Final_Draft_Phase_A_SOW.pdf

Wide Field Infrared Survey Telescope (WFIRST)

Project Office

Code 448

Wide Field Instrument (WFI) Industry Phase A Study

Statement of Work (SOW)

July 25, 2016

Goddard Space Flight Center

Greenbelt, Maryland

National Aeronautics and

Space Administration

TABLE OF CONTENTS

Page

1.0 INTRODUCTION

2.0 RELATED DOCUMENTS

2.1 APPLICABLE DOCUMENTS

2.2 REFERENCE DOCUMENTS

3.0 STUDY ASSUMPTIONS

4.0 WORK TO BE PERFORMED

4.1 TRADE STUDIES AND GENERAL ANALYSES

4.1.1 The contractor shall perform the following trade studies and report on the results at the First

Review

4.1.2 The contractor shall perform the following analyses and modeling and report on the results at the

Final Review

5.0 DELIVERABLES AND REPORTING

5.1 KICK-OFF MEETING - TO BE HELD AT THE CONTRACTOR'S FACILITY

5.2 TECHNICAL INTERCHANGE MEETINGS

5.3 FIRST REVIEW - TO BE HELD AT THE NASA GODDARD SPACE FLIGHT CENTER

5.4 SECOND REVIEW (PRELIMINARY COST AND SCHEDULE REVIEW) - TO BE HELD AT THE CONTRACTOR'S FACILITY

5.5 FINAL REVIEW (STUDY SYSTEM REQUIREMENTS REVIEW, SSRR) - TO BE HELD AT THE CONTRACTOR'S FACILITY

5.6 ACTION ITEM REVIEW AND FINAL REPORT PACKAGE

1.0 Introduction

The Wide Field Infrared Survey Telescope (WFIRST) Wide Field Instrument (WFI) consists of a combination wide field imaging and spectrographic channel, the Wide Field Channel (WFC), and a narrow field spectrographic Integral Field Channel (IFC). The two channels, with their associated optics and cold electronics are located in an on-orbit replaceable Cold Sensor Module (CSM) beneath the

WFIRST Optical Telescope Assembly (OTA). The WFI warm electronics are located in an on-orbit replaceable Warm Electronics Module (WEM) on the spacecraft bus. The entire WFI, except for the two Focal Plane Assemblies (FPAs) in the WFC (Wide Field (WF) FPA and Auxiliary Guider (AG)

FPA) and their associated electronics and flight software in the Focal Plane Electronics (FPE) and

Instrument Command and Data Handling (ICDH) boxes, the WFC filters and grism, the IFC, and the

Relative Calibration System, and Electronics, (RCS and RCSE) are referred to as the WFI Opto-

Mechanical Assembly (WOMA) and would be designed, built, aligned, and tested by a flight contractor and delivered to GSFC. The distribution of WFI subsystems and components between the CSM and

WEM and by WOMA and Government Furnished Equipment (GFE) is shown in the function block diagram in Fig. 1.

This study should assume a flight hardware phase (under separate procurement) that would result in delivery of the WOMA as a flight deliverable. WOMA and WFI integration and test would be conducted at the contractor facility, or at the Goddard Space Flight Center (GSFC), or at a combination of the two facilities. The instrument level calibration would be conducted by GSFC with support by the flight contractor. In the event of any differences between the above description and the description included in the WFIRST Phase A Study Wide Field Instrument Opto-Mechanical Assembly

Requirements Document (WOMARD), the WOMARD shall take precedence.

This statement of work (SOW) specifies the vendor requirements for performing definition-phase studies and design development as part of the WFI formulation activities.

The work described in this SOW is not all of equal importance or weight. The term "shall" designates the most important weighting level; that is, mandatory. Any deviations from these contractually imposed mandatory items require the approval of the contracting officer. A lesser term, "should", designates attributes that the Government values, but which are subject to trade off decisions. Such attributes may render the deliverable item more valuable to the Government, but the absence of such attributes will not render the item unacceptable.

