MAVEN CDR May 23-25, 2011 Particles and Fields Package Peer Review May 8 -10, 2011 Christopher Smith, Thermal Engineer Mars Atmosphere and Volatile EvolutioN

MAVEN CDR May 23-25, 2011

Particles and Fields PackagePeer Review

May 8 -10, 2011

Christopher Smith, Thermal Engineer

Mars Atmosphere and Volatile EvolutioN (MAVEN) Mission

7-2MAVEN Peer Review May 08-10, 2011

Initial Work Flow

• UCB builds individual instrument thermal models– SWIA, STATIC, SEP, LPW, PFDPU, and SWEA

• UCB submits these models to spacecraft provider (LM) who incorporates them into the spacecraft thermal model.

• LM generates sink couplings for each instrument node for environments and delivers these to UCB

• UCB incorporates LM environments and goes through a design cycle to meet ERD requirements.

• UCB returns new generation of instrument models to LM. Cycle repeats as necessary

• LM responsible for producing official predicts for mission


Interface Issues

• LM unhappy with UCB thermal models– LM required, and UCB agreed to, ~50 node instrument models– UCB thermal engineer provided ~200 to 300 node instrument models– LM chooses to reduce UCB thermal models in house due to limited thermal

support by UCB at the time• LM provides results and sinks back to UCB for the reduced

instrument model– UCB not happy because this requires a lot of monkeying around to get to work

with full instrument models– UCB not happy with only hot and cold case sinks provided– LM reduced thermal models contain potential for error as they were not produced

by UCB• After much discussion LM releases full spacecraft model for use by

the instrument teams– Includes their full case set definitions


Current Work Flow

• UCB builds individual instrument thermal models (DONE)– SWIA, STATIC, SEP, LPW, PFDPU, and SWEA

• LM provides sink temperatures for UCB boundary node spacecraft– UCB modifies instruments to meet requirements in all provided environments

(DONE)• UCB submits these models to spacecraft provider (LM) who

incorporates them into the spacecraft thermal model. (DONE)• LM returns spacecraft thermal model with integrated instrument

models (DONE)– LM had some issues, so far it looks like they are all modeling problems with the

reduced instrument models (IN PROGRESS)• UCB uses spacecraft model to address any issues and returns

updates to LM (IN PROGRESS)• LM responsible for producing official predicts for mission


Current Status

• Not yet at CDR level with instrument predicts (Complete By CDR)– Spacecraft model running at UCB with full instrument models integrated– All the gross errors are worked out but needs more work to assure everything is

running well• Deep Dip and Thruster heating still in spreadsheet form (Complete

By CDR)– Spacecraft case sets include proper deep dip environments– Need to add thruster heating

• LPW boom thermal treatment un-resolved – Black Nickel originally specified but it alters the mechanical behavior of the boom– DAG 213 a possibility but susceptible to AO degradation– Without a high emissivity surface stacer over heats in deep dips

• PFDPU board analysis not complete (Complete By CDR?)– RBSP LVPS board overheating– No real board level thermal analysis done for RBSP– Issues with RBSP need to be addressed on PFDPU boards


Environmental Loads

• Values above from LM Case Sets

• Thruster flux combination of ACS and TCM firings

Phase

Solar Flux (W/m2) Albedo IR (K) Aero

Min Max Min Max Min MaxFlux

(W/m2)Time (min)

Launch 1319 1387 0.29 0.32 221 262 1135 1

Cruise 649 1480 0 273

MOI 658 664 0.18 0.18 148 148

Mars 490 710 0.14 0.35 204 218

Deep Dip 710 710 0.35 0.35 218 218 1000 10

Instrument

Thruster Plume

Flux (W/m2) Time (min)

SWIA 30 10SEP 30 10

LPW Stacer 300 10LPW PreAmp 30 10

LPW Whip 300 10SWEA 300 10


Optical Properties

• All Materials approved by GSFC and JPL on previous missions• Added testing for AO exposure• Clear Alodine done by one plater with specified soak time.

Extensive sampling with THEMIS. Occasional sampling with other missions. Wide BOL/EOL variance assumed in design

Material NameBOL EOL

Sourceε α α/ε ε α α/ε

Clear Alodined Aluminum 0.09 0.13 1.4 0.07 0.23 3.3 Testing, UCB Specified Process

Germanium Black Kapton 0.81 0.49 0.6 0.78 0.53 0.7 Heritage Testing

Electroless Nickle 0.07 0.39 5.6 STCH

DAG 213 0.74 0.92 1.20.52 0.65 1.3

Testing, EOL after 2.1e20 atoms/cm2 AO fluence

0.035 0.242 6.9Testing, EOL after 9.3e20 atoms/cm2 AO fluence

Ebanol C 0.1 0.97 9.7 0.08 0.93 11.6Testing, EOL after 9.3e20 atoms/cm2 AO fluence

Black Nickle 0.56 0.85 1.5 0.48 0.82 1.7Testing, EOL after 9.3e20 atoms/cm2 AO fluence

Z-93-C55 0.95 0.147 0.2 0.95 0.2 0.2 GSFC


Thermophysical Properties

• Values above from LM Case Sets• Thruster flux combination of ACS and TCM firings

MaterialThermal

Conductivity (W/mC)

Specific Heat (J/kgC)

Density (kg/m3)

Aluminum 6061 150 936 2770

Berrylium Copper 117 8250 420

M55J 35 1087 1930

PCB (3 oz Copper) 27, .25 600 1850


Thermal Limits

Operational (˚C) Non-Operational (˚C)

