1. 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) Mission

2. 7-2 MAVEN 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

3. 7-3 MAVEN Peer Review May 08-10, 2011 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

4. 7-4 MAVEN Peer Review May 08-10, 2011 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

5. 7-5 MAVEN Peer Review May 08-10, 2011 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

6. 7-6 MAVEN Peer Review May 08-10, 2011 Environmental Loads Values above from LM Case Sets Thruster flux combination of ACS and TCM firings Phase Solar Flux (W/m 2 )AlbedoIR (K)Aero MinMaxMinMaxMinMax Flux (W/m 2 ) Time (min) Launch131913870.290.3222126211351 Cruise6491480 0273 MOI6586640.18 148 Mars4907100.140.35204218 Deep Dip710 0.35 218 100010 Instrument Thruster Plume Flux (W/m 2 )Time (min) SWIA3010 SEP3010 LPW Stacer30010 LPW PreAmp3010 LPW Whip30010 SWEA30010

7. 7-7 MAVEN Peer Review May 08-10, 2011 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 Name BOLEOL Source εαα/εεα Clear Alodined Aluminum0.090.131.40.070.233.3Testing, UCB Specified Process Germanium Black Kapton0.810.490.60.780.530.7Heritage Testing Electroless Nickle0.070.395.6 STCH DAG 2130.740.921.2 0.520.651.3 Testing, EOL after 2.1e20 atoms/cm 2 AO fluence 0.0350.2426.9 Testing, EOL after 9.3e20 atoms/cm 2 AO fluence Ebanol C0.10.979.70.080.9311.6 Testing, EOL after 9.3e20 atoms/cm 2 AO fluence Black Nickle0.560.851.50.480.821.7 Testing, EOL after 9.3e20 atoms/cm 2 AO fluence Z-93-C550.950.1470.20.950.2 GSFC

8. 7-8 MAVEN Peer Review May 08-10, 2011 Thermophysical Properties Values above from LM Case Sets Thruster flux combination of ACS and TCM firings Material Thermal Conductivity (W/mC) Specific Heat (J/kgC) Density (kg/m 3 ) Aluminum 60611509362770 Berrylium Copper1178250420 M55J3510871930 PCB (3 oz Copper)27,.256001850

9. 7-9 MAVEN Peer Review May 08-10, 2011 Thermal Limits Operational ( ˚ C) Non-Operational (˚C) Qual / Proto Flight Accept AFT Flight Accept Qual / Proto Flight Accept AFT Flight Accept Qual / Proto ComponentHOT COLD HOT COLD ULPW1_PREAMP807570-160-165-170807570-160-165-170 ULPW2_PREAMP807570-160-165-170807570-160-165-170 ULPW1_WHIP110105100-160-165-170110105100-160-165-170 ULPW2_WHIP110105100-160-165-170110105100-160-165-170 ULPW1_STACER110105100-170-175-180110105100-170-175-180 ULPW2_STACER110105100-170-175-180110105100-170-175-180 ULPW1_DEPLOYMENT_MECH807570-160-165-170807570-65-70-75 ULPW2_DEPLOYMENT_MECH807570-160-165-170807570-65-70-75 USEP1_BOARD1050-35-40-45706560-60-65-70 USEP2_BOARD1050-35-40-45706560-60-65-70 USTA_GRID110105100-100-105-110110105100-100-105-110 USTA_HEMISPHERE504540-25-30-35605550-25-30-35 USTA_TOF_BOARD504540-25-30-35605550-25-30-35 USTA_BOARD504540-25-30-35605550-25-30-35 USWE_GRID110105100-100-105-110110105100-100-105-110 USWE_HEMISPHERE504540-25-30-35504540-25-30-35 USWE_BASE504540-25-30-35504540-25-30-35 USWE_BOARD504540-25-30-35504540-25-30-35 USWI_GRID110105100-100-105-110110105100-100-105-110 USWI_HEMISPHERE504540-25-30-35504540-25-30-35 USWI_BOARD504540-25-30-35504540-25-30-35 UDPU_BOARD504540-25-30-35605550-25-30-35 UDPU_BOX504540-25-30-35605550-25-30-35 New Limits Based on RBSP: AFT's not in current ERD: New Limits:

