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Particles and Fields Package Quarterly Status Review (QSR) April 19, 2011

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Particles and Fields Package Quarterly Status Review (QSR) April 19, 2011. Dave Curtis, PFP PM. SSL Contracting Status. Funded through the end of April More info in the Business Splinter presentation. Schedule Status. EMs have made a lot of progress this month

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Particles and Fields Package

Quarterly Status Review (QSR)

April 19, 2011

Dave Curtis, PFP PM

ssl contracting status
SSL Contracting Status

Funded through the end of April

More info in the Business Splinter presentation

schedule status
Schedule Status

EMs have made a lot of progress this month

All EM PWBs in test but ~2 (HVPS boards, in fab)

SEP, LPW, SWEA, MAG EM mechanical assembly complete

STATIC EM TDC complete random vibe

SWIA/STATIC analyzers parts out to fab

EM Package I&T in progress

LPW, SEP, SWEA test with PFDPU complete

EM ‘Early Payload Test’ with LM complete

MAG next week

Pushing to complete before CDR

EM Instrument calibrations don’t complete till after Package I&T

STATIC is on critical path

13.6 weeks margin to delivery

Driven be delays in EM I&T

Status at instrument CDR

SWIA, STATIC EM will not be complete

SWIA, STATIC attenuator life test not done

SWIA, STATIC power converters may still be in test

Rest of instrument EM will be complete, with perhaps some system level test still in progress

  • RBSP-EFW instrument still not delivered – this month?
    • A number of problems encountered in thermal vacuum
    • Resolving those problems have impacted MAVEN power converter team, delayed STATIC & SWIA
  • We are still under planned FTE rate
    • but climbing a bit
    • Mostly due to people splitting time between projects
      • Note that 100% activity is often more than 40 hours/week in these cases
    • Plan was based on conservative assumptions about covering people

LPW, SEP, SWEA EM integrated with PFDPU EM

PFDPU EM Early Payload test with Spacecraft EM

SWEA Peer Review Completed

STATIC Random Vibration Completed

SEP Attenuator Life Test Completed

More in instrument sections…

ongoing work
Ongoing Work

Supporting Project planning process

Supporting EMC, Payload, SDT working groups

Completing EM board testing

Completing SWIA/STATIC EM mechanical part fabrication

Complete PF Package EM I&T

Prepare for CDR

trades issues
Trades, Issues

HV801 issue still open

Current plan is to buy HV801s from LADEE NMS, who has parts on order they no longer need.

We still don’t have the parts in hand

Working on an analysis to decide if the PFDPU mechanical design needs to be augmented to support the PWBs to avoid excessive displacements in vibe

Analysis complete, passed on to GSFC expert for review.

LPW Stacer Plating issue (NEW)

After plating stacer with black Nickel it no longer stows properly

Need plating for thermal reasons (aeroheating, thruster heating)

Historically we have used a paint (DAG213), but that will not survive atomic oxygen at Mars

Working with GSFC Materials on possible solutions

thermal status
Thermal Status

Received ‘Thermal Memos’ as well as spacecraft thermal model

Some of the instruments are in trouble according to the thermal memo

For example, STATIC goes to -100C

We are working on identifying if the issue is the model or the design

Our preliminary results are more benign

top risks
Top Risks

P-20 reduced (mating procedure)

pfp mass
PFP Mass

CCR262 approved to reallocate NTE amongst PFP

pfp power
PFP Power

Small increase in MAG power

Small decrease in SWEA power.

pfp data rate
PFP Data Rate

Per 2009-6-9 allocations from Bruce

New MAG requirements on telemetry formatting puts MAG 4% over allocation

requirements verification status
Requirements Verification Status

CCR (265) to update PFP Functional Requirements (Level 3) approved

some old requirements need updating

Verification matrix mostly complete

Have Functional, ERD, ICD requirements complete, in review

Boot software verification has started

against software level 5 requirements, which link back to FRD and ICD.

STATIC TOF EM Acoustics and Vibration test complete

All but coarsest grid with thinnest foils passed

Will not use coarsest grids

Will repeat on full EM and FM

EM Interface tests started

Reduces risk, not a qualification test

SEP Attenuator Mechanism Life Test complete

life testing
Life Testing

SEP Attenuator life test complete

4100 cycles on EM twice expected life

~1000 in air, ~3000 in vacuum

Will collect some more cycles over the next few months

SWIA, STATIC attenuator life test pending completion of EM attenuator


SWEA door mechanism identical to STEREO

SWEA, STATIC door mechanism functional, life test pending

LPW relay life test expected to start soon

LPW deployment life test expected to start soon

Stacer coating problem holding that up


MAVEN Magnetometer Status

April 2011

Connerney, Sheppard, Schnurr, Oliversen, Espley, etc.

gsfc mag accomplishments last month
GSFC/MAG - Accomplishments Last Month

EM sensor assembly, pigtail, GSE sensor harness completed.