Qual / Proto

Flight Accept AFT AFT Flight

AcceptQual / Proto

Qual / Proto

Flight Accept AFT AFT Flight

AcceptQual / Proto

Component HOT HOT HOT COLD COLD COLD HOT HOT HOT COLD COLD COLDULPW1_PREAMP 80 75 70 -160 -165 -170 80 75 70 -160 -165 -170ULPW2_PREAMP 80 75 70 -160 -165 -170 80 75 70 -160 -165 -170

ULPW1_WHIP 110 105 100 -160 -165 -170 110 105 100 -160 -165 -170ULPW2_WHIP 110 105 100 -160 -165 -170 110 105 100 -160 -165 -170

ULPW1_STACER 110 105 100 -170 -175 -180 110 105 100 -170 -175 -180ULPW2_STACER 110 105 100 -170 -175 -180 110 105 100 -170 -175 -180

ULPW1_DEPLOYMENT_MECH 80 75 70 -160 -165 -170 80 75 70 -65 -70 -75ULPW2_DEPLOYMENT_MECH 80 75 70 -160 -165 -170 80 75 70 -65 -70 -75

USEP1_BOARD 10 5 0 -35 -40 -45 70 65 60 -60 -65 -70USEP2_BOARD 10 5 0 -35 -40 -45 70 65 60 -60 -65 -70

USTA_GRID 110 105 100 -100 -105 -110 110 105 100 -100 -105 -110USTA_HEMISPHERE 50 45 40 -25 -30 -35 60 55 50 -25 -30 -35USTA_TOF_BOARD 50 45 40 -25 -30 -35 60 55 50 -25 -30 -35

USTA_BOARD 50 45 40 -25 -30 -35 60 55 50 -25 -30 -35USWE_GRID 110 105 100 -100 -105 -110 110 105 100 -100 -105 -110

USWE_HEMISPHERE 50 45 40 -25 -30 -35 50 45 40 -25 -30 -35USWE_BASE 50 45 40 -25 -30 -35 50 45 40 -25 -30 -35

USWE_BOARD 50 45 40 -25 -30 -35 50 45 40 -25 -30 -35USWI_GRID 110 105 100 -100 -105 -110 110 105 100 -100 -105 -110

USWI_HEMISPHERE 50 45 40 -25 -30 -35 50 45 40 -25 -30 -35USWI_BOARD 50 45 40 -25 -30 -35 50 45 40 -25 -30 -35UDPU_BOARD 50 45 40 -25 -30 -35 60 55 50 -25 -30 -35

UDPU_BOX 50 45 40 -25 -30 -35 60 55 50 -25 -30 -35

New Limits Based on RBSP: AFT's not in current ERD:

New Limits:


SWIA Thermal Model

Germanium Black Kapton Blanket

Blanket,1.5 Sides Black Nickel

Black Nickel+ Grid (Not Shown)

Conduction to SC Isolated4 #8 Titanium with .25" G10 Isolator = .013 W/C each

Power Dissipation: 1.85 W +/- 15%

Mass: 2.5 kg


STATIC Thermal Model

Germanium Black Kapton Blanket

Blanket,1 Side Black Nickel

Black Nickel+ Grid (Not Shown)

Conduction to APP Isolated4 #8 Titanium with .25" G10 Isolator = .013 W/C each

Power Dissipation: 3.96 W +/- 15%

Mass: 2.9 kg


SWEA Thermal Model

Blanket

50 % Blanket50% Black Nickel

Black Nickel

Power Disipation: .89 W +/- 15%Mass: 1.8 kgSC Balance Mass: ~ 17 kg

Blanketed Balance Mass

Conduction to SC Isolated4 #8 Titanium with .25" G10 Isolator = .013 W/C each


SEP Thermal Model

Blanket

White Paint,Z-93-C55

White Paint,Z-93-C55

Conduction to SC Isolated4 #8 Titanium with .25" ULTEM 1000 Isolator = .011 W/C each

Power Disipation: .016 W +/- 15%

Mass: .63 kg


PFDPU Thermal Model

Boards to Frame Conduction:Epoxied to frame at lip = .386 W/C8 #4 Screws (screw path only)=.1 W/C total

Frame Conduction to Adapter Plate:22 #6 screws 0.42 = 9.24 W/C

Adapter Plate Conduction to SC:6 #10 bolts 1.32 each = 7.92 W/C

Power Disipation: 12.1 W +/- 15%

Mass: 5.9 kg

Black Nickel?

Simple Distributed Board Models


LPW Thermal Model

Stowed Stacer and DAD

PreAmp Power: .015 W +/- 15%

Whip

Mass: 2.6kg

Base Mech to Bracket Conductance: 6 #8 Ti with .25" G10 Isolator = .013 W/C each


LPW Thermal Model

Titanium NitrideClear Alodine(Inside Spacecraft Body Blanket)

DAG 213?


Spacecraft Thermal Model

Full Spacecraft Model

• Boundary Node Spacecraft• All Surface Temps from LM Output• MLI Unbound


Cruise Hot Predicts

Sheet: NodeInfo NodeInfo cruH0968o38 cruH0968o38 cruH0986o62 cruH0986o62 cruH101o5 cruH101o5

Parameter: Red High Red Low Min Max Min Max Min Max

Node/Group [°C] [°C] [°C] [°C] [°C] [°C]

