WFIRST_WFI-study-SOW-1608019.pdf

Wide Field Infrared Survey Telescope (WFIRST)

Project Office

Code 448

Wide Field Instrument (WFI) Industry Phase A Study Statement of Work (SOW)

August 19, 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

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

NASA/Goddard Space Flight Center (GSFC) intends to contract for up to two (2) Phase A studies to develop a design for the industry provided portion (detailed below) of the Wide Field Infrared Survey Telescope (WFIRST) Wide Field Instrument (WFI) based on the Government provided requirements in this Statement of Work and applicable documents. A hardware development, integration and test program, resulting in the delivery of a flight qualified WFI Opto-Mechanical Assembly (WOMA) will be developed under these study contracts. Integration of Government supplied hardware (detailed below) and a test approach that results in a flight qualified WFI will also be developed under these study contracts. Schedule and cost estimates will be developed as a part of these studies. 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 WFIRST 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 Sensing 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 some government furnished components and subsystems, is referred to as the WFI Opto-Mechanical Assembly (WOMA) and will be designed, built, aligned, and tested by a flight contractor and delivered to GSFC. The Government Furnished Equipment (GFE) that will be incorporated into the WOMA to make up the finished WFI is:

• Wide Field (WF) Focal Plane Assembly (FPA) and associated electronics

• Auxiliary Guider (AG) FPA and associated electronics

• Focal Plane Electronics (FPE) box and flight software

• Instrument Command and Data Handling (ICDH) box and flight software

• WFC filters and grism

• IFC and electronics (IFCE)

• Relative Calibration System, and electronics, (RCS and RCSE)

The distribution of WFI subsystems and components between the CSM and WEM and by WOMA and GFE is shown in the functional 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.

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.

WEM$

Labyrinth$Seal$

WFI$CSM$Structure$

RCS$

WF$FPA$

AG$FPA$

W

FI

$R ad ia to r$

Cr yo co ol er

MCE$

CC

E$

FPE$

ICDH$

Op@cal$fibers$

IFC$

IFC$FPA$

Filter$Select$ Mech$

GSM$

BLNK$

F1$ F2$

F5$ F6$

F3$ F4$

Therm$Cntrl$

Mount$Pt$

Mount$Pt$

M ount$Pt$

Key$ Op@cal$Path$ Electrical$ Cryocooler$ loop$

GFE$WOMA$

Op@cal$Telescope$Assembly$

Cold$

Baffle$

RCSE$

Fold$Mirror$ Mech$

Fold$Mirror$

Bl in d$ M at e$ Co nn ec to r$a nd $In te rm od ul e$ Ha rn es s$

Latch$

Latch$

Latch$

IFCE$

RI

P$

Guide$Rails$

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, Filter Section Mechanism mounted optical elements (filters and grism), IFC, ICDH, FPE, RCS/RCSE, Robotic Interface Plate (RIP), Guide Rails, 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 Fold Mirror Assembly (FMA), Filter Selection Mechanism (FSM) assembly (including the structure, 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-RQMT-05415 WFIRST Phase A Study Wide Field Instrument Opto-Mechanical Assembly

Requirements Document WFIRST-PLAN-05317 WFIRST Phase A Study Wide Field Instrument Verification and Validation

Plan WFIRST-IRD-05295 WFIRST Phase A Study WOMA-Wide Field FPA Interface Requirements

Document 2241220-07142016 WFIRST Phase A Study Spacecraft to Wide Field Instrument Opto-Mechanical

Assembly Mechanical Interface Control Drawing WFIRST-RQMT-05819 WFIRST Mission Assurance Requirements GSFC INST-EEE-002_add1 Instruction for EEE Parts Selection, Screening, Qualification, and Derating WFIRST-SPEC-05417 WFIRST Math Model Guidelines

2.2 Reference Documents

The following documents are for reference only.