Breakout PWBs fabrication completed.

Draft MAG Flight Software Requirements Specification (for PFDPU).

Completed Safe-to-Mate procedures for MAD board (MAVEN-MAG-PROC-0026).

Completed EM Magnetometer board scale factors calibration at GSFC 22’ MAG Test Site; scale factor resistors installed on board.

FPGA (rev 0) burned at Aeroflex, received and installed on MAD board. Functional testing in progress.

GSE (UCB emulator) development continues; CMD and TLM successfully flowing between GSE and MAD board.

Sensor non-magnetic heaters design received from vendor (Tayco), under review.

Frames for MAD board and ACHE board fabricated at GSFC; boards installed in frames (see pix).

gsfc mag accomplishments last month1
GSFC/MAG - Accomplishments Last Month

MAG Analog and Digital (MAD) Board & frame

A/C Heater Electronics

(ACHE) Board in frame ->

gsfc mag near term plans open issues
GSFC/MAG Near Term Plans & Open Issues

Mature MAG software requirements draft w/UCB.

Hypertronics KPC120 connectors installation and mating issues.

Radiation test plan for MIL spec CD4066 quad bilateral switches completed; testing scheduled to begin April 18, 2011.

Integration and test of MAG (MAD board and sensor) w/ PFDPU at UCB scheduled April 26-28, 2011.

MAD board frame modifications (test connector placement, mechanical mod for center board support) pending final approval.

Continue winding FM sensor ring cores, feedback/sense bobbins, and magnetic piece parts per technician availability; fabricate sensor assembly terminal boards.

Draft worst case analysis of MAD board.

MAG Peer Review scheduled for May 5, 2011 @ GSFC.

Workload: RBSP FM post-environmental test evaluation drags on; Juno FM system integration work in progress @ Astrotech, KSC.



April 2011

Jasper Halekas, SWIA Lead

swia progress
SWIA Progress
  • Electrical Progress
    • Anode and digital boards tested
    • Preamp/MCP loaded on preamp half
      • Preamp half integrated and in testing with digital
      • MCP half delayed by RBSP
    • LVPS mostly loaded, waiting for testing, delayed by RBSP
    • Sweep in testing
  • Mechanical Progress
    • E-Box fabricated and assembled
    • Analyzer in progress
      • Many major parts already out for fabrication
      • Final drawings being finished up
  • Detector Progress
    • MCPs in testing
      • Early results using spare THEMIS plates indicate anode board working nominally
swia issues
SWIA Issues
  • Staffing/Schedule
    • More RBSP delays hurting mechanical and power supplies
    • Mechanical parts may not all be done in time for peer reviews
    • Power supplies waiting for loading and testing
swia test data
SWIA Test Data
  • Anode counts from integrated test pulser correctly counted
  • P0, P1, P2 data products correctly generated by FPGA

Pseudo Data Products

Test pulser output

divided by four ratios,

sent to alternating








3-d Sky Plot



















Energy Spectra



April 2011

Dave Mitchell, SWEA Lead



  • Mechanical
    • Plating of external parts (Black-Ni, Gold, Alodyne) at Anoplate in New York.
      • Most parts delivered to SSL on 4/5 and passed magnetic screening (< 3 nT at 1 cm before and after exposure to >10-Gauss magnetizing field)
      • Black-Ni/Gold parts (lower deflector and interface tube) are delayed (expected 4/25)  Mechanical assembly at IRAP delayed ~3 weeks
  • Electrical: Amp, HV coupling, and HVPS boards assembled at Microtec – expecting delivery at IRAP on 4/19, then functional testing can begin.
  • AIT: Facilities in large clean room are in progress as scheduled (installed rolling table and tools, vacuum chamber expected week of 4/18)  on schedule for AIT