Figure 1. Functional block diagram of the WFIRST WFI instrument. The Government retains responsibility for the design, fabrication, and test of the WF FPA, AG FPA, Element Wheel mounted optical elements (filters and grism), IFC, ICDH, FPE, RCS/RCSE, blind-mate electrical connector assembly, and Inter Module Harness

(IMH). The Industry partner would have responsibility for the design, fabrication, and test of the WFI CSM structure, WFC tip-tilt-focus mirror assembly (F2), Element Wheel (EW) assembly (including the Element

Wheel, mechanism, electronics, and FSW if any, but not the mounted optics), Mechanism Control Electronics

(MCE), Cold Optics Baffle Assembly (COBA), Thermal Control System including external radiator and cryocooler assembly, electronics, and FSW, and active latch (A latch) drive assembly; designated the WFI Opto-

Mechanical Assembly (WOMA) and would support the integration and test of the Government sub-assemblies to complete the WFI.

2.0 Related Documents

Documents relating to this study are available, either at the provided links or by request via NASA file transfer protocol.

2.1 Applicable Documents

The documents listed in this section apply directly to the performance of the study contract. These documents establish detailed specifications, requirements, and interface information necessary for the performance of the contract.

WFIRST Phase A Study Wide Field Instrument Opto-Mechanical Assembly Requirements Document

WFIRST Phase A Study Wide Field Instrument Verification and Validation Plan

WFIRST Phase A Study Mission Assurance Requirements

WFIRST Phase A Study Spacecraft to Wide Field Instrument Mechanical Interface Control Drawing

WFIRST Phase A Study WOMA-Wide Field FPA Interface Requirements Document

WFIRST Math Model Guidelines

GSFC INST-EEE-002 Instruction for EEE Parts Selection, Screening, Qualification, and Derating

2.2 Reference Documents

The following documents are for reference only.

WFIRST Wide Field Instrument Operations Concept

WFIRST Acronym List

3.0 Study Assumptions

During the course of the study, the contractor shall assume:

SA-1. The WFIRST Observatory will be deployed into a Sun-Earth L2 Lagrange point orbit.

SA-2. The WFIRST Observatory will be designed to be serviced in-flight by a yet to be defined robotic servicing vehicle.

SA-3. The WFIRST Observatory will be launched on a heavy lift launch vehicle acquired by NASA.

SA-4. The WFIRST Optical Telescope Assembly will contain the primary, secondary, and tertiary mirrors for the Wide Field Channel (WFC) and Integral Field Channel (IFC) and thus present a diffraction limited image to both channels in the Wide Field Instrument (WFI).

SA-5. The WFI will consist of an on-orbit replaceable Cold Sensor Module (CSM) mounted in the observatory Instrument Carrier and an on-orbit replaceable Warm Electronics Module (WEM) located in the spacecraft.

SA-6. Guide star tracking information will be read from the WFI electronics by the spacecraft for incorporation into the observatory Guidance, Navigation, and Control (GN&C) solution.

SA-7. The spacecraft will provide all electrical and electronic harnesses and connectors between the

WFI CSM and the WEM.

SA-8. The following power, command, telemetry, and control services will be provided to the WFI

Opto-Mechanical Assembly (WOMA)

SA-8.1. Primary and redundant main power from the spacecraft to the ICDH and power distribution by the ICDH to the WFI subsystems, including the WOMA (cross-strapped primary and redundant).

SA-8.2. Primary and redundant survival heater power and switching from the spacecraft.

SA-8.3. Telemetry collection by the ICDH.

SA-8.4. Spacecraft collection of health and safety telemetry that is not collected by the ICDH

(e.g. spacecraft read thermistors and current draw).

SA-8.5. Commanding of WOMA mechanisms (e.g. F2, EW) and thermal set points (e.g.

thermal control zones and cryocooler heat exchanger)

SA-9. GSFC will furnish the optical prescription for the WFIRST Optical Telescope Assembly (OTA) and WFI filters and grism via the WFIRST Phase A Study Wide Field Instrument Opto-

Mechanical Assembly Requirements Document.

SA-10. GSFC will design, build, test, and qualify the following flight model components and subsystems of the WFI and provide them for WOMA or WFI I&T as Government Furnished Equipment

(GFE):

SA-10.1. WFI focal plane assemblies (WF FPA, AG FPA, and IFC FPA) and the electronics and

FSW (FPE and ICDH) that control, read, and process guide star data from the WFI

FPAs.

