• Per 2009-6-9 allocations from Bruce

Rate [bps]Particles and FieldsLPW/EUV 717.0STATIC 2000.0SWEA 600.0SWIA 604.0SEP 160.0MAG 660.0PFDPU 30.0

Total 4771.0

Instrument

19PFP MSR, 03/16/2010

MAVEN Magnetometer Status

March 10, 2010

Connerney, Schnurr, Sheppard, etc.

20PFP MSR, 03/16/2010

GSFC/MAG - Accomplishments in February

• MAG instrument definition

• Instrument specification – first draft (Rev 0) sent to SSL

• MAG instrument block diagram completed (Rev 0)

• MAG logic block diagram completed (Rev 0)

• MAG digital interface agreed upon with SSL

• MAG voltage requirements defined and power distribution block

diagram completed (Rev 0)

• MAG schematics and board area study started, including the

possibility of partitioning the AC heater circuit on a separate

PCB from the analog sensor circuitry (like STEREO)

• Parts selection started, including identification of long lead time

items.

21PFP MSR, 03/16/2010

Near Term Plans & Open Issues

• MAG pre-PDR Peer Review planning in progress– Working dates availability with reviewers Steve Battel and

Jeremy Karsch– Looking at May 25 and possibly May 28 (Battel availability)

• No Open Issues

22PFP MSR, 03/16/2010

MAVEN PFP SWIA Status

March 2010

Jasper Halekas, SWIA Lead

23PFP MSR, 03/16/2010

SWIA Progress

• Fifth revision of instrument specifications– Updated outer grid and post design– Updated baseline anode and MCP mounting scheme

• Agreed on preliminary packaging, harnessing, and interconnect schemes

• Reviewed FSW specifications• Reviewed third revision of block diagram• Reviewed first draft schematics for digital board• Got additional part time mechanical help for

SWIA/STATIC (Greg Dalton)• Started Bill Elliott working on mechanical details of

anode/MCP mounting (biggest outstanding issue in mechanical design)• Should be ready with currents/voltages for power

supply design

24PFP MSR, 03/16/2010

SWIA Issues

• Staffing– Still light on mechanical engineer time, but should be ready for

PDR if we can progress quickly on anode/MCP mounting• New hire ME job posted to augment team

– Thermal modeling not started yet• Chris Smith overloaded with other work• Important issues regarding deflector coating and need for heater

power to resolve

• Long Lead Parts– Probably need to start thinking about ordering A121 preamps

• Can take up to a year to get• Hardly any spares from previous missions to use in testing

– MCPs

25PFP MSR, 03/16/2010

MAVEN PFP STATIC Status

March 2010

Jim McFadden, STATIC Lead

26PFP MSR, 03/16/2010

STATIC STATUS

• Instrument specification documents iterated twice and delivered• Flight software requirements reviewed handed off to Flight software

engineer• FPGA requirements reviewed, recommended changes provided to

systems engineer• New ME (1/2 time) has been brought up to speed to take over from

Bill Elliott. Additional ME (new hire) pending• Prototype grids for carbon foils evaluated and new fabrication

instructions developed.• Radii for aperture housing and angle separation of dual-posts

finalized (optics simulation)• Carbon foil mounting scheme being developed (Marckwordt)• Parts list being re-evaluated to reduce qualification costs• Testing on Digital board and HV SWP board continuing.

27PFP MSR, 03/16/2010

STATIC Schedule Status

• Completed Schedule Items– Instrument Specification / Flowdown– STATIC software requirement for PFDPU– STATIC harness specification– ESA Deflector Optics Design

• Incomplete Schedule Items– STATIC Preliminary Thermal design. Reason - Thermal design engineer still unavailable.

Expected start date is 1-2 weeks. – STATIC packaging / interconnect design. Reason - Haven't settled on TDC to Digital board

connectors. Not time critical and should get decided in the next couple weeks.– STATIC MCP specification and order. Reason - No immediate need since we have prototype

MCPs.– Anode, Preamp, TDC EM Design update and parts selection. Reason - High parts

qualification costs led to re-evaluation of the parts list. Selections are waiting on design engineer currently on travel. Selection is expected to complete in a couple weeks. Delays are not critical layout and fab are not scheduled until after PDR.

– Update TOF 15kV/MCP HVPS Reason - HVPS engineer unavailable. This was on the fast track and the design/development need only be completed by PDR.

• Started Schedule Items– Sweep HVPS - prototype testing is continuing– Digital board prototype testing and design are continuing– LVPC - Specification provided to LVPS engineer – ESA Mechanical Design - new ME taking over aperture closer mechanism. This is behind

schedule for a March 17 completion. Required completion date is prior to PDR.– Anode, Preamp, TDC EM Layout Mods - These are due in a couple weeks and are behind

schedule, but really not needed until after PDR. Layout changes are waiting on part finalization.

28PFP MSR, 03/16/2010

STATIC Issues

• Second STATIC issue needs to be resolved soon– Impacts Reliability analyses

29PFP MSR, 03/16/2010

MAVEN PFP SWEA Status

March 2010

Dave Mitchell, SWEA Lead

30PFP MSR, 03/16/2010

SWEA Status

• SWEA Design– Instrument Specification – draft complete, under revision

– SSL/CESR ICD – done

– Identify changes to STEREO SWEA – done

– Software Requirements – draft complete, under revision

– Harness Specification - done

– Packaging/Interconnect Design - done

• SWEA Digital– Digital Design – done

– Parts Selection and Digital Schematic• draft nearly complete (due 3/17)

• SWEA SSL Mechanical Design– Electronics box mechanical design – done

31PFP MSR, 03/16/2010

• Minor changes to the STEREO SWEA design are under study:– S

– Simulations are underway to determine if a slight shift of the deflectors along the symmetry axis improves the angular response.