10 cm

upper deflector

toroidal grid

top cover

SWEA parts plated with high-P electroless black-Ni

Magnetic screening station at SSL


SWEA Status, EM - SSL

  • Mechanical: No change from last month: Pedestal fabrication and test fitting complete, ready to assemble when boards available
  • LVPC: Some voltages not within spec, and one exhibits and oscillation. Board will be reworked (~2-3 weeks).
  • Digital:
    • Fab complete and tested.
    • Housekeeping and Data messages from FPGA verified.
    • Test pulser demonstrates that counters working as expected.
    • Integration with PFDPU EM and functional tests on 4/13 successful

SWEA Electronics I&T


STEREO SWEA EM front-end boards




April 2011

Jim McFadden, STATIC Lead

static accomplishments
STATIC Accomplishments

Carbon foils mounted in TOF units survive vibration test – automated software used to evaluate foil breakage

Ordered carbon foils on mica slides to improve mounting yield

The design of START foil grid-frames was modified to compensate for poor clamping due to fabrication tolerances - new grid-frames ordered.

Design of attenuator motor completed, drawings for ETU in process

Energy analyzer/deflector parts drafted and ordered

EM TDC board bench testing complete, part modifications made

EM preamp 1 modified and working adequately for integration w/ TDC board – will be used while optimized preamp board is developed

EM Anode, Preamp and TDC boards integrated – working

EM Digital board passed power and PFDPU simulator interface testing, ready for interface test with TDC

EM Sweep HV board partly loaded and in test (see pictures)

Clean room equipment installed – racks, SS table, GN2 purge, etc.

Helmholtz coil template fabricated, waiting on welding before assembly

static open issues
STATIC Open Issues

One of two TOF electrical connections broke in 1 of the 3 units during vibration test (see pics) – connection redesigned for stress relief

Mounting fixtures for handling flight carbon foil frames need to be fabricated before additional EM carbon foils are loaded

New START foil grid-frames will require inspections after fabrication

Preamp design changes nearly complete for optimal dynamic range – may require new layout

EM 15kV-MCP board changed, MCP “stack stick” multiplier abandoned in favor of a pair of VMI multipliers and a tapped transformer – EM waiting on part placement changes (Berg).

Digital board FPGA still in development

EM LVPS loaded – waiting to be tested

Manipulator fixtures for calibration chamber testing in development

Some test harnesses and test cables still on order

New calibration chamber ordered – delivery late May

SS sink for clean room assembled – waiting for drain assembly



April, 2011

Davin Larson, SEP Lead

sep accomplishments 2011 04 12
SEP Accomplishments2011-04-12

Mechanical attenuator tests completed

~4500 cycles completed (all but ~1000 in vacuum)

Integration of DAP board (& ½ sensor sans detectors) with PFDPU begun on 2011-04-11

Safe to mate –ok

Initial power on - ok

but receiving +6V and -6.3 volts instead of nominal +/- 5V

Command test – ok

Successfully turned on test pulser

Bias voltage setting not working (not yet functional on DAP?

Telemetry tests – ok

Successful run of ‘SEP_DAPINIT’

Unbalanced analog voltages result in offset from baseline

Successful run of “SEP_THRESH_SWEEP”

Successful run of “SEP_TPSWEEP”

Some cross talk visable that was not seen with MISG

Noise level is substantially larger and assymetric

Timing Tests – skipped

SEP Aperture tests – ok

SEP auto aperture closure – problem on REG

SEP power inrush current test - OK

ETU Silicon detectors (1 stack) delivered on 2011-04-12.

DAP board

3 channels loaded on DAP #1

12 channels loaded on DAP #2

Actel programming: Using FPGA version 0x32

sep pfdpu interface test data
SEP PFDPU Interface Test Data

Increased noise

(and asymmetric)

Data collected through PFDPU in APID 30


Cross talk?

attenuator life test
Attenuator life test

Life tests were done on 3 separate days.

TCP/IP connection from computer to MISG was unreliable.

Difference in actuation time is probably temperature related.

attenuator stroke vs bus voltage
Attenuator Stroke vs. bus voltage

Tested the range of bus voltages that would cause actuation.

Below 22 V (2.08 V across nanomuscle), actuation failed in air.

sep open issues
SEP Open issues

What voltage to use for +/- 5VA supply.

Analog supply NOT currently regulated

Need secondary regulation for A250?

Eliminate requirement of 5V Digital altogether

Mods needed for flight DAP board:

Use faster transisters on pulse generator (fixes 3.3 volt logic problem)

Use 2.5V reference instead of 5VA for baseline trim

Use Valid signal for hysteresis on peak detect

Gain change on peak detect circuit (perhaps not needed now)

Switch from 10 MΩ to 1MΩ resister on bias voltage control

5 MΩ resistor to -5VA (-2.5R?) to correct for OpAmp input current (this mod is questionable if BLRena mode is working properly)


Add detectors!!!!