ULPW1_PREAMP 70.0 -160.0 44.2 44.2 -10.7 -10.7 39.1 39.1 ULPW2_PREAMP 70.0 -160.0 5.9 5.9 -53.6 -53.6 36.0 36.0

ULPW1_WHIP 100.0 -160.0 59.9 59.9 49.0 49.0 61.5 61.5 ULPW2_WHIP 100.0 -160.0 29.4 29.4 3.5 3.5 56.9 56.9

ULPW1_STACER 100.0 -170.0 10.2 10.2 2.4 2.4 6.5 6.5 ULPW2_STACER 100.0 -170.0 4.7 4.7 -0.2 -0.2 6.4 6.4

ULPW1_DEPLOYMENT_MECH 70.0 -65.0 9.1 9.1 4.3 4.3 4.9 4.9 ULPW2_DEPLOYMENT_MECH 70.0 -65.0 4.7 4.7 4.0 4.0 4.9 4.9

USEP1_SHIELD 100.0 -100.0 -7.4 -7.4 -1.6 -1.6 -10.5 -10.5 USEP2_SHIELD 100.0 -100.0 -21.2 -21.2 -24.0 -24.0 -10.5 -10.5

USEP1_APERTURE_SUN 60.0 -75.0 3.1 3.1 4.7 4.7 -7.2 -7.2 USEP2_APERTURE_SUN 60.0 -75.0 -22.1 -22.1 -24.1 -24.1 -11.0 -11.0

USEP1_APERTURE_ANTI_SUN 60.0 -75.0 0.2 0.2 1.7 1.7 -8.2 -8.2 USEP2_APERTURE_ANTI_SUN 60.0 -75.0 -22.1 -22.1 -24.1 -24.1 -11.2 -11.2

USEP1_BOARD 60.0 -60.0 5.4 5.4 6.9 6.9 -3.4 -3.4 USEP2_BOARD 60.0 -60.0 -18.7 -18.7 -20.6 -20.6 -7.3 -7.3

USTA_GRID 100.0 -100.0 23.3 23.3 1.4 1.4 37.2 37.2 USTA_HEMISPHERE 50.0 -25.0 22.4 22.4 0.9 0.9 36.0 36.0 USTA_TOF_BOARD 50.0 -25.0 21.6 21.6 0.7 0.7 34.9 34.9

USTA_BOARD 50.0 -25.0 21.9 21.9 1.5 1.5 34.9 34.9 USWE_GRID 100.0 -100.0 39.4 39.4 36.1 36.1 43.9 43.9

USWE_HEMISPHERE 40.0 -25.0 21.3 21.3 18.4 18.4 31.6 31.6 USWE_BASE 40.0 -25.0 20.7 20.7 17.9 17.9 31.2 31.2

USWE_BOARD 40.0 -25.0 20.7 20.7 17.9 17.9 31.4 31.4 USWI_GRID 100.0 -100.0 17.5 17.5 -0.9 -0.9 28.2 28.2

USWI_HEMISPHERE 40.0 -25.0 17.4 17.4 -0.8 -0.8 28.1 28.1

USWI_BOARD 40.0 -25.0 17.1 17.1 -0.8 -0.8 27.6 27.6


Cruise Cold Predicts

Sheet: cruC145o45 cruC145o45 cruC118o9 cruC118o9 cruC108o45 cruC108o45 cruC108o25 cruC108o25Parameter: Min Max Min Max Min Max Min Max

Node/Group [°C] [°C] [°C] [°C] [°C] [°C] [°C] [°C] ULPW1_PREAMP -5.4 -5.4 -10.3 -10.3 -5.4 -5.4 -21.7 -21.7 ULPW2_PREAMP -44.5 -44.5 -12.5 -12.5 -43.3 -43.3 -7.2 -7.2

ULPW1_WHIP -4.5 -4.5 -4.0 -4.0 -5.4 -5.4 -117.0 -117.0 ULPW2_WHIP -32.8 -32.8 -7.5 -7.5 -33.9 -33.9 -1.4 -1.4

ULPW1_STACER 2.6 2.6 2.0 2.0 2.4 2.4 1.3 1.3 ULPW2_STACER -0.2 -0.2 1.8 1.8 -0.4 -0.4 2.3 2.3

ULPW1_DEPLOYMENT_MECH 4.1 4.1 4.0 4.0 4.0 4.0 4.0 4.0 ULPW2_DEPLOYMENT_MECH 3.9 3.9 4.0 4.0 3.8 3.8 4.0 4.0

USEP1_SHIELD -66.1 -66.1 -63.8 -63.8 -65.6 -65.6 -61.3 -61.3 USEP2_SHIELD -62.0 -62.0 -67.8 -67.8 -60.5 -60.5 -55.6 -55.6

USEP1_APERTURE_SUN -54.4 -54.4 -63.4 -63.4 -54.5 -54.5 -60.0 -60.0 USEP2_APERTURE_SUN -62.1 -62.1 -68.1 -68.1 -60.6 -60.6 -55.5 -55.5

USEP1_APERTURE_ANTI_SUN -55.7 -55.7 -64.2 -64.2 -55.9 -55.9 -60.3 -60.3 USEP2_APERTURE_ANTI_SUN -62.2 -62.2 -68.2 -68.2 -60.7 -60.7 -55.8 -55.8

USEP1_BOARD -50.5 -50.5 -63.5 -63.5 -55.0 -55.0 -55.2 -55.2 USEP2_BOARD -51.4 -51.4 -68.0 -68.0 -55.3 -55.3 -55.0 -55.0

USTA_GRID -30.5 -30.5 -29.0 -29.0 -30.8 -30.8 -29.1 -29.1 USTA_HEMISPHERE -30.8 -30.8 -29.5 -29.5 -31.1 -31.1 -29.6 -29.6 USTA_TOF_BOARD -30.8 -30.8 -30.0 -30.0 -31.1 -31.1 -30.1 -30.1