10. 7-10 MAVEN Peer Review May 08-10, 2011 SWIA Thermal Model Germanium Black Kapton Blanket Blanket, 1.5 Sides Black Nickel Black Nickel + Grid (Not Shown) Conduction to SC Isolated 4 #8 Titanium with.25" G10 Isolator =.013 W/C each Power Dissipation: 1.85 W +/- 15% Mass: 2.5 kg

11. 7-11 MAVEN Peer Review May 08-10, 2011 STATIC Thermal Model Germanium Black Kapton Blanket Blanket, 1 Side Black Nickel Black Nickel + Grid (Not Shown) Conduction to APP Isolated 4 #8 Titanium with.25" G10 Isolator =.013 W/C each Power Dissipation: 3.96 W +/- 15% Mass: 2.9 kg

12. 7-12 MAVEN Peer Review May 08-10, 2011 SWEA Thermal Model Blanket 50 % Blanket 50% Black Nickel Black Nickel Power Disipation:.89 W +/- 15% Mass: 1.8 kg SC Balance Mass: ~ 17 kg Blanketed Balance Mass Conduction to SC Isolated 4 #8 Titanium with.25" G10 Isolator =.013 W/C each

13. 7-13 MAVEN Peer Review May 08-10, 2011 SEP Thermal Model Blanket White Paint, Z-93-C55 White Paint, Z-93-C55 Conduction to SC Isolated 4 #8 Titanium with.25" ULTEM 1000 Isolator =.011 W/C each Power Disipation:.016 W +/- 15% Mass:.63 kg

14. 7-14 MAVEN Peer Review May 08-10, 2011 PFDPU Thermal Model Boards to Frame Conduction: Epoxied to frame at lip =.386 W/C 8 #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

15. 7-15 MAVEN Peer Review May 08-10, 2011 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

16. 7-16 MAVEN Peer Review May 08-10, 2011 LPW Thermal Model Titanium Nitride Clear Alodine (Inside Spacecraft Body Blanket) DAG 213?

17. 7-17 MAVEN Peer Review May 08-10, 2011 Spacecraft Thermal Model Full Spacecraft Model Boundary Node Spacecraft All Surface Temps from LM Output MLI Unbound

18. 7-18 MAVEN Peer Review May 08-10, 2011 Cruise Hot Predicts Sheet:NodeInfo cruH0968o38 cruH0986o62 cruH101o5 Parameter:Red HighRed Low Min Max Min Max Min Max Node/Group [°C] ULPW1_PREAMP70.0-160.044.2 -10.7 39.1 ULPW2_PREAMP70.0-160.05.9 -53.6 36.0 ULPW1_WHIP100.0-160.059.9 49.0 61.5 ULPW2_WHIP100.0-160.029.4 3.5 56.9 ULPW1_STACER100.0-170.010.2 2.4 6.5 ULPW2_STACER100.0-170.04.7 -0.2 6.4 ULPW1_DEPLOYMENT_MECH70.0-65.09.1 4.3 4.9 ULPW2_DEPLOYMENT_MECH70.0-65.04.7 4.0 4.9 USEP1_SHIELD100.0-100.0-7.4 -1.6 -10.5 USEP2_SHIELD100.0-100.0-21.2 -24.0 -10.5 USEP1_APERTURE_SUN60.0-75.03.1 4.7 -7.2 USEP2_APERTURE_SUN60.0-75.0-22.1 -24.1 -11.0 USEP1_APERTURE_ANTI_SUN60.0-75.00.2 1.7 -8.2 USEP2_APERTURE_ANTI_SUN60.0-75.0-22.1 -24.1 -11.2 USEP1_BOARD60.0-60.05.4 6.9 -3.4 USEP2_BOARD60.0-60.0-18.7 -20.6 -7.3 USTA_GRID100.0-100.023.3 1.4 37.2 USTA_HEMISPHERE50.0-25.022.4 0.9 36.0 USTA_TOF_BOARD50.0-25.021.6 0.7 34.9 USTA_BOARD50.0-25.021.9 1.5 34.9 USWE_GRID100.0-100.039.4 36.1 43.9 USWE_HEMISPHERE40.0-25.021.3 18.4 31.6 USWE_BASE40.0-25.020.7 17.9 31.2 USWE_BOARD40.0-25.020.7 17.9 31.4 USWI_GRID100.0-100.017.5 -0.9 28.2 USWI_HEMISPHERE40.0-25.017.4 -0.8 28.1 USWI_BOARD40.0-25.017.1 -0.8 27.6

