1. Ozone Mapping and Profiler Suite Export Control Notice - Export or re-export of information contained herein may be subject to restrictions and requirements of U.S. export laws and regulations and may require advance authorization from the U.S. government. 6 November 2008 H - 1 Residual Risk Assessment at Delivery – Delta from PSR Jeff Radwick OMPS Project Engineer/Risk Manager Residual Risk Assessment

2. Ozone Mapping and Profiler Suite H - 2 Export Control Notice - Export or re-export of information contained herein may be subject to restrictions and requirements of U.S. export laws and regulations and may require advance authorization from the U.S. government. 6 November 2008 Agenda 1.Risk Scoring Criteria 2.Was-Is Matrix (with waivers) 3.Was-Is Table (with waivers) 4.Yellow Risk Charts 5.FM2 Impact on PFM Residual Risk Residual Risk Assessment

3. Ozone Mapping and Profiler Suite H - 3 Export Control Notice - Export or re-export of information contained herein may be subject to restrictions and requirements of U.S. export laws and regulations and may require advance authorization from the U.S. government. 6 November 2008 Risk Scoring Criteria Risk Management EID – End-Item Delivery IPD – IPT Product Delivery LevelLikelihood of Occurrence 5 Near Certainty 90% + 4 Highly Likely 50-90% 3Likely 30-50% 2Unlikely 10-30% 1Remote <10% Risks discussed today are technical risks

4. Ozone Mapping and Profiler Suite H - 4 Export Control Notice - Export or re-export of information contained herein may be subject to restrictions and requirements of U.S. export laws and regulations and may require advance authorization from the U.S. government. 6 November 2008 Residual Risk Summary Residual Risk Assessment LIKELIHOOD 5 4 3 2 1 12345 IMPACT LIKELIHOOD 5 4 3 2 1 12345 IMPACT 12 11 1 1 1 4 Was at PSRIs at Delta-PSR 1842 1 1 1 2 13 The delta in number is due almost solely to approved waivers ― They predominantly are of negligible risk factor score (RFS) The trend globally is down and to the left, indicating an improved risk picture from that presented at PSR

5. Ozone Mapping and Profiler Suite H - 5 Export Control Notice - Export or re-export of information contained herein may be subject to restrictions and requirements of U.S. export laws and regulations and may require advance authorization from the U.S. government. 6 November 2008 Residual Risk Summary ItemRisk Title Likelihood - Was Impact - Was Risk Score - Was Likelihood - Is Impact - Is Risk Score - Is 1 EMI / EMC Performance (Waivers 21164-W-28, 29, 39)3412248 2Radiation Effects on CCDs (Waiver 21164-W-36)521052 3No Vibration Testing of ISS Configuration248122 4Stray Light on Nadir Sensor (Waiver 21164-W-27)5151 (3)2 (3)2 (9) 5Interchannel Accuracy (Waiver 21164-W-31)515515 6 Single Event Latchup of LTC1419 A/D Converter (Waiver 21164-W-16)155133 7 Parts Not Compliant With Program Derating Requirements (Waiver 21164-25)155122 8Weak Bit in Hitachi EEPROMs in SBC155155 9 Single Point Failure in TEC Control Circuitry (Waiver 21164-W-35)155133 10 Spectral / Spatial Stability of Nadir Spectrometers133133 11On-Orbit EEPROM Reprogramming224224 12 1553 Compliance Testing (Waiver 21164-W-4) 212515 Residual Risk Assessment - No change in status from PSR

6. Ozone Mapping and Profiler Suite H - 6 Export Control Notice - Export or re-export of information contained herein may be subject to restrictions and requirements of U.S. export laws and regulations and may require advance authorization from the U.S. government. 6 November 2008 Residual Risk Summary ItemRisk Title Likelihood - Was Impact - Was Risk Score - Was Likelihood - Is Impact - Is Risk Score - Is 13Disturbance Torques (Waivers 21164-W-5)---414 14Captive Hardware (Waiver 21164-W-8)---515 15Redundant Survival Heaters (Waiver 21164-W-9)---515 16 MEB Survival Heater Setpoints (Waiver 21164-W- 12)---515 17 Heat Transfer to the Spacecraft (Waivers 21164-W- 13)---414 18Space Charging (Waiver 21164-W-14)---515 19Conformal Coating of the GSE (Waiver 21164-W-15)---515 20 Material and Coating Outgassing (Waiver 21164-W- 17)---111 21Nickel Plating (Waiver 21164-W-18)---515 22MGSE Design Safety Factors (Waiver 21164-W-19)---155 23 Kill Switch for High DC Voltage GSE (Waiver 21164- W-20)---515 24 Discrete Commands and Telemetry (Waiver 21164- W-21)---515 Residual Risk Assessment