SA-10.2. Optical elements for the Element Wheel (bandpass filters and grism).

SA-10.3. WFI blind mate electrical connector mechanisms.

SA-10.4. Robotic interface plate for the active latch mechanism (A latch).

SA-10.5. IFC and the electronics (and FSW, if any) that control, read, and process data from the

IFC. This includes any mechanisms contained in the IFC

SA-10.6. RCS and the electronics (and FSW, if any) that control the RCS. This includes any mechanisms contained in the RCS.

SA-10.7. WEM with WEM-to-SC blind mate connector.

SA-11. GSFC will provide the following Ground Support Equipment (GSE) for use in WOMA and/or

WFI-level development, integration, and test:

SA-11.1. WFI Test Set and associated cables to electrically interface with the ICDH. This is a simulator of the ground system and spacecraft that performs:

Collection of spacecraft direct telemetry

Collection of telemetry from the ICDH

Collection of science data from the ICDH

Transmission of commands, sequences, and FSW loads to the ICDH

SA-11.2. A simulator of the ICDH that performs:

Collection of ICDH collected telemetry

Transmission of commands to WOMA actuators (EW and F2 mounts) and thermal control systems

Transmission of commands to CryoCooler Electronics (CCE)

Transmission of commands to IFC actuators (in case flight IFC is integrated before flight ICDH)

Transmission of commands to RCS actuators (in case flight RCS is integrated before flight ICDH)

Transmission of commands to FPE (in case flight FPE is integrated before flight

ICDH)

SA-11.3. A surrogate WF FPA, and associated test set and cabling, for use by the WOMA provider to align the WOMA optics, as described in the WFIRST Phase A Study

WOMA-Wide Field FPA Interface Requirements Document.

SA-11.4. A surrogate AG FPA, and associated test set and cabling, for use by the WOMA provider to align the WOMA optics, similar to the surrogate WF FPA.

SA-11.5. A surrogate of the Inter-Module Harness for connecting the CSM and WEM during

WFI-level testing.

SA-11.6. Data analysis workstations required for WFI-level verification and calibration.

SA-11.7. Optical stimulus that accurately represents the optical beams to the WFC and IFC focal planes from the WFIRST OTA.

SA-11.8. IFC mechanical simulator that accurately represents the volume, mass properties, and mechanical interfaces of the IFC.

SA-11.9. RCS mechanical simulator that accurately represents the volume, mass properties, and mechanical interfaces of the RCS.

SA-11.10. A surrogate of the OTA side of the WFI Labyrinth Seal.

SA-12. GSFC will design, build, test, and qualify the WFI serviceable latches and install them during

Payload I&T.

SA-13. The contractor will design, build, test, and qualify the Opto-Mechanical Assembly (WOMA) as specified in the WFIRST Phase A Study Wide Field Instrument Opto-Mechanical Assembly

Requirements Document.

SA-14. The WOMA electronics (and FSW, if any) are responsible for:

SA-14.1. Control of any operational heaters (e.g. on the Optical Bench)

SA-14.2. Control of the cryocooler (i.e. ICDH commands a temperature set point and the cryocooler electronics and FSW performs the control)

SA-14.3. Control of all mechanisms (EW and F2 mount)

SA-15. The contractor will be responsible for verifying the performance of and flight qualification of the

WOMA prior to integration of the WFI flight model focal plane assemblies (FPAs), filters, grism, RCS, and the IFC.

SA-16. The contractor will integrate the GSFC provided FPAs, filters, grism, RCS, IFC, FPE, ICDH, and blind mate electrical connector with GSFC support.

SA-17. GSFC will be responsible for verifying the performance of and flight qualification of the integrated WFI prior to delivery to GSFC, per the WFIRST Phase A Study Wide Field

Instrument Verification and Validation Plan.

SA-18. The contractor will conduct the testing of the integrated WFI prior to delivery to GSFC, with

GSFC support, per the WFIRST Phase A Study Wide Field Instrument Verification and

Validation Plan.

SA-19. GSFC will perform WFI-level science calibration during the WFI-level test program (e.g. as part of the WFI-level thermal vacuum test).