19. 7-19 MAVEN Peer Review May 08-10, 2011 Cruise Cold Predicts Sheet:cruC145o45 cruC118o9 cruC108o45 cruC108o25 Parameter: Min Max Min Max Min Max Min Max Node/Group[°C] ULPW1_PREAMP-5.4 -10.3 -5.4 -21.7 ULPW2_PREAMP-44.5 -12.5 -43.3 -7.2 ULPW1_WHIP-4.5 -4.0 -5.4 -117.0 ULPW2_WHIP-32.8 -7.5 -33.9 -1.4 ULPW1_STACER2.6 2.0 2.4 1.3 ULPW2_STACER-0.2 1.8 -0.4 2.3 ULPW1_DEPLOYMENT_MECH4.1 4.0 ULPW2_DEPLOYMENT_MECH3.9 4.0 3.8 4.0 USEP1_SHIELD-66.1 -63.8 -65.6 -61.3 USEP2_SHIELD-62.0 -67.8 -60.5 -55.6 USEP1_APERTURE_SUN-54.4 -63.4 -54.5 -60.0 USEP2_APERTURE_SUN-62.1 -68.1 -60.6 -55.5 USEP1_APERTURE_ANTI_SUN-55.7 -64.2 -55.9 -60.3 USEP2_APERTURE_ANTI_SUN-62.2 -68.2 -60.7 -55.8 USEP1_BOARD-50.5 -63.5 -55.0 -55.2 USEP2_BOARD-51.4 -68.0 -55.3 -55.0 USTA_GRID-30.5 -29.0 -30.8 -29.1 USTA_HEMISPHERE-30.8 -29.5 -31.1 -29.6 USTA_TOF_BOARD-30.8 -30.0 -31.1 -30.1 USTA_BOARD-30.7 -30.3 -30.9 -30.4 USWE_GRID-8.4 -22.2 -14.3 -0.7 USWE_HEMISPHERE-12.6 -32.2 -20.2 0.5 USWE_BASE-12.7 -32.5 -20.3 0.4 USWE_BOARD-12.8 -32.6 -20.4 0.6 USWI_GRID-20.8 -34.1 -20.7 -20.5 USWI_HEMISPHERE-21.0 -34.1 -21.0 -20.7 USWI_BOARD-20.8 -34.6 -20.8 -20.7 Heater Controlled:## Less than 5 C from AFT:## Ouside of AFT:##