7. Ozone Mapping and Profiler Suite H - 7 Export Control Notice - Export or re-export of information contained herein may be subject to restrictions and requirements of U.S. export laws and regulations and may require advance authorization from the U.S. government. 6 November 2008 Residual Risk Summary ItemRisk Title Likelihood - Was Impact - Was Risk Score - Was Likelihood - Is Impact - Is Risk Score - Is 25Series Redundant Diodes (Waivers 21164-W-23)---122 26Static Envelope (Waiver 21164-W-26)---515 27 Primary to Redundant Interface Isolation (Waiver 21164-W-32)---515 28Shock Sensitive Parts (Waiver 21164-W-34)---122 29 Correlated Thermal Model Margins (Waivers 21164-W-37)---515 30Displacement Damage (Waiver 21164-W-38)---122 31Boresight Shift---212 32EEPROM reset---133 33GD SBC Solder Joint Stress Marks---122 35 Wrong solder on s-leads on Motor Drive PWA parts---122 Residual Risk Assessment

8. Ozone Mapping and Profiler Suite H - 8 Export Control Notice - Export or re-export of information contained herein may be subject to restrictions and requirements of U.S. export laws and regulations and may require advance authorization from the U.S. government. 6 November 2008 Residual Risk # 1: EMI / EMC Performance Risk Statement OMPS EMI / EMC outages will impact system performance. Ref. Risks OMPSR029, OMPSR043; MDRs C032823, C032824, C032825; Waivers 21164-W-28, 29, 39 Likelihood 2 – Unlikely Impact 4 – Degraded System Performance Affects image noise and CCD temperature control. Impact quantified. Background The Nadir Profiler and the Nadir Total Column spectrometers are non-compliant with performance requirements in levels in specific frequencies in the 10 to 350 MHz range (RS103). The Nadir Profiler is non-compliant with performance requirements at the specified limit levels. The Nadir Total Column sensor meets all performance requirements (CS114). Mitigation Waivers 21164-W-28, 29, 39 are approved. Options exists for NP ozone retrieval: 1) Develop an algorithmic approach to correct for the incorrect dark current by reading the dark current from an unlit portion of the focal plane for each image on the NP. 2) Eliminate the 252 nm channel from data processing of the NP since it is redundant with the 273.61 nm channel. LIKELIHOOD 5 4 3 2 1 12345 IMPACT Residual Mission Risk Residual Risk Assessment

9. Ozone Mapping and Profiler Suite H - 9 Export Control Notice - Export or re-export of information contained herein may be subject to restrictions and requirements of U.S. export laws and regulations and may require advance authorization from the U.S. government. 6 November 2008 Residual Risk # 2: Radiation Effects on CCDs Risk Statement Radiation environment will degrade signal-to-noise ratio to some degree. Ref. Risk OMPSR014, OMPR046; Waiver 21164-W-33 Likelihood 5 – Near certainty during South Atlantic Anomaly (SAA) transits only (~9% of imaging) Impact 2 – Low impact during SAA transits Background An analysis of the effects of radiation events on CCDs and their impact to ozone retrieval performance indicates degraded performance while transiting the. Mitigation Waiver approved for Nadir Profiler secondary ozone products; Total Column performance impacts accommodated in OMPS error budgets. LIKELIHOOD 5 4 3 2 1 12345 IMPACT Residual Mission Risk Residual Risk Assessment

10. Ozone Mapping and Profiler Suite H - 10 Export Control Notice - Export or re-export of information contained herein may be subject to restrictions and requirements of U.S. export laws and regulations and may require advance authorization from the U.S. government. 6 November 2008 Residual Risk # 8: Weak Bit in Hitachi EEPROMs in Single Board Computer Risk Statement All four SBC EEPROMs might have read errors that exceed the EDAC ability to correct Likelihood 1 – Remote Impact 5 – Mission Objectives at Risk The MEB will be unable to boot. Background Each GD SBC has two redundant EEPROMs. NASA issued a GIDEP alert on these components due to the potential of weak stored bits. BATC developed the capability of refreshing the EEPROMs on-orbit. Mitigation Analysis shows likelihood to be highly unlikely. Additional vendor testing was put in place for this specific Lot Date Code. EEPROM refresh capability on-orbit is implemented and FQT’d Accept this risk. LIKELIHOOD 5 4 3 2 1 12345 IMPACT Residual Mission Risk Residual Risk Assessment

11. Ozone Mapping and Profiler Suite H - 11 Export Control Notice - Export or re-export of information contained herein may be subject to restrictions and requirements of U.S. export laws and regulations and may require advance authorization from the U.S. government. 6 November 2008 Residual Risk # 22: MGSE Design Safety Factors Risk Statement MGSE could fail, resulting in damage to the OMPS hardware and/or personnel Ref. Waiver 21164-W-19 Likelihood 1 – Remote Impact 5– High due to resulting damage to hardware or injury to personnel if the MGSE were to fail Background MGSE was not analyzed for a 5x safety factor on ultimate and a 3x safety factor on yield. If the existing MGSE is re- analyzed, some non-lifting components do not have positive margins with a 5x safety factor on ultimate and a 3x safety factor on yield. Mitigation The probability of GSE failing is very low since GSE was proof-load tested to 2x the working load. Lifting & handling fixtures were subsequently analyzed and passed the 5x safety factor with positive margin; RFS was from the original waiver and should be lowered. Accept this risk. LIKELIHOOD 5 4 3 2 1 12345 IMPACT Residual Mission Risk Residual Risk Assessment