SA-20. WOMA-level and WFI-level integration and test flow should use the optimal combination of contractor and GSFC facilities, as recommended by the contractor and determined by the

WFIRST project, to minimize the risk, cost, and schedule.

SA-21. Contractor WOMA personnel will support the WFI calibration, and payload and spacecraft integration activities at GSFC.

SA-22. In addition to the flight WOMA, the contractor will deliver the following GSE:

SA-22.1. WOMA Electrical Simulator to support WFI ICDH and spacecraft CDH development.

The WOMA electrical simulator will simulate all commandable components (e.g.

mechanisms and relays), sensors (e.g. temperature) and loads (e.g. heaters) included in the contractor's deliverable.

SA-22.2. WFI Lifting Fixture

SA-22.3. WFI Support Stand

SA-22.4. WFI Rotation Fixture

SA-22.5. WFI Transport Cart

SA-22.6. WFI Shipping Container

SA-22.7. WFI Purge Tent

SA-23. All other required GSE not explicitly listed in these assumptions will be identified and provided by the contractor.

SA-24. Notional schedule for planning purposes:

SA-24.1. Flight hardware phase (under separate procurement) award at beginning of FY2018.

SA-24.2. WF FPA, AG FPA, IFC, filters, grism, FPE, ICDH, WEM, CSM blind mate connector ready to integrate into WOMA by January 2021.

SA-24.3. WFI pre-ship (to payload I&T) review (PSR) in March 2022 (schedule preceding pre-ship must include 30 days in thermal/vacuum at operating temperature for instrument level calibration prior to PSR).

SA-24.4. Planned launch NET August 2024.

SA-24.5. Planned mission life of 6.25 years.

4.0 Work to be performed

The contractor shall analyze the WFI Opto-Mechanical Assembly (WOMA) functional, performance, interface, mission assurance, and verification requirements as specified in the WFIRST Phase A Study

WFI Opto-Mechanical Assembly Requirements Document (WOMARD) and the other Applicable

Documents (Section 2.1 of this SOW), in the context of the above assumptions, and define subsystem requirements and design concepts to the degree required to proceed with preliminary design of the

WOMA under separate contract if awarded.

4.1 Trade Studies and General Analyses

4.1.1 The contractor shall perform the following trade studies and report on the results at the

First Review.

4.1.1.1 The contractor shall trade options and recommend a preferred solution of material choice, mounting, and fabrication approaches for the WOMA F2 mirror. The goal is to minimize cost, schedule, and risk while meeting all performance requirements.

4.1.1.2 The contractor shall trade options and recommend a preferred solution of material choice and fabrication approaches for the WOMA structures. The goal is to minimize cost, schedule, and risk while meeting all performance requirements.

4.1.1.3 The contractor shall identify an optical alignment and stability verification approach for the

WOMA that simultaneously optimizes schedule efficiency while minimizing the risk of failure to succeed in the optical alignment and verification in the planned schedule. All required Ground Support

Equipment (GSE) shall be identified. Any required development of that GSE shall be included in the

WOMA cost and schedule estimates.

4.1.1.4 The contractor shall trade options and recommend a preferred solution for the mechanism(s) needed to place the GFE filters and grism into the optical beam to the required performance and reliability requirements. The goal is to minimize cost, schedule, and risk while meeting all performance requirements. Options for appropriate application of heritage designs are of particular interest.

4.1.1.5 The contractor shall trade options and recommend a preferred solution for components and architecture to meet the WOMA thermal requirements. The goal is to minimize cost, schedule, and risk while meeting all performance requirements.

4.1.1.6 The contractor shall trade options and recommend a preferred solution for components and architecture to meeting the WFI focal plane (WF, AG, and IFC) thermal requirements. The goal is to minimize cost, schedule, and risk while meeting all performance requirements.