USTA_BOARD -30.7 -30.7 -30.3 -30.3 -30.9 -30.9 -30.4 -30.4 USWE_GRID -8.4 -8.4 -22.2 -22.2 -14.3 -14.3 -0.7 -0.7

USWE_HEMISPHERE -12.6 -12.6 -32.2 -32.2 -20.2 -20.2 0.5 0.5 USWE_BASE -12.7 -12.7 -32.5 -32.5 -20.3 -20.3 0.4 0.4

USWE_BOARD -12.8 -12.8 -32.6 -32.6 -20.4 -20.4 0.6 0.6 USWI_GRID -20.8 -20.8 -34.1 -34.1 -20.7 -20.7 -20.5 -20.5

USWI_HEMISPHERE -21.0 -21.0 -34.1 -34.1 -21.0 -21.0 -20.7 -20.7 USWI_BOARD -20.8 -20.8 -34.6 -34.6 -20.8 -20.8 -20.7 -20.7

Heater Controlled: ##Less than 5 C from AFT: ##

Ouside of AFT: ##


Mapping Hot Predicts

Sheet: NodeInfo mapHd70 mapHd30 mapHd760 mapHb-80 mapHbmidlow mapHb3

Parameter: Red High Red Low Min Max Min Max Min Max Min Max Min Max Min Max

Node/Group [°C] [°C] [°C] [°C] [°C] [°C] [°C] [°C] [°C] [°C] [°C] [°C] ULPW1_PREAMP 70.0 -160.0 -34.9 22.9 14.8 30.2 13.6 29.4 -7.0 10.4 -43.5 5.4 -76.5 33.9 ULPW2_PREAMP 70.0 -160.0 -33.4 24.7 12.8 27.0 14.0 30.3 14.8 29.1 -34.2 22.2 -75.6 36.8

ULPW1_WHIP 70.0 -160.0 -84.5 28.1 14.6 38.7 12.8 43.6 -11.3 14.6 -88.2 15.5 -124.1 47.3 ULPW2_WHIP 70.0 -160.0 -84.3 31.4 12.1 36.5 9.4 42.8 13.2 35.0 -82.3 38.2 -119.7 53.7

ULPW1_STACER 70.0 -170.0 -77.5 47.8 33.0 57.9 30.8 60.6 3.6 28.9 -82.9 31.1 -108.8 59.7 ULPW2_STACER 70.0 -170.0 -79.0 47.7 31.6 56.7 33.0 61.0 31.5 48.8 -74.2 53.4 -108.1 63.0

ULPW1_DEPLOYMENT_MECH 70.0 -160.0 13.6 17.8 14.5 18.1 13.7 17.3 7.8 13.8 5.7 14.5 4.2 7.3 ULPW2_DEPLOYMENT_MECH 70.0 -160.0 12.8 17.5 14.2 18.0 13.5 17.2 11.1 14.9 7.5 15.1 4.2 6.9

USEP1_APERTURE_SUN 0.0 -75.0 -33.5 -16.2 -24.4 -10.9 -26.3 -12.0 -32.9 -17.8 -40.0 -25.8 -45.1 -21.2 USEP2_APERTURE_SUN 0.0 -75.0 -34.9 -16.8 -26.2 -14.3 -24.9 -10.0 -22.7 -8.6 -34.5 -13.6 -46.3 -16.1

USEP1_APERTURE_ANTI_SUN 0.0 -75.0 -33.6 -16.6 -24.7 -10.5 -26.3 -12.2 -33.0 -18.7 -39.9 -25.8 -45.2 -21.6 USEP2_APERTURE_ANTI_SUN 0.0 -75.0 -34.9 -16.9 -26.3 -14.3 -24.9 -9.9 -23.1 -9.0 -34.6 -13.8 -46.3 -16.1

USEP1_BOARD 0.0 -35.0 -21.6 -3.8 -18.2 -2.1 -20.1 -3.9 -26.3 -13.4 -30.1 -13.8 -30.5 -20.7 USEP2_BOARD 0.0 -35.0 -22.6 -4.5 -20.3 -3.9 -19.0 -3.2 -17.5 -7.7 -22.0 -7.1 -30.6 -21.2 USEP1_SHIELD 100.0 -100.0 -50.3 -21.4 -30.6 -15.9 -34.2 -5.8 -39.5 -12.8 -50.9 -10.4 -62.3 -5.9 USEP2_SHIELD 100.0 -100.0 -36.0 -17.1 -26.5 -13.7 -25.2 -10.3 -23.3 -8.7 -35.3 -14.4 -47.3 -16.4

USTA_GRID 100.0 -100.0 12.7 20.0 17.1 20.6 19.3 22.5 7.8 12.3 4.2 14.0 -7.3 7.6 USTA_HEMISPHERE 40.0 -25.0 12.9 20.0 17.0 20.6 19.2 22.5 7.8 12.2 4.4 14.0 -7.2 7.5 USTA_TOF_BOARD 40.0 -25.0 14.5 20.5 17.5 21.1 19.7 23.2 8.4 12.8 5.2 14.5 -6.5 7.8

USTA_BOARD 40.0 -25.0 15.4 21.5 18.3 22.0 20.7 24.2 9.4 13.7 6.5 15.4 -5.5 8.9 USWE_GRID -32.7 -13.0 -32.1 -10.2 -32.3 -10.5 -8.8 0.8 -18.0 -3.6 -31.5 -17.7

USWE_HEMISPHERE 40.0 -25.0 -21.4 -1.4 -21.4 -0.4 -21.4 -2.6 0.0 8.7 -7.1 6.1 -21.3 -5.5 USWE_BASE 40.0 -25.0 -20.8 -0.6 -20.8 0.3 -20.8 -1.9 0.8 9.2 -6.6 6.7 -20.7 -4.7