20. 7-20 MAVEN Peer Review May 08-10, 2011 Mapping Hot Predicts Sheet:NodeInfomapHd70mapHd30mapHd760mapHb-80mapHbmidlowmapHb3 Parameter:Red HighRed LowMinMaxMinMaxMinMaxMinMaxMinMaxMinMax Node/Group [°C] ULPW1_PREAMP70.0-160.0-34.922.914.830.213.629.4-7.010.4-43.55.4-76.533.9 ULPW2_PREAMP70.0-160.0-33.424.712.827.014.030.314.829.1-34.222.2-75.636.8 ULPW1_WHIP70.0-160.0-84.528.114.638.712.843.6-11.314.6-88.215.5-124.147.3 ULPW2_WHIP70.0-160.0-84.331.412.136.59.442.813.235.0-82.338.2-119.753.7 ULPW1_STACER70.0-170.0-77.547.833.057.930.860.63.628.9-82.931.1-108.859.7 ULPW2_STACER70.0-170.0-79.047.731.656.733.061.031.548.8-74.253.4-108.163.0 ULPW1_DEPLOYMENT_MECH70.0-160.013.617.814.518.113.717.37.813.85.714.54.27.3 ULPW2_DEPLOYMENT_MECH70.0-160.012.817.514.218.013.517.211.114.97.515.14.26.9 USEP1_APERTURE_SUN0.0-75.0-33.5-16.2-24.4-10.9-26.3-12.0-32.9-17.8-40.0-25.8-45.1-21.2 USEP2_APERTURE_SUN0.0-75.0-34.9-16.8-26.2-14.3-24.9-10.0-22.7-8.6-34.5-13.6-46.3-16.1 USEP1_APERTURE_ANTI_SUN0.0-75.0-33.6-16.6-24.7-10.5-26.3-12.2-33.0-18.7-39.9-25.8-45.2-21.6 USEP2_APERTURE_ANTI_SUN0.0-75.0-34.9-16.9-26.3-14.3-24.9-9.9-23.1-9.0-34.6-13.8-46.3-16.1 USEP1_BOARD0.0-35.0-21.6-3.8-18.2-2.1-20.1-3.9-26.3-13.4-30.1-13.8-30.5-20.7 USEP2_BOARD0.0-35.0-22.6-4.5-20.3-3.9-19.0-3.2-17.5-7.7-22.0-7.1-30.6-21.2 USEP1_SHIELD100.0-100.0-50.3-21.4-30.6-15.9-34.2-5.8-39.5-12.8-50.9-10.4-62.3-5.9 USEP2_SHIELD100.0-100.0-36.0-17.1-26.5-13.7-25.2-10.3-23.3-8.7-35.3-14.4-47.3-16.4 USTA_GRID100.0-100.012.720.017.120.619.322.57.812.34.214.0-7.37.6 USTA_HEMISPHERE40.0-25.012.920.017.020.619.222.57.812.24.414.0-7.27.5 USTA_TOF_BOARD40.0-25.014.520.517.521.119.723.28.412.85.214.5-6.57.8 USTA_BOARD40.0-25.015.421.518.322.020.724.29.413.76.515.4-5.58.9 USWE_GRID -32.7-13.0-32.1-10.2-32.3-10.5-8.80.8-18.0-3.6-31.5-17.7 USWE_HEMISPHERE40.0-25.0-21.4-1.4-21.4-0.4-21.4-2.60.08.7-7.16.1-21.3-5.5 USWE_BASE40.0-25.0-20.8-0.6-20.80.3-20.8-1.90.89.2-6.66.7-20.7-4.7 USWE_BOARD40.0-25.0-20.6-0.3-20.50.6-20.5-1.61.19.6-6.47.1-20.5-4.4 USWI_GRID100.0-100.00.614.96.114.67.015.1-5.14.6-7.66.3-15.9-2.7 USWI_HEMISPHERE40.0-25.00.014.75.814.46.715.0-5.34.3-7.96.0-16.2-2.9 USWI_BOARD40.0-25.02.115.16.214.87.115.1-4.95.2-7.06.9-15.4-2.6 UDPU_BOARD40.0-25.019.620.019.819.919.719.919.7 19.919.720.2 UDPU_BOX40.0-25.019.219.619.319.419.219.419.2 19.419.319.7