4.1.1.7 The contractor shall identify the WOMA design, cost, and risk drivers and recommend at the

First Review requirements modifications that would make the WOMA more cost effective to develop and produce. In so doing, the contractor shall evaluate all requirements in, and referenced by, the

WOMARD in terms of cost effectiveness, performance, and risk, and recommend by the First Review modifications, including performance relief, to establish firm performance requirements for these parameters. The contractor shall propose requirement values for all parameters listed as “TBD”. The contractor shall review all parameters listed as "TBR" and propose requirement values as desired. The contractor shall quantify potential cost impacts of requirements changes by both absolute and relative cost impact measures. The contractor is encouraged to propose alternative approaches to defining the performance requirements or other requirements modifications at the Technical Interchange Meetings preceding the First Review to allow the government time to analyze the proposed requirement modifications and provide feedback at the First Review.

4.1.2 The contractor shall perform the following analyses and modeling and report on the results at the Final Review

4.1.2.1 The contractor shall develop and deliver an optical design model. This model shall comply with the WFIRST Math Models Guideline Document. It is the intention of the government to integrate this model with other models to create a complete model of the WFIRST Observatory.

4.1.2.2 The contractor shall develop and deliver optical performance (WFE, stray light, ghosting, transmission) budgets to the level needed to derive the WOMA subsystem and critical component driving requirements.

4.1.2.3 The contractor shall develop and deliver an optical performance validation plan.

4.1.2.4 The contractor shall develop and deliver a mechanical Computer Aided Design (CAD) model.

This model shall comply with the WFIRST Math Models Guideline Document. It is the intention of the government to integrate this model with other models to create a complete model of the WFIRST

Observatory.

4.1.2.5 The contractor shall develop and deliver a mechanical Finite Element Model (FEM). This model shall comply with the WFIRST Math Models Guideline Document. The fidelity of the model shall be appropriate for concept level (SRR) Structural, Thermal, Optical, Performance (STOP) and jitter integrated modeling, and shall be accompanied by an assessment of the model’s accuracy and the basis of estimate of the accuracy assessment. It is the intention of the government to integrate this model with other models to create a complete model of the WFIRST Observatory and perform STOP and jitter analysis.

4.1.2.6 The contractor shall develop and deliver a structural model validation plan.

4.1.2.7 The contractor shall develop a thermal model. This model shall comply with the WFIRST Math

Models Guideline Document. The fidelity of the model shall be appropriate for concept level (SRR)

Structural, Thermal, Optical, Performance (STOP) and jitter integrated modeling, and shall be accompanied by an assessment of the model’s accuracy and the basis of estimate of the accuracy assessment. It is the intention of the government to integrate this model with other models to create a complete model of the WFIRST Observatory and perform STOP and jitter analysis.

4.1.2.8 The contractor shall develop and deliver a thermal model validation plan.

4.1.2.9 Size, mass, and power study. The contractor shall explore and develop parametric relationships for the WOMA size, mass, and power trade space and evaluate the impacts of those parameters on

WOMA design, performance, risk, and implementation cost and schedule (both non-recurring and recurring). The contractor shall compare these findings to the size, mass, and power goals provided in the WOMARD, and recommend to the government where in the trade space WOMA preliminary design efforts should be concentrated during the subsequent preliminary design phase.

4.1.2.10 The contractor shall perform and deliver a preliminary reliability analysis to identify all single point failure, fault critical, and life limited elements. As part of this analysis the contractor shall describe the fault tolerant/graceful degradation features of the design.

4.1.2.11 The contractor shall develop and deliver a draft verification and test plan that addresses verification at both the WOMA level and the WFI I&T level. Plans for both the engineering model and flight models shall be addressed. Special emphasis should be given to the verification approach and

GSE to be used for optical alignment, verification and characterization, and mechanisms and other potential life limited items.

4.1.2.12 The contractor shall develop and deliver a requirements traceability tool or utilize an existing tool (flowing down to the subsystem or lower level) and use the tool to demonstrate that the WOMA concept design meets all requirements.

4.1.2.13 The contractor shall assess the technology readiness for WOMA implementation. The technology readiness goal is that all technologies shall attain Technology Readiness Level (TRL) 6 (i.e., system or sub-system prototype demonstrated in a relevant environment) or higher by the end of the formulation phase. The contractor shall define a plan to be carried out during the formulation phase to validate all technologies not deemed to be ready for the implementation phase. Any validation that requires demonstration during this Phase A Study, as opposed to during the preliminary design phase.

shall be highlighted in the proposal for this study. Any validation that is expected to continue into the implementation phase shall be clearly identified and justified, and the risks associated with delayed validation shall be addressed in the risk management plan.