12. Ozone Mapping and Profiler Suite H - 12 Export Control Notice - Export or re-export of information contained herein may be subject to restrictions and requirements of U.S. export laws and regulations and may require advance authorization from the U.S. government. 6 November 2008 Other Residual Risks to the Mission Stray Light on Nadir Sensor (3,3) or (1,2) –NPP stray light sources will be seen by Nadir instrument during on-orbit calibrations –Waiver submitted communicates the need to add black Kapton tape to sun sensor mast on NPP to the next level of integration –Diffuse scatter test (glint test) successfully completed –Risk factor score is a 9 if NPP mitigation is not done LIKELIHOOD 5 4 3 2 1 12345 IMPACT Residual Risk Assessment

13. Ozone Mapping and Profiler Suite H - 13 Export Control Notice - Export or re-export of information contained herein may be subject to restrictions and requirements of U.S. export laws and regulations and may require advance authorization from the U.S. government. 6 November 2008 FM2 Impact on PFM Residual Risk BATC OMPS conducted an assessment of FM2 design changes and their impact to the PFM residual risk at delivery –All FM2 design changes are the result of process and/or design improvements derived as result of the experience gained on the PFM. »These are summarized in the backup slides »Technical (performance) risks are derived from requirements –If a non-compliance on the PFM drove the change on FM2, a waiver was submitted and approved Therefore BATC-OMPS concludes that FM2 changes do not cause any change to the PFM residual risk state at delivery Residual Risk Assessment

14. Ozone Mapping and Profiler Suite H - 14 Export Control Notice - Export or re-export of information contained herein may be subject to restrictions and requirements of U.S. export laws and regulations and may require advance authorization from the U.S. government. 6 November 2008 Risk Summary & Recommendation All risks are understood and mitigation plans are either completed or addressed during sell-off / waiver process The OMPS PFM residual risk at delivery is assessed to be low-moderate Residual Risk Assessment

15. Ozone Mapping and Profiler Suite Export Control Notice - Export or re-export of information contained herein may be subject to restrictions and requirements of U.S. export laws and regulations and may require advance authorization from the U.S. government. 6 November 2008 H - 15 Backup Slides Residual Risk Assessment

16. Ozone Mapping and Profiler Suite H - 16 Export Control Notice - Export or re-export of information contained herein may be subject to restrictions and requirements of U.S. export laws and regulations and may require advance authorization from the U.S. government. 6 November 2008 Mechanical Design Changes –Changed NP mechanical design to match Code V model (address salvage EO) –Changed interface for optical mounts to spherical washers on spherical seats (boresight FRB) –Changed TC spectrometer slit from bonded to clamped assembly (reduce thermal “puckering”) –Changed sunshade design (mitigate glint issue) –Added relief to LED housing (prevent shorting) –Changed to finer grind on aluminum diffusers (improved diffuser BRDF) –Changed diffuser mount to external (allows diffuser replacement without telescope disassembly) –Added board stiffeners to FPA PWA (reduce flexing in vibration environments) Optical Design Changes –Minor improvements to stray light and light leak –Changed coating on fused silica optical cubes from chrome to aluminum (meet 80% requirement) Electrical Design Changes –Reduced use of Tiodize and added grounding straps (EMI/EMC mitigation) –Added insulation pad underneath thermostats (prevent shorting) –Added twisting/shielding to FPA temp sense diode wiring and change routing (EMI/EMC mitigation) –Minor changes in FPA PWA design (improved full well performance) NPOESS Specific Design Changes –Additional optical cube with 15-deg rotation for NPOESS (at NGST request) Nadir Design Changes for FM2 Are Primarily Based on PFM Lessons Learned OMPS Delta PSR

17. Ozone Mapping and Profiler Suite H - 17 Export Control Notice - Export or re-export of information contained herein may be subject to restrictions and requirements of U.S. export laws and regulations and may require advance authorization from the U.S. government. 6 November 2008 MEB Design Changes for FM2 Are Based on PFM Lessons Learned and De-Manifest of Limb Sensor Mechanical Design Changes –Reduced diameter of cable harness support bars (allows MLI to lay more flush with top of MEB) –Minor changes to MEB mounting spacers (facilitate easier AI&T) Electrical Design Changes –Modified survival heater wiring (to meet MEB spec) –Added resistors across MEB thermostats (eliminate floating wires) –Motherboard: added 1 white wire (allows MEB to process NP housing temp sensor) –Motherboard: remove 1553 transformer center tap chassis ground (proposed) –Nadir T&C: removed common mode chokes in CCD bias rails (reduces rail sag while clocking) –Nadir SP: changed filter caps and added.5 ohm in series with tantalum caps (improved stability) –LVPS1: changed linear regulators (increase margin on WCA) –LVPS2: lowered temperature on Vref & added test point isolation resistors (temperature de- rating) NPOESS Specific Design Changes –Limb T&C and SP: changed to Limb replacement board (provides signal termination) –Added dust covers and associated hardware to unused connectors –Revised cable routing and added cable harness routing supports –Modified chassis surface finish (to meet NPOESS thermal requirements) OMPS Delta PSR