21. 7-21 MAVEN Peer Review May 08-10, 2011 Mapping Cold Predicts Sheet:NodeInfomapCd204mapCd415mapCb-80mapCbmidlowmapCb3 Parameter:Red HighRed LowMinMaxMinMaxMinMaxMinMaxMinMax Node/Group [°C] ULPW1_PREAMP70.0-160.0-90.0-23.4-22.3-19.6-40.5-36.1-69.8-31.9-96.2-24.5 ULPW2_PREAMP70.0-160.0-90.4-24.7-23.1-20.4-19.9-18.5-60.5-18.2-95.2-20.4 ULPW1_WHIP70.0-160.0-138.6-12.0-18.3-12.1-44.5-30.7-108.6-25.3-137.8-15.6 ULPW2_WHIP70.0-160.0-138.8-14.8-23.1-16.3-23.1-15.9-103.0-16.0-136.7-9.0 ULPW1_STACER70.0-170.0-148.0-4.8-13.4-7.0-38.0-20.1-114.4-15.2-145.7-7.8 ULPW2_STACER70.0-170.0-148.1-5.4-13.0-6.8-10.8-6.1-110.1-4.7-145.2-2.4 ULPW1_DEPLOYMENT_MECH70.0-160.04.16.64.47.14.35.84.25.84.14.3 ULPW2_DEPLOYMENT_MECH70.0-160.04.16.14.46.54.35.34.25.34.04.3 USEP1_APERTURE_SUN0.0-75.0-61.8-47.9-52.2-42.1-54.6-51.7-60.0-51.6-63.9-54.6 USEP2_APERTURE_SUN0.0-75.0-63.4-48.7-52.0-42.4-52.5-48.3-60.7-48.1-65.4-52.7 USEP1_APERTURE_ANTI_SUN0.0-75.0-62.0-48.1-52.5-42.5-55.0-52.0-60.3-52.0-64.2-55.1 USEP2_APERTURE_ANTI_SUN0.0-75.0-63.5-48.8-52.1-42.5-52.6-48.7-60.8-48.4-65.5-52.9 USEP1_BOARD0.0-35.0-31.4-25.7-30.9-24.2-31.1-30.8-31.3-30.8-31.5-31.1 USEP2_BOARD0.0-35.0-31.5-26.1-30.9-24.6-30.9-30.3-31.3-30.2-31.6-31.0 USEP1_SHIELD100.0-100.0-84.9-59.2-62.6-54.2-63.8-60.8-81.7-61.0-86.6-61.0 USEP2_SHIELD100.0-100.0-64.5-48.9-52.2-42.8-52.8-49.0-61.6-48.7-66.4-53.1 USTA_GRID100.0-100.0-19.10.6-10.82.7-19.9-2.6-20.9-1.2-23.0-9.3 USTA_TOF_BOARD40.0-25.0-18.71.9-10.43.4-19.5-1.8-20.4-0.4-21.9-8.7 USTA_BOARD40.0-25.0-18.02.8-9.74.1-18.8-19.60.4-20.7-8.1 USWE_HEMISPHERE40.0-25.0-21.7-10.3-21.7-10.4-21.3-2.3-21.5-4.1-21.7-11.8 USWE_BASE40.0-25.0-21.2-9.5-21.2-9.6-20.8-1.8-21.0-3.5-21.2-11.1 USWE_BOARD40.0-25.0-21.0-9.2-21.0-9.3-20.5-1.4-20.8-3.1-21.0-10.8 USWI_GRID100.0-100.0-22.8-8.5-20.9-4.9-21.5-12.5-22.6-11.2-22.8-17.9 USWI_HEMISPHERE40.0-25.0-22.8-8.5-20.8-4.8-21.5-12.5-22.7-11.2-22.8-17.8 USWI_BOARD40.0-25.0-20.9-7.1-20.1-4.3-20.4-11.6-20.8-10.3-20.9-17.2 UDPU_BOARD40.0-25.019.519.6 19.719.6 UDPU_BOX40.0-25.019.319.4 Heater Controlled:## Less than 5 C from AFT:## Ouside of AFT:##

22. 7-22 MAVEN Peer Review May 08-10, 2011 Cruise Heater Power Heater ID cruH0968o38cruH0986o62cruH101o5cruC108o25.cruC108o45cruC118o9cruC145o45MAX Steady State Average (W) Heater Size 75% Duty Cycle Heater Size 50% Duty Cycle UCB_DPU_SURV0.0 UCB_SEP1_SURV0.0 0.50.00.80.50.81.02.0 UCB_SEP1_OP0.0 UCB_SEP2_SURV0.0 0.10.50.80.9 1.22.4 UCB_SEP2_OP0.0 UCB_STA_SURV0.0 2.03.71.62.73.75.09.9 UCB_STA_OP0.0 UCB_SWE_SURV0.0 1.71.42.5 3.36.6 UCB_SWE_OP0.0 UCB_SWI_SURV0.0 3.03.32.03.5 4.69.2 UCB_SWI_OP0.0 Total PF Instrument Heater Power 0.0 5.69.36.610.0 13.426.8

23. 7-23 MAVEN Peer Review May 08-10, 2011 Mapping Hot Heater Power Mapping Hot Case Heater Power Heater ID mapHd30mapHd760mapHd70mapHb-80 mapHbmidlo w mapHb3MAX 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 Heater Size 50% Duty Cycle UCB_DPU_SURV0.0 UCB_SEP1_SURV0.0 UCB_SEP1_OP0.0 0.30.21.00.21.01.42.1 UCB_SEP2_SURV0.0 UCB_SEP2_OP0.0 0.21.20.21.21.52.3 UCB_STA_SURV0.0 UCB_STA_OP0.0 UCB_SWE_SURV0.0 UCB_SWE_OP0.43.00.83.10.63.20.0 0.42.80.83.24.36.4 UCB_SWI_SURV0.0 UCB_SWI_OP0.0 Total PF Instrument Heater Power 0.43.00.83.10.63.20.0 0.30.85.10.85.16.710.1