USWE_BOARD 40.0 -25.0 -20.6 -0.3 -20.5 0.6 -20.5 -1.6 1.1 9.6 -6.4 7.1 -20.5 -4.4 USWI_GRID 100.0 -100.0 0.6 14.9 6.1 14.6 7.0 15.1 -5.1 4.6 -7.6 6.3 -15.9 -2.7

USWI_HEMISPHERE 40.0 -25.0 0.0 14.7 5.8 14.4 6.7 15.0 -5.3 4.3 -7.9 6.0 -16.2 -2.9 USWI_BOARD 40.0 -25.0 2.1 15.1 6.2 14.8 7.1 15.1 -4.9 5.2 -7.0 6.9 -15.4 -2.6 UDPU_BOARD 40.0 -25.0 19.6 20.0 19.8 19.9 19.7 19.9 19.7 19.7 19.7 19.9 19.7 20.2

UDPU_BOX 40.0 -25.0 19.2 19.6 19.3 19.4 19.2 19.4 19.2 19.2 19.2 19.4 19.3 19.7


Mapping Cold Predicts

Sheet: NodeInfo mapCd204 mapCd415 mapCb-80 mapCbmidlow mapCb3Parameter: Red High Red Low Min Max Min Max Min Max Min Max Min Max

Node/Group [°C] [°C] [°C] [°C] [°C] [°C] [°C] [°C] [°C] [°C] ULPW1_PREAMP 70.0 -160.0 -90.0 -23.4 -22.3 -19.6 -40.5 -36.1 -69.8 -31.9 -96.2 -24.5 ULPW2_PREAMP 70.0 -160.0 -90.4 -24.7 -23.1 -20.4 -19.9 -18.5 -60.5 -18.2 -95.2 -20.4

ULPW1_WHIP 70.0 -160.0 -138.6 -12.0 -18.3 -12.1 -44.5 -30.7 -108.6 -25.3 -137.8 -15.6 ULPW2_WHIP 70.0 -160.0 -138.8 -14.8 -23.1 -16.3 -23.1 -15.9 -103.0 -16.0 -136.7 -9.0

ULPW1_STACER 70.0 -170.0 -148.0 -4.8 -13.4 -7.0 -38.0 -20.1 -114.4 -15.2 -145.7 -7.8 ULPW2_STACER 70.0 -170.0 -148.1 -5.4 -13.0 -6.8 -10.8 -6.1 -110.1 -4.7 -145.2 -2.4

ULPW1_DEPLOYMENT_MECH 70.0 -160.0 4.1 6.6 4.4 7.1 4.3 5.8 4.2 5.8 4.1 4.3 ULPW2_DEPLOYMENT_MECH 70.0 -160.0 4.1 6.1 4.4 6.5 4.3 5.3 4.2 5.3 4.0 4.3

USEP1_APERTURE_SUN 0.0 -75.0 -61.8 -47.9 -52.2 -42.1 -54.6 -51.7 -60.0 -51.6 -63.9 -54.6 USEP2_APERTURE_SUN 0.0 -75.0 -63.4 -48.7 -52.0 -42.4 -52.5 -48.3 -60.7 -48.1 -65.4 -52.7

USEP1_APERTURE_ANTI_SUN 0.0 -75.0 -62.0 -48.1 -52.5 -42.5 -55.0 -52.0 -60.3 -52.0 -64.2 -55.1 USEP2_APERTURE_ANTI_SUN 0.0 -75.0 -63.5 -48.8 -52.1 -42.5 -52.6 -48.7 -60.8 -48.4 -65.5 -52.9

USEP1_BOARD 0.0 -35.0 -31.4 -25.7 -30.9 -24.2 -31.1 -30.8 -31.3 -30.8 -31.5 -31.1 USEP2_BOARD 0.0 -35.0 -31.5 -26.1 -30.9 -24.6 -30.9 -30.3 -31.3 -30.2 -31.6 -31.0 USEP1_SHIELD 100.0 -100.0 -84.9 -59.2 -62.6 -54.2 -63.8 -60.8 -81.7 -61.0 -86.6 -61.0 USEP2_SHIELD 100.0 -100.0 -64.5 -48.9 -52.2 -42.8 -52.8 -49.0 -61.6 -48.7 -66.4 -53.1

USTA_GRID 100.0 -100.0 -19.1 0.6 -10.8 2.7 -19.9 -2.6 -20.9 -1.2 -23.0 -9.3 USTA_TOF_BOARD 40.0 -25.0 -18.7 1.9 -10.4 3.4 -19.5 -1.8 -20.4 -0.4 -21.9 -8.7

USTA_BOARD 40.0 -25.0 -18.0 2.8 -9.7 4.1 -18.8 -1.0 -19.6 0.4 -20.7 -8.1 USWE_HEMISPHERE 40.0 -25.0 -21.7 -10.3 -21.7 -10.4 -21.3 -2.3 -21.5 -4.1 -21.7 -11.8

USWE_BASE 40.0 -25.0 -21.2 -9.5 -21.2 -9.6 -20.8 -1.8 -21.0 -3.5 -21.2 -11.1 USWE_BOARD 40.0 -25.0 -21.0 -9.2 -21.0 -9.3 -20.5 -1.4 -20.8 -3.1 -21.0 -10.8

USWI_GRID 100.0 -100.0 -22.8 -8.5 -20.9 -4.9 -21.5 -12.5 -22.6 -11.2 -22.8 -17.9 USWI_HEMISPHERE 40.0 -25.0 -22.8 -8.5 -20.8 -4.8 -21.5 -12.5 -22.7 -11.2 -22.8 -17.8