Insert caps on attenuator lines to clean up some noise

FPGA Mods from version 0x32

Eliminate secondary pulse by applying BLRena for 6 μsec on test pulse return

Extend test pulse duration from 10 μsec to 20 μsec

16 bit counters on no peak counters

Ability to turn off housekeeping measurement

Event mode resolution


Purchase new nimbin and test pulser to replace AWOL test pulser

Test for correct coincidence determination with FPGA

New radiation source

PFDPU testing

Cross talk observed in PFDPU but not MISG?

Increased Noise observed in PFDPU (probably resolved with shield boards)

Telemetry dropouts from PFDPU science packets

Possible change in opto coupler wiring of actuator control on DCB to eliminate any possibility of noise

Baseline shift at high count rates – (probably not an issue)

1 mv shift in baseline shortly after the 1 pps signal

More to come


MAVEN PFP DCB, Power Converter & GSE Status

April 2011

Dorothy Gordon

Timothy Quinn

Peter Berg

Chris Tiu

pfdpu dcb status

PFDPU Overall Integration


Functional and electrical verification ongoing

Actuator Control, Housekeeping, Instrument Current Monitoring


Verified LPW signal routing through IIB and Low Voltage Power Supply

DCB/REG/IIB/LPW (see next page)

Upcoming PFDPU integration tests

Remaining power services and signal routing to be checked on a per instrument basis

pfdpu dcb status 2
PFDPU/DCB Status (2)



Power-switch, current monitoring on REG

Operation of LPW via the Supplies IIB LVPS

LPW/DCB Interaction via serial interface

Operation of the EUV Door Actuator

LPW Data analyzed for noise and anomalies

10 Hz – 4Vpk-pk

1KHz – 4Vpk-pk

100KHz – 4Vpk-pk

pfdpu dcb status 3
PFDPU/DCB Status (3)

PFDPU – S/C Interface Test

DCB/REG Verification at Lockheed-Martin

Integrated power subsystem

Inrush current characterized

Tested S/C Discrete commands and Side Select

Reset, TIME commands verified

Operated PFDPU with the Lockheed-Martin Spacecraft Emulator

Verified signal protocol of RS422 command and telemetry interfaces

Operation with Flight Software – sent a variety of packets in order to work through the checksum generation algorithm. FSW is working this issue with Lockheed-Martin.

dcb status
DCB Status


DCB ETU #2 Build complete

Delivered (along with FLASH FPGA daughter board)

Short on main DCB power supply (3.3V)

Problem needs to be identified and fixed


Changes added to support the S/C interface modifications

Functional design is complete; undergoing life-test with flight software and PFDPU Integration

gse hardware status
GSE Hardware Status

MISG Instrument Simulator

First cut operational instrument simulator delivered

uses the MISG-FPGA Block RAM

Implements the final Instrument Mode functionality

covers all 8 Instrument Interfaces

with a subset of the final pattern generator buffer space

Next Steps

Use MISG based SDRAM for Instrument Pattern storage (allowing for increased buffer space)

Incorporate new modules into next MISG-FPGA release

gse software status
GSE Software Status


Software updated to handle special case where calculated checksum equals zero. When this occurs checksum is set to 0xFFFF


Python modules added to perform checksum processing and verification on PFDPU telemetry

Python module added to support PFDPU Memory Loads

Delivered first rev of STATIC configuration

Created Python module for playing back raw data over TCP link with GSEOS

Supported LPW EM integration testing

power converter status 1
Power Converter Status (1)

REG Board

We are working on a second PCB layout for the REG board ETU#2 due to a connector mis-wiring issue on the first layout. This re-layout process has begun.

The REG board tester was built and is now in operation

All REG based switchable services have been tested

Still pending: adjustment/tuning of the current monitoring subsystem; complete verification of the digital portion of the circuit

REG Board system checkout via PFDPU I/F Tests

DCB Interface/Housekeeping addressing

Instrument Power Switches

power converter status 2
Power Converter Status (2)

IIB board

All power converter sections of the EM board have been tested with only the magnetics of MAG2 and off board connectors for STATIC, SWIA, and MAG left to be populated.  (This excludes the MAG HEATER daughter boards from Goddard that are to be mounted on the IIB at a later date.)