4.1.2.14 The contractor shall conduct risk analyses and develop a risk management plan for the implementation phase. The contractor shall identify and assess risks to the development of the WOMA and final integration to the WFI level of assembly and then develop risk reduction approaches to mitigate them. The contractor shall investigate and apply as appropriate to the risk management plan lessons learned from previous instrument development efforts, both from the experience of the contractor and from other sources such as NASA’s lessons learned information system

(http://llis.nasa.gov/). Alternate implementation paths should be identified for all high-risk items. The plan shall be instituted as appropriate during the formulation phase, and any lessons learned during the formulation phase shall be entered into the NASA lessons learned information system.

4.1.2.15 The contractor shall develop and deliver an implementation phase schedule, in Microsoft

Project, for their WOMA design and integration and test of the WFI. The schedule shall be of sufficient fidelity to identify at least the five subsystems or components closest to the WOMA critical path. The contractor shall recommend a parts procurement strategy that addresses procurement of long-lead items

(i.e. Flight procurements required to begin in Phase B), their impact on the implementation schedule, and any associated risks with early procurement. The contractor shall identify earliest and latest possible need dates for all Government Furnished Equipment and delivery dates for WOMA simulators.

4.1.2.16 The contractor shall define the cost estimation techniques that will be used during formulation phase activities. The contractor shall perform and deliver time-phased cost analyses (i.e. cost profile by month as well as total life cycle cost) for development of the WOMA and integration and test of the

WFI. Costs shall be separately identified for required GSE, WFI-level integration and test, and expected launch and on-orbit checkout support. Appropriate cost analyses shall also be performed to support all other trade studies and analyses required during the study period. The cost analyses shall be reported using the following Work Breakdown Structure:

1.0 Management (including Fee)

2.0 Systems Engineering

3.0 Safety and Mission Assurance

4.0 WOMA Subsystems

4.1 Opto-Mechanics

4.1.1 WFI Cold Optical Bench Structure Assembly

4.1.2 F2 Mounted Optical Assembly

4.2 Structures

4.2.1 WFI Housing Enclosure Assembly (including radiator and truss)

4.3 Mechanisms

4.3.2 F2 Mechanism Assembly

4.3.3 Element Wheel (EW) Assembly

4.5 Electronics

4.5.1 Mechanism Control Electronics

4.5.2 Cold Sensing Module Harness

4.6 Thermal

4.6.1 Cryo-Cooler Thermal/Mechanical unit

4.6.2 Cryo-Cooler Electronics

4.7 Flight Software

5.0 Integration and Test

5.1 WOMA level Integration and Test

5.2 WFI level Integration and Test

5.3 Post WFI-delivery Support

4.1.2.17 The contractor shall define an integration and test flow that minimizes risk, cost, and schedule using contractor and/or GSFC facilities. Appropriateness and availability of GSFC facilities will be assessed through discussion with the WFIRST Integration and Test lead.

4.1.2.18 Additional trade studies as proposed by the study contractor.

5.0 Deliverables and Reporting

The contractor shall perform the reviews and reporting tasks and provide deliverable products as specified below. The Contracting Officer's written determination that Government requests for action

(RFA's) or requests for information (RFI's) regarding the deliverable reviews and products have been closed out will constitute acceptance of the deliverable.

5.1 Kick-off Meeting - to be held at the contractor's facility

This meeting, which is estimated to last one full day, will provide the contractor with the opportunity to receive clarification on the government provided requirements and supporting documentation. The kick-off meeting will be held approximate 2 weeks after Authorization to

Proceed (ATP) to allow the contractor's study team to familiarize themselves with the Applicable

Documents.

5.2 Technical Interchange Meetings

Weekly Technical Interchange Meetings (TIMs) shall be held during the Phase A Study. The

TIMs, which are estimated to last 1 hour each, are used to present on-going work and to discuss relevant technical and programmatic issues and findings. These TIMs will normally be held as teleconferences, but face-to-face meetings at the government and contractor may be conducted by mutual agreement.