USWI_BOARD 40.0 -25.0 -20.9 -7.1 -20.1 -4.3 -20.4 -11.6 -20.8 -10.3 -20.9 -17.2 UDPU_BOARD 40.0 -25.0 19.5 19.6 19.6 19.7 19.6 19.6 19.6 19.6 19.6 19.6

UDPU_BOX 40.0 -25.0 19.3 19.4 19.4 19.4 19.4 19.4 19.4 19.4 19.4 19.4

Heater Controlled: ##Less than 5 C from AFT: ##

Ouside of AFT: ##


Cruise Heater Power

Cruise Heater Power

Heater ID

cruH0968o38 cruH0986o62 cruH101o5 cruC108o25. cruC108o45 cruC118o9 cruC145o45 MAX

Steady State Average (W)







Steady State

Average (W)

Heater Size 75% Duty

Cycle

Heater Size 50% Duty

Cycle

UCB_DPU_SURV 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

UCB_SEP1_SURV 0.0 0.0 0.0 0.5 0.0 0.8 0.5 0.8 1.0 2.0

UCB_SEP1_OP 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

UCB_SEP2_SURV 0.0 0.0 0.0 0.1 0.5 0.8 0.9 0.9 1.2 2.4

UCB_SEP2_OP 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

UCB_STA_SURV 0.0 0.0 0.0 2.0 3.7 1.6 2.7 3.7 5.0 9.9

UCB_STA_OP 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

UCB_SWE_SURV 0.0 0.0 0.0 0.0 1.7 1.4 2.5 2.5 3.3 6.6

UCB_SWE_OP 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

UCB_SWI_SURV 0.0 0.0 0.0 3.0 3.3 2.0 3.5 3.5 4.6 9.2

UCB_SWI_OP 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total PF Instrument Heater

Power0.0 0.0 0.0 5.6 9.3 6.6 10.0 10.0 13.4 26.8


Mapping Hot Heater Power

Mapping Hot Case Heater Power

Heater ID

mapHd30 mapHd760 mapHd70 mapHb-80 mapHbmidlow mapHb3 MAX

Orbit Ave (W)

Peak (W)

Orbit Ave (W)

Peak (W)

Orbit Ave (W)

Peak (W)

Orbit Ave (W)

Peak (W)

Orbit Ave (W)

Peak (W)

Orbit Ave (W)

Peak (W)

Orbit Ave (W)

Peak (W)

Heater Size 75% Duty Cycle


UCB_DPU_SURV 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

UCB_SEP1_SURV 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

UCB_SEP1_OP 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.3 0.2 1.0 0.2 1.0 1.4 2.1

UCB_SEP2_SURV 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

UCB_SEP2_OP 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 1.2 0.2 1.2 1.5 2.3

UCB_STA_SURV 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

UCB_STA_OP 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

UCB_SWE_SURV 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

UCB_SWE_OP 0.4 3.0 0.8 3.1 0.6 3.2 0.0 0.0 0.0 0.0 0.4 2.8 0.8 3.2 4.3 6.4

UCB_SWI_SURV 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

UCB_SWI_OP 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total PF Instrument Heater

Power0.4 3.0 0.8 3.1 0.6 3.2 0.0 0.0 0.0 0.3 0.8 5.1 0.8 5.1 6.7 10.1


Mapping Cold Heater Power

Mapping Cold Case Heater Power

Heater ID

mapCd204 mapCd415 mapCb-80 mapCbmidlow mapCb3 MAX

Orbit Ave (W)

Peak (W)

Orbit Ave (W)

Peak (W)

Orbit Ave (W)

Peak (W)

Orbit Ave (W)

Peak (W)

Orbit Ave (W)

Peak (W)

Orbit Ave (W)

Peak (W)



UCB_DPU_SURV 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

UCB_SEP1_SURV 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

UCB_SEP1_OP 2.0 2.8 1.5 1.9 2.0 2.1 2.1 2.6 2.4 3.0 2.4 3.0 4.0 6.0

UCB_SEP2_SURV 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

UCB_SEP2_OP 2.0 2.9 1.5 1.8 1.7 1.9 1.9 2.7 2.4 3.1 2.4 3.1 4.1 6.2

UCB_STA_SURV 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

UCB_STA_OP 0.0 0.0 0.0 0.0 0.0 0.0 0.1 1.1 0.8 5.6 0.8 5.6 7.4 11.1

UCB_SWE_SURV 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

UCB_SWE_OP 3.3 4.9 3.3 4.9 0.1 3.1 1.0 4.1 3.2 4.8 3.3 4.9 6.5 9.7

UCB_SWI_SURV 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

UCB_SWI_OP 2.5 7.5 0.4 2.2 2.8 3.9 2.8 7.2 3.7 7.6 3.7 7.6 10.2 15.2

Total PF Instrument Heater Power 9.8 18.1 6.6 10.7 6.7 11.1 8.0 17.7 12.6 24.1 12.6 24.1 32.1 48.2


Lockheed Thermal Memos #1

Ref: ERD Dec 2, 2010 , Rev G Launch Summary Cruise/MOI Summary Science Summary

Temperature Limits (°C ) Temperature Node# Temperature Node # Temperature Node#

AFT (Op) FA (Op) PF (Op)AFT (Non-

Op)PF (Non-

Op) (°C) (°C) (°C)

Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min MaxPFDPU -20 40 -25 45 -30 50 -20 50 -30 60 20 20 100 100 3 40 100 100 5 23 100 100




Op)PF (Non-

Op) (°C) (°C) (°C)

Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min MaxSTATIC -15 35 -20 45 -30 50 -30 50 -40 60 20 20 10/11 10/11 -53 20 11 10 -102 12 11 10




Op)PF (Non-

Op) (°C) (°C) (°C)

Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min MaxSEP -30 0 -35 5 -40 10 -55 60 -65 70 20 20 5/105 5/105 -13 43 105 5 -21 18 105 105

• STATIC Modeling problem fixed, now looks ok• SEP modeling issue found, LM Notified and producing

new predicts


Lockheed Thermal Memos #2




Op)PF (Non-

Op) (°C) (°C) (°C)

Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min MaxSWEA -20 40 -25 45 -30 50 -20 40 -30 50 20 20 15 15 -17 24 15 15 -17 3 15 15




Op)PF (Non-

Op) (°C) (°C) (°C)

Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min MaxSWIA -20 40 -25 45 -30 50 -20 40 -30 50 20 21 10 10 -18 -10 10 10 -18 -5 10 10

• No Issues, but not yet correlated with UCB run


Lockheed Thermal Memos




Op)PF (Non-

Op) (°C) (°C) (°C)

Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min MaxSWEA -20 40 -25 45 -30 50 -20 40 -30 50 20 20 15 15 -17 24 15 15 -17 3 15 15




Op)PF (Non-

Op) (°C) (°C) (°C)

Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min Max Min MaxSWIA -20 40 -25 45 -30 50 -20 40 -30 50 20 21 10 10 -18 -10 10 10 -18 -5 10 10

• No Issues, but not yet correlated with UCB run


RBSP LVPS Thermal Issue

• PWM chip on RBSP LVPS was running 60 C above the box temp and was running at 90 C before thermal vac test was aborted

• Investigation revealed several issues– Board mounting standoffs were G10 instead of Aluminum– EMI shield was Alodined Aluminum shutting off radiation– More importantly ground / thermal planes did not connect to the mounting areas


RBSP Resolution

• RBSP issue solved – Removed resistors dissapating1 watt from board, will mount to

side of box– Turned radiation back on with black paint

• Built a detailed thermal model of board and correlated its performance with testing– 12 layer FR4 board

• 12 layers of FR4 in Model .093” / 12 = 0.00775” thick• Conductors between FR4 layers

– Board contains 7, 3-oz Ground Planes• All ground planes are partial though they cover most of the board• 7 Separate ground planes in model 0.0042” thick • Conductors from each ground layer to the FR4 layer above and the

layer below– Individual components dissipating more than .1 W modeled


PFDPU Way Forward

• Create detailed thermal model of high dissipation boards• Current simple distributed property model is a good start• Thermal / Ground planes need to grow as much as possible and

overlap as much as possible.• Thermal planes need to be brought to the edge of the board

– Maintain electrical isolation while improving thermal connections much as possible

Sheet: Nominal_50C Peak_50CTime Step: SS SS

Node/Group Power [W] Temp [°C] Power [W] Temp [°C]

Max_BEB 0.6 56.1 1.5 63.2Max_DFB 1.6 59.4 4.0 69.8

Max_MAG2 1.1 59.3 1.5 66.6Max_MAG1 1.1 59.0 1.5 65.6Max_DAP2 0.7 58.4 1.6 65.9Max_DAP1 0.7 59.0 1.6 67.4

Max_IIB 2.8 61.5 5.0 71.1Max_DCB2 0.0 56.0 0.0 61.8Max_REG2 0.0 55.2 0.0 61.0Max_DCB1 1.2 58.0 3.2 67.8Max_REG1 2.3 59.2 4.7 68.9

Total: 12.1 24.5


LPW Stacer

• LPW Stacer needs to be black to help reject deep dip heat load• Black Nickel was identified as a candidate and sent out for AO

testing and it did well• However when it was applied to a stacer it modified its mechanical

behavior• DAG 213 was identified as an alternative

– We have lots of experience with it and has been used on stacers before

• Unfortunately DAG 213 was completely eroded after AO testing

MAVEN Atomic Oxygen testing Data

Emittance Solar a/e

Sample 200K 300K 400K Absorptance 200K 300K 400K

DAG 213 Before AO 0.722 0.744 0.762 0.921 1.28 1.24 1.21

DAG 213 After 2.1E+20 atoms/cm2 AO fluence 0.493 0.528 0.554 0.651 1.32 1.23 1.18

DAG 213 After 9.3E+20 atoms/cm2 AO fluence 0.041 0.035 0.028 0.242 5.90 6.91 8.64


Backup Slides

Back Up Slides


Requirements Documents

• Performance Requirements Document– MAVEN-program-plan-appendix-v28_L1Req.doc (Level 1)– MAVEN-PM-RQMT-0005, Mission Requirements (Level 2)– MAVEN-PFIS-RQMT-0016, PFP Requirements (Level 3)– MAVEN-PF-STATIC-001A-Requirements_&_Specifications.xls (Level 4)

• Mission Assurance Requirements– MAVEN-PM-RQMT-0006, Mission Assurance Requirements– MAVEN_PF_QA_002, PFP Mission Assurance Implementation Plan

• Mission Operations– MAVEN-MOPS-RQMT-0027, Mission Operations Requirements

• Environmental Requirements Document– MAVEN-SYS-RQMT-0010

• Spacecraft to PFP ICD– MAVEN-SC-ICD-0007


LM Launch/Initial Acquisition Case Definitions

Case ID/Analysis Case Case Description1001_Launch_Prelaunch_Hot Prelaunch Hot, Steady-State 1002_Launch_Prelaunch_Cold Prelaunch Cold, Steady-State1003_Launch_Boost_Hot Launch Hot, Liftoff to Payload Fairing Jettison1013_Launch_Boost_Cold Launch Cold, Liftoff to Payload Fairing Jettison1004A_Launch_Centaur_Open_Hot Launch Hot, PLF to S/C Separation, Open