The ±90V outputs on the LPW section sat at 114V when integrated with the system.  This would indicate an unloaded state as the voltage would normally drop closer to ±90V when loaded (10mA peak).

The 5VD regulator on the SEP section will be changed to an LDO as the actual load is much lower with the system.  The LTC1877 may have stability issues with such a low load.

ACTEL turn-off delay circuit for the LPW section will be added and tested on the EM board.

Optimization for noise, efficiency, and voltage levels will also be done after and in between integration.

concerns issues

PC104 Connectors

One of the Hypertronics PC104 connectors delivered to us appear to have been assembled incorrectly

Connectors are very fragile, pins have bent and even broken during our ETU testing

We have implemented a mating procedure to mitigate this issue

We still need to verify the connection insertion is met with the boards installed in their frames


Schedule for testing is tight

As the integration progresses, we are finding issues that require resolution (e.g. power supply regulation, clock distribution). We need time to sort through all the open-items (hopefully prior to CDR) yet the individual subsystem testing/tuning is still ongoing.


MAVEN PFP Flight Software Status

April 12 2011

Peter Harvey

boot status
Boot Status
  • Interface Documents, Meetings
    • Reviewed PFEPTPlan.
  • IV&V
    • 3/31/11 Discussion confirmed Boot Requirements OK
  • FSW Development
    • Added temporary diagnostic outputs to support PFEPTPlan at LM
    • Removed automatic safing sequence since S/C will not be sending ZoneAlerts
    • “Inverted” checksum logic w/ no-0000 allowed logic added to CMD and TM
  • Test Status
    • All Boot Packets are Displayed in RealTime, Hot Buttons installed
    • Retested with DCB FPGA update revision 07 and 08
    • PF-Spacecraft Simulator (PFEPT) test support at LM
    • CMD Rate Test to be Repeated when GSEOS can support it
    • Formal Test Scripts to be Developed
    • Module tests
    • Comprehensive Performance
  • Dates coming up
    • August - PROM Burn
operational status
Operational Status
  • Interface Documents, Meetings
    • Reviewed DFB specification rev J – OK. Implemented changes to IO regs
    • Reviewed SEP specifications rev B, C, D – OK. Supported SEP.c development
    • Reviewed “MAG software requirements” – Not OK. Conflicts with FSW-010
  • IV&V
    • Reviewed IV&V comments w.r.t Operational - OK
  • FSW Development
    • SSR - Developed Generic Message-APID software for I&T tests (SEP,SWEA,SWIA, STA)
    • Wrote MAG Build1 & Build2 software (before requirements change)
    • Wrote SEP Build1*
    • Wrote STATIC, SWEA, SWIA Build1 software
  • Test Status
    • LPW, SSR(RealTime) simulations completed
    • LPW EM I&T test support
    • MAG simulations completed
    • SEP Build1 simulations complete,
    • SEP Build1 DCB/REG/IIB/SEP EM I&T complete
    • STA Build1 simulation – 50% complete. AHSK to be done
    • SWIA, SWEA Build1 simulations to be done shortly.
  • Important Dates coming up
    • April 11 2011 – Interface test with SEP
    • April 13 2011 – Interface test with SWEA
    • April 27 2011 – Interface test with MAG
  • *: Build1 supports ETU-level I&T tests
test environment
Test Environment
  • GSEOS Status:
    • Generally functional though issues internal error messages, and crashes periodically
    • Added APID 11 (Memory Loads)
    • Needs Zone Alerts (for compatibility)
    • Needs 30 ms delay between messages (per ICD)
    • Limit checking error messages (uses raw values, not converted)
    • Updated New Checksum needs to be checking all telemetry
  • GSEOS Python Test Scripts, Displays
    • Developed SEP, SWEA, SWIA, STATIC EMIT Test scripts
    • Included/modified SEP HSK displays for EMIT test
    • Include/modify SWEA HSK displays for EMIT test
    • Include/modify SWIA HSK displays for EMIT test
    • Include/modify STATIC HSK displays for EMIT test
    • MAG has not updated scripts, HSK display (according to SVN)
  • FSW Development Platform:
    • DCB EM2 Built, tests are in progress
    • Regulation board built
    • Instrument Simulator Functional
    • Test Scripts for Instrument Simulation being built ( LPW, SEP tested so far)
    • PROM emulator
    • ESD mat, wrist-straps etc installed in Rm 124 (my office)
fever chart
Fever Chart
  • MAG delivered a completely new version of software requirements, conflicting with implemented software.