5.3 First Review - to be held at the NASA Goddard Space Flight Center.

This review, which is estimated to last one full day, shall present the results of the WOMA trade studies and general analyses as required in Section 4.1.1. Suggested WOMA requirements changes shall be presented at the First Review. The initial WOMA concepts used as the basis for trade studies shall be presented. The status of all items identified in Section 5.5 shall also be addressed. The review package shall consist of viewgraphs with comprehensive notes. Additional material that is not presented at the First Review may be appended if the study contractor so desires. The First Review will be held approximately 2 months after ATP.

5.4 Second Review (Preliminary Cost and Schedule Review) - to be held at the contractor's facility

This review, which is estimated to last one full day, shall present the contractor's technical update since the First Review (1/2 day) and preliminary assessment of the cost estimate for the WOMA and schedule from Phase A Study ATP to WFI delivery to Payload Integration and Test (1/2 day).

The Second Review will be held approximately 4 months after ATP. The intention of this review is to provide the Government with sufficient information to support the Project Planning, Programming, Budgeting, and Execution (PPBE) and SRR cost and schedule product development. The contractor shall deliver preliminary versions of the following final deliverable products listed in Section 5.5:

Cost estimates for the baseline WOMA design and for design trades (by WBS, by month, in real year $)

WOMA development schedule from Phase A Study ATP to WFI delivery to Payload

Integration and Test (in Microsoft Project). The reported schedule shall explicitly show and justify all included margin.

5.5 Final Review (Study System Requirements Review, SSRR) - to be held at the contractor's facility

This review, which is estimated to last two full days, shall present the results of the WOMA analyses and modeling as required in Section 4.1.2. The review team will be comprised of

WFIRST Project personnel, possibly supported by additional subject matter experts. The Final

Review will be held approximately 2 weeks before study contract end (ATP + 6 months). Of specific interest is the status of all technology validation activities. All topics listed in Section 5.5 shall be addressed. In addition, the contractor shall deliver preliminary versions of the following final deliverable products listed in Section 5.5:

Optical design model

Mechanical design model

Structural finite element model

Thermal model

Size, mass, and power estimates

Master Equipment List

Subsystem and system-level performance analyses

Requirements compliance analysis and performance budgets and margins

Schedule estimates and long lead item procurement plan with GFE need dates

Risk assessment and risk management plan

Cost estimate updates where necessary to reflect final WOMA configuration (by WBS, by month, in real year $)

5.6 Action Item Review and Final Report Package

The Action Item Review will be the final event in the Phase A study and will be used to wrap up any action items or other issues remaining after the SSRR. The Action Item Review will be held at the NASA Goddard Space Flight Center. The Final Report Package shall be delivered as specified in the contract and shall consist of 1) the SSRR viewgraph package (updated as appropriate) with comprehensive facing page text added to describe the viewgraphs, and 2) a compilation of all deliverable products that document all work performed under the Phase A study contract. The package shall describe in detail the trade studies and analyses performed, the preliminary design, and the responses to any and all action items from the SSRR. The Final

Report Package shall include, but not be limited to, the following:

Results of the trade studies and general analyses

Requirements assessment and recommended changes

WOMA design concept and related analyses, including, but not limited to:

- Draft subsystem-level specifications

- Subsystem and system-level design concepts

- Subsystem and system-level performance analyses

- Requirements compliance analysis and performance budgets and margins

- Integration and test plans

- Reliability analyses

- Draft verification and test plan

- Optical design model

- Mechanical design model

- Structural finite element model

- Thermal model

- Size, mass, and power estimates

- Master Equipment List

- Subsystem and system-level performance analyses

- Additional design elements as proposed by the study contractor

Requirements traceability tool design description and requirements traceability report

Optical, mechanical, and thermal model accuracy assessments

Optical, mechanical, and thermal model validation plans

Technology readiness and availability assessment

Technology demonstrations and results, if applicable

Risk assessment and risk management plan

Schedule estimates and long lead item procurement plan with GFE need dates

Cost estimates for the baseline WOMA design and for design trades (by WBS, by month, in real year $)

Lessons learned during the formulation phase

Responses to SSRR action items

Vendor's acronym list