24. 7-24 MAVEN Peer Review May 08-10, 2011 Mapping Cold Heater Power Mapping Cold Case Heater Power Heater ID mapCd204mapCd415mapCb-80mapCbmidlowmapCb3MAX 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 Heater Size 50% Duty Cycle UCB_DPU_SURV0.0 UCB_SEP1_SURV0.0 UCB_SEP1_OP2.02.81.51.92.02.1 2.62.43.02.43.04.06.0 UCB_SEP2_SURV0.0 UCB_SEP2_OP2.02.91.51.81.71.9 2.72.43.12.43.14.16.2 UCB_STA_SURV0.0 UCB_STA_OP0.0 0.11.10.85.60.85.67.411.1 UCB_SWE_SURV0.0 UCB_SWE_OP3.34.93.34.90.13.11.04.13.24.83.34.96.59.7 UCB_SWI_SURV0.0 UCB_SWI_OP2.57.50.42.22.83.92.87.23.77.63.77.610.215.2 Total PF Instrument Heater Power 9.818.16.610.76.711.18.017.712.624.112.624.132.148.2

25. 7-25 MAVEN Peer Review May 08-10, 2011 Lockheed Thermal Memos #1 Ref:ERD Dec 2, 2010, Rev GLaunch SummaryCruise/MOI SummaryScience Summary Temperature Limits (°C )TemperatureNode#TemperatureNode #TemperatureNode# AFT (Op)FA (Op)PF (Op) AFT (Non- Op) PF (Non- Op)(°C) MinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMax PFDPU-2040-2545-3050-2050-3060 20 100 340100 523100 Ref:ERD Dec 2, 2010, Rev GLaunch SummaryCruise/MOI SummaryScience Summary Temperature Limits (°C )TemperatureNode#TemperatureNode #TemperatureNode# AFT (Op)FA (Op)PF (Op) AFT (Non- Op) PF (Non- Op)(°C) MinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMax STATIC-1535-2045-3050-3050-406020 10/11 -53201110-102121110 Ref:ERD Dec 2, 2010, Rev GLaunch SummaryCruise/MOI SummaryScience Summary Temperature Limits (°C )TemperatureNode#TemperatureNode #TemperatureNode# AFT (Op)FA (Op)PF (Op) AFT (Non- Op) PF (Non- Op)(°C) MinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMax SEP-300-355-4010-5560-657020 5/105 -13431055-2118105 STATIC Modeling problem fixed, now looks ok SEP modeling issue found, LM Notified and producing new predicts

26. 7-26 MAVEN Peer Review May 08-10, 2011 Lockheed Thermal Memos #2 Ref:ERD Dec 2, 2010, Rev GLaunch SummaryCruise/MOI SummaryScience Summary Temperature Limits (°C )TemperatureNode#TemperatureNode #TemperatureNode# AFT (Op)FA (Op)PF (Op) AFT (Non- Op) PF (Non- Op)(°C) MinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMax SWEA-2040-2545-3050-2040-3050 20 15 -172415 -17315 Ref:ERD Dec 2, 2010, Rev GLaunch SummaryCruise/MOI SummaryScience Summary Temperature Limits (°C )TemperatureNode#TemperatureNode #TemperatureNode# AFT (Op)FA (Op)PF (Op) AFT (Non- Op) PF (Non- Op)(°C) MinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMax SWIA-2040-2545-3050-2040-3050202110 -18-1010 -18-510 No Issues, but not yet correlated with UCB run