1014A_Launch_Centaur_Open_Cold Launch Cold, S/C Sep to SA Deployment , Open1005A_Launch_Centaur_Mid_Hot Launch Hot, PLF to S/C Separation, Mid1015A_Launch_Centaur_Mid_Cold Launch Cold, PLF to S/C Separation ,Mid1006A_Launch_Centaur_Close_Hot Launch Hot, PLF to S/C Separation, Close

1016A_Launch_Centaur_Close_Cold Launch Cold, PLF to S/C Separation, Close1004B_Launch_Sep_Initial Config_SA_Stowed_Open_Hot

Launch Hot, S/C Sep to SA Deployment, Open1014B_Launch_Sep_Initial Config_SA_Stowed_Mid_Hot

Launch Cold, S/C Sep to SA Deployment, Open1005B_Launch_Sep_Initial Config_SA_Stowed_Mid_Hot

Launch Hot, S/C Sep to SA Deployment, Mid1015B_Launch_Sep_Initial Config_SA_Stowed_Mid_Cold Launch Cold, S/C Sep to SA Deployment, Mid

1006B_Launch_Sep_Initial Config_SA_Stowed_Close_Hot Launch Hot, S/C Sep to SA Deployment, Close1016B_Launch_Sep_Initial Config_SA_Stowed_Close_Cold Launch Cold, S/C Sep to SA Deployment ,Close1004C_Launch_Sep_Initial Config_SA_Deployed_Open_Hot Launch Hot, SA Deployed, Open1014C_Launch_Sep_Initial Config_SA_Deployed_Open_Cold Launch Cold, SA Deployed, Open1005C_Launch_Sep_Initial Config_SA_Deployed_Mid_Hot Launch Hot, SA Deployed, Mid1015C_Launch_Sep_Initial Config_SA_Deployed_Mid_Cold Launch Cold, SA Deployed, Mid1006C_Launch_Sep_Initial Config_SA_Deployed_Close_Hot Launch Hot, SA Deployed Close1016C_Launch_Sep_Initial Config_SA_Deployed_Close_Cold Launch Cold, SA Deployed Close


LM Cruise Case Definitions

Case ID/Analysis CaseCase Description

Solar Distance

(AU)Solar Intensity

(W/m2)2001_Hot_Early Cruise_096AU_60SOP Hot Early Cruise at 0.96 Solar Range, 60° Solar Offpoint 0.96 14812002_Hot_Early Cruise_096AU_45SOP Hot Early Cruise at 0.96 Solar Range, 45° Solar Offpoint 0.96 14812003_Hot_Middle Cruise_113AU_9SOP Hot Middle Cruise at 1.13 Solar Range, 9° Solar Offpoint 1.13 10872011_Cold_Middle Cruise_123AU_9SOP Cold Middle Cruise at 1.23 Solar Range, 9° Solar Offpoint 1.23 9172012_Cold_Late Cruise_144AU_9SOP Cold Late Cruise at 1.44 Solar Range, 9° Solar Offpoint 1.44 6692013_Cold_Late Cruise_144AU_45SOP Cold Late Cruise at 1.44 Solar Range, 45° Solar Offpoint 1.44 6692014_Cold_Early Cruise_099AU_60SOP Cold Early Cruise at 0.99 Solar Range, 60° Solar Offpoint 0.99 1416


LM MOI Case Definitions


Solar Distance

(AU)

Solar Intensity per TSS(W/m2)

3001_MOI_Hot_Open MOI Hot, Open 1.426 7103002_MOI_Hot_Mid MOI Hot, Mid 1.422 710

3003_MOI_Hot_Close MOI Hot, Close 1.420 710

3004_MOI_Cold_Open MOI Cold, Open

1.426 490

3005_MOI_Cold_Mid MOI Cold, Mid

1.422 490

3006_MOI_Cold_Close MOI Cold, Close 1.420 490


LM Science Case Definitions


Solar Distance

(AU)

Solar Intensity(W/m2)

5001_Cold_Science_Earth Comm Cold Science, Earth Comm Orbit with Max Eclipse of 75 min. 1.68 4905002_Cold_Science_Scenario 1 Cold Science, Scenario 1 Orbit with Max Eclipse 1.68 4905003_Cold_Science_Scenario_2 Cold Science, Scenario 1a Orbit with Max Eclipse 1.68 4905010_Hot_Science_Earth Comm Hot Science, Earth Comm Orbit with No Eclipse 1.40 7105011_Hot_Science_Scenario_1 Hot Science, Scenario 1 Orbit with No Eclipse 1.40 7105012_Hot_Science_Scenario_2 Hot Science, Scenario 1a Orbit with No Eclipse 1.40 710


Solar Distance

(AU)

Solar Intensity(W/m2)

6001_Hot_Science_Deep_Dip_+Z_FMH Hot Science, Deep Dip with Aeroheating FMH Applied in +Z Direction 1.40 7106002_Hot_Science_Deep_Dip_-Z_FMH Hot Science, Deep Dip with Aeroheating FMH Applied in -Z Direction 1.40 7106003_Hot_Science_Deep_Dip_+Y_FMH Hot Science, Deep Dip with Aeroheating FMH Applied in +Y Direction 1.40 7106004_Hot_Science_Deep_Dip_-Y_FMH Hot Science, Deep Dip with Aeroheating FMH Applied in -Y Direction 1.40 7106005_Hot_Science_Deep_Dip_+X_FMH Hot Science, Deep Dip with Aeroheating FMH Applied in +X Direction 1.40 7106006_Hot_Science_Deep_Dip_-X_FMH Hot Science, Deep Dip with Aeroheating FMH Applied in -X Direction 1.40 710

Science Cases

Deep Dip Cases