– Rough calculations show that high emissivity coatings for the deflectors and toroidal grids are needed. Candidates have been identified (e.g., black chrome). More detailed thermal calculations are needed.

• SWEA Preliminary Thermal Design (due 2/3/10)– Behind schedule because of lack of thermal engineering support, which

should become available later this month.

SWEA Work in Progress

Simulations show that scalloping the inner and outer hemispheres improves the scattered electron suppression. The optimal type of scalloping (rounded or saw tooth) is under study.

32PFP MSR, 03/16/2010

MAVEN PFP SEP Status

March 2010

Davin Larson, SEP Lead

33PFP MSR, 03/16/2010

SEP Accomplishments

• Began modification of FPGA specs-– Reconfiguration to 2 identical actels – Baseline burst mode developed– Learned that DAP board must measure it own analog housekeeping

• Mechanical discussions– Explored change of connectors appears that 15 pin cannon may be to tight to fit.

Must either:• Use MDM connectors• Extend length of box.

• Decision on Bias supply circuitry (mostly) made:– Strongly leaning toward capacitor diode stack instead of magnetics.

• Considered radiation problem for preamps: – Baseline is now A250F for preamp but using +/- 5 volts – Rough estimate of increase in power is small

• IDPU Board dimensions – Quick comparison of THEMIS vs STEREO board dimensions suggests it will not

be a problem.• EE job application listed

– two candidates chosen to interview next Friday• Specs sheet turned in.• Discussion of nano-muscle took place:

– see no need for change will probably stick with old design.• Software requirements discussed on 3-12

– added 2.5 requirements. (one requirement turned into requirement on FPGA)

34PFP MSR, 03/16/2010

SEP Open issues

• FOV issues no longer resolved.• SPEC sheet still needs a review• Finish modifying FPGA spec• Have not decided on connector for sensors

– Trade study MDM vs high density cannon.• Better power estimate required. (must include power for shaping

chain.)• IDPU Board dimensions – More accurate area estimate must await

board layout.• EE job interview ahead

35PFP MSR, 03/16/2010

MAVEN PFP PFDPU/GSE Status

March 2010

Dorothy Gordon, Peter Berg, Tim Quinn, Harvey

36PFP MSR, 03/16/2010

PFDPU Status

• Processor Board (DCB) specification in progress– ColdFire IP Core incorporated in an Actel FPGA– ProASIC FLASH part planned for Engineering Units (ETU)– RTAX2000S (Fused FPGA) planned for flight

• ColdFire Core Utilization (including mult, div. and BDM debug module):– SEQUENTIAL (R-cells) Used: 2930 Total: 10752 (27.25%)– COMB (C-cells) Used: 8492 Total: 21504 (39.49%)– LOGIC (R+C cells) Used: 11422 Total: 32256 (35.41%)– RAM/FIFO Used: 0 Total: 64

– FPGA daughter board facilitates testing of either FLASH or Fused FPGAs

– PFDPU FPGA also includes Instrument Interfaces, Processor-Memory Bus Control/Registers, FLASH Memory Control, Timing Subsystem and Spacecraft Interface

– Memory sizing in progress by the Software Lead.

• Software development tools– Freescale CodeWarrior Development suite is undergoing evaluation by

the Software Lead. The initial results are promising.

37PFP MSR, 03/16/2010

Flight Software Status

• Updated Software Development Plan in progress– Responding to Tom Jackson comments

• Flight Software Requirements (Level 4) reviewed with Instrument Leads

• Level 5 flow-down in progress• Memory Sizing task in progress• Development tools evaluated

– Code size strongly dependent on usage of local vs global memory access

• Requirements Review planned for mid April• Peer Review planned for May 12

38PFP MSR, 03/16/2010

GSE Status (1)

• The MISG* Ethernet I/F Board (ZestET1) is being exercised with test code– Ethernet controller with user configurable FPGA

• Host Interface verified with pattern generator utility

– FPGA to emulate MAVEN PFDPU and Instrument

• The MISG Specification first release and preliminary schematics for the Base (Interface) Board are being reviewed.

Base (Interface) Board

ZEST-ET1 Module

Ethernet EngineDDR SDRAM (32 MBytes)

Instrument Interface(when MISG is

configured in PFDPUMode)

PFDPU Interface (when MISG is configured in

Instrument Mode)

Xilinx FPGAProgrammable Clock

DDR SDRAM (64 MBytes)

CLK, CMD(from PFDPU)TLM (to PFDPU)

Ethernet (RJ45) to Host Computer

CLK, CMD(from PFDPU)

TLM (to PFDPU)

Per Instrument

Actuator Control ACTLP(1:0)ARTN

ACTPwr(28VDC)

Instrument PwrSwitch

InstPwr (28VDC)

IPWRRTNINSTSWPWR

PSSYNCHCLK8M

*MAVEN Instrument Simulator / PFDPU Simulator

39PFP MSR, 03/16/2010

GSE Status (2)

• GSE application development work continues– Receiving test data from the ZestET1 (Ethernet Data reception) – GSEOS data parsing has begun using data generated by the

STATIC Prototype Board

• Next Steps– Layout/fabrication of Base GSE board– MISG FPGA development– Further testing with Host Code and integration with GSEOS