27. 7-27 MAVEN Peer Review May 08-10, 2011 Lockheed Thermal Memos Ref:ERD Dec 2, 2010, Rev GLaunch SummaryCruise/MOI SummaryScience Summary Temperature Limits (°C )TemperatureNode#TemperatureNode #TemperatureNode# AFT (Op)FA (Op)PF (Op) AFT (Non- Op) PF (Non- Op)(°C) MinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMax SWEA-2040-2545-3050-2040-3050 20 15 -172415 -17315 Ref:ERD Dec 2, 2010, Rev GLaunch SummaryCruise/MOI SummaryScience Summary Temperature Limits (°C )TemperatureNode#TemperatureNode #TemperatureNode# AFT (Op)FA (Op)PF (Op) AFT (Non- Op) PF (Non- Op)(°C) MinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMaxMinMax SWIA-2040-2545-3050-2040-3050202110 -18-1010 -18-510 No Issues, but not yet correlated with UCB run

28. 7-28 MAVEN Peer Review May 08-10, 2011 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

29. 7-29 MAVEN Peer Review May 08-10, 2011 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

30. 7-30 MAVEN Peer Review May 08-10, 2011 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_50CPeak_50C Time Step: SS Node/Group Power [W]Temp [°C]Power [W]Temp [°C] Max_BEB 0.656.1 1.563.2 Max_DFB 1.659.4 4.069.8 Max_MAG2 1.159.3 1.566.6 Max_MAG1 1.159.0 1.565.6 Max_DAP2 0.758.4 1.665.9 Max_DAP1 0.759.0 1.667.4 Max_IIB 2.861.5 5.071.1 Max_DCB2 0.056.0 0.061.8 Max_REG2 0.055.2 0.061.0 Max_DCB1 1.258.0 3.267.8 Max_REG1 2.359.2 4.768.9 Total:12.124.5

31. 7-31 MAVEN Peer Review May 08-10, 2011 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/ea/e Sample200K300K400K Absorptance200K300K400K DAG 213 Before AO0.7220.7440.7620.9211.281.241.21 DAG 213 After 2.1E+20 atoms/cm2 AO fluence0.4930.5280.5540.6511.321.231.18 DAG 213 After 9.3E+20 atoms/cm2 AO fluence0.0410.0350.0280.2425.906.918.64

32. 7-32 MAVEN Peer Review May 08-10, 2011 Backup Slides Back Up Slides

33. 7-33 MAVEN Peer Review May 08-10, 2011 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

34. 7-34 MAVEN Peer Review May 08-10, 2011 LM Launch/Initial Acquisition Case Definitions Case ID/Analysis CaseCase Description 1001_Launch_Prelaunch_Hot Prelaunch Hot, Steady-State 1002_Launch_Prelaunch_Cold Prelaunch Cold, Steady-State 1003_Launch_Boost_Hot Launch Hot, Liftoff to Payload Fairing Jettison 1013_Launch_Boost_ColdLaunch Cold, Liftoff to Payload Fairing Jettison 1004A_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, Open 1005A_Launch_Centaur_Mid_Hot Launch Hot, PLF to S/C Separation, Mid 1015A_Launch_Centaur_Mid_ColdLaunch Cold, PLF to S/C Separation,Mid 1006A_Launch_Centaur_Close_Hot Launch Hot, PLF to S/C Separation, Close 1016A_Launch_Centaur_Close_ColdLaunch Cold, PLF to S/C Separation, Close 1004B_Launch_Sep_Initial Config_SA_Stowed_Open_Hot Launch Hot, S/C Sep to SA Deployment, Open 1014B_Launch_Sep_Initial Config_SA_Stowed_Mid_Hot Launch Cold, S/C Sep to SA Deployment, Open 1005B_Launch_Sep_Initial Config_SA_Stowed_Mid_Hot Launch Hot, S/C Sep to SA Deployment, Mid 1015B_Launch_Sep_Initial Config_SA_Stowed_Mid_ColdLaunch 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, Close 1016B_Launch_Sep_Initial Config_SA_Stowed_Close_Cold Launch Cold, S/C Sep to SA Deployment,Close 1004C_Launch_Sep_Initial Config_SA_Deployed_Open_Hot Launch Hot, SA Deployed, Open 1014C_Launch_Sep_Initial Config_SA_Deployed_Open_ColdLaunch Cold, SA Deployed, Open 1005C_Launch_Sep_Initial Config_SA_Deployed_Mid_Hot Launch Hot, SA Deployed, Mid 1015C_Launch_Sep_Initial Config_SA_Deployed_Mid_ColdLaunch Cold, SA Deployed, Mid 1006C_Launch_Sep_Initial Config_SA_Deployed_Close_Hot Launch Hot, SA Deployed Close 1016C_Launch_Sep_Initial Config_SA_Deployed_Close_ColdLaunch Cold, SA Deployed Close

35. 7-35 MAVEN Peer Review May 08-10, 2011 LM Cruise Case Definitions Case ID/Analysis Case Case Description Solar Distance (AU) Solar Intensity (W/m 2 ) 2001_Hot_Early Cruise_096AU_60SOP Hot Early Cruise at 0.96 Solar Range, 60° Solar Offpoint0.961481 2002_Hot_Early Cruise_096AU_45SOP Hot Early Cruise at 0.96 Solar Range, 45° Solar Offpoint0.961481 2003_Hot_Middle Cruise_113AU_9SOP Hot Middle Cruise at 1.13 Solar Range, 9° Solar Offpoint1.131087 2011_Cold_Middle Cruise_123AU_9SOP Cold Middle Cruise at 1.23 Solar Range, 9° Solar Offpoint1.23917 2012_Cold_Late Cruise_144AU_9SOP Cold Late Cruise at 1.44 Solar Range, 9° Solar Offpoint1.44669 2013_Cold_Late Cruise_144AU_45SOP Cold Late Cruise at 1.44 Solar Range, 45° Solar Offpoint1.44669 2014_Cold_Early Cruise_099AU_60SOP Cold Early Cruise at 0.99 Solar Range, 60° Solar Offpoint 0.991416

36. 7-36 MAVEN Peer Review May 08-10, 2011 LM MOI Case Definitions Case ID/Analysis Case Case Description Solar Distance (AU) Solar Intensity per TSS (W/m 2 ) 3001_MOI_Hot_Open MOI Hot, Open1.426710 3002_MOI_Hot_Mid MOI Hot, Mid1.422710 3003_MOI_Hot_Close MOI Hot, Close1.420710 3004_MOI_Cold_Open MOI Cold, Open 1.426490 3005_MOI_Cold_Mid MOI Cold, Mid 1.422490 3006_MOI_Cold_Close MOI Cold, Close1.420490

37. 7-37 MAVEN Peer Review May 08-10, 2011 LM Science Case Definitions Case ID/Analysis Case Case Description Solar Distance (AU) Solar Intensity (W/m 2 ) 5001_Cold_Science_Earth Comm Cold Science, Earth Comm Orbit with Max Eclipse of 75 min.1.68490 5002_Cold_Science_Scenario 1 Cold Science, Scenario 1 Orbit with Max Eclipse1.68490 5003_Cold_Science_Scenario_2 Cold Science, Scenario 1a Orbit with Max Eclipse1.68490 5010_Hot_Science_Earth Comm Hot Science, Earth Comm Orbit with No Eclipse1.40710 5011_Hot_Science_Scenario_1 Hot Science, Scenario 1 Orbit with No Eclipse1.40710 5012_Hot_Science_Scenario_2 Hot Science, Scenario 1a Orbit with No Eclipse1.40710 Case ID/Analysis Case Case Description Solar Distance (AU) Solar Intensity (W/m 2 ) 6001_Hot_Science_Deep_Dip_+Z_FMH Hot Science, Deep Dip with Aeroheating FMH Applied in +Z Direction1.40710 6002_Hot_Science_Deep_Dip_-Z_FMH Hot Science, Deep Dip with Aeroheating FMH Applied in -Z Direction1.40710 6003_Hot_Science_Deep_Dip_+Y_FMH Hot Science, Deep Dip with Aeroheating FMH Applied in +Y Direction1.40710 6004_Hot_Science_Deep_Dip_-Y_FMH Hot Science, Deep Dip with Aeroheating FMH Applied in -Y Direction1.40710 6005_Hot_Science_Deep_Dip_+X_FMH Hot Science, Deep Dip with Aeroheating FMH Applied in +X Direction1.40710 6006_Hot_Science_Deep_Dip_-X_FMH Hot Science, Deep Dip with Aeroheating FMH Applied in -X Direction1.40710 Science Cases Deep Dip Cases