WFIRST-OPS-04306 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 Mission and Wide Field Instrument (WFI), in particular, are Class B, per NPR

8705.4 Risk Classification for NASA Payloads.

SA-2. The WFIRST Observatory will be deployed into a Sun-Earth L2 Lagrange point orbit.

SA-3. The WFIRST Observatory will be designed to be serviced in-flight by a yet to be defined robotic servicing vehicle.

SA-4. The WFIRST Observatory will be launched on a heavy lift launch vehicle acquired by NASA.

SA-5. 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 WFI.

SA-6. The WFI will consist of an on-orbit replaceable Cold Sensing Module (CSM) mounted in the observatory Instrument Carrier and an on-orbit replaceable Warm Electronics Module (WEM) located in the spacecraft.

SA-7. 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-8. The spacecraft will provide all electrical harnesses and connectors between the WFI CSM and the WEM.

SA-9. The following power, command, telemetry, and control services will be provided to the WFI Opto-Mechanical Assembly (WOMA)

SA-9.1. 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-9.2. Primary and redundant survival heater power and switching from the spacecraft.

SA-9.3. Telemetry collection by the ICDH.

SA-9.4. Spacecraft collection of health and safety telemetry that is not collected by the ICDH

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

SA-9.5. Commanding of WOMA mechanisms (e.g. FMA, FSM) and thermal set points (e.g.

thermal control zones and cryocooler heat exchanger) SA-10. For this Phase A study it should be assumed that no WOMA FSW will be hosted in the GFE electronics (i.e. FPE, ICDH, RCSE, IFCE, spacecraft CDH). This approach may be revisited in Phase B but is being adopted here to simplify interfaces. Impacts of this assumptions should be highlighted.

SA-11. GSFC will furnish the optical prescription for the WFIRST Optical Telescope Assembly (OTA) and WFI filters and grism.

SA-12. 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-12.1. WFI focal plane assemblies (WF FPA, AG FPA, and IFC FPA) and the electronics and FSW (FPE and ICDH) that control, read, and process science and guide star data from the WFI FPAs.

SA-12.2. Optical elements for the Filter Selection Mechanism (bandpass filters and grism).

SA-12.3. WFI blind mate electrical connector mechanisms.

SA-12.4. Robotic interface plate for the active latch mechanism (A latch).

SA-12.5. Servicing Guide Rails.

SA-12.6. 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-12.7. RCS and the electronics (and FSW, if any) that control the RCS. This includes any mechanisms contained in the RCS.

SA-12.8. WEM with WEM-to-SC blind mate connector.

SA-13. During Phase A GSFC will engage the cryocooler developer, under separate contract, in early development work on the cryocooler system. Specifically, systems engineering and design work sufficient to conduct a SRR and PDR of an Engineering Model cryocooler system (turbo machinery and electronics), trade studies on potential vibration reduction approaches, and procurement of long-lead parts for the EM system will be initiated.

SA-14. GSFC will provide the following Ground Support Equipment (GSE) for use in WOMA and/or WFI-level development, integration, and test:

SA-14.1. WFI Test Set and associated cables to electrically interface with the ICDH. This is a simulator of the ground system and spacecraft that performs:

Power supply to the ICDH 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-14.2. A simulator of the ICDH that performs:

Collection of ICDH collected telemetry Transmission of commands to WOMA MCE and thermal control systems (e.g.

operational heaters) Transmission of commands to CryoCooler Electronics (CCE) Transmission of commands to IFCE (in case flight IFC is integrated before flight

ICDH)

Transmission of commands to RCSE (in case flight RCS is integrated before flight

ICDH)

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

ICDH)

SA-14.3. 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-14.4. 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-14.5. A surrogate of the Inter-Module Harness for connecting the CSM and WEM during WFI-level testing.

SA-14.6. Data analysis workstations required for WFI-level verification and calibration.

SA-14.7. Optical stimulus that accurately represents the optical beams to the WFC and IFC focal planes from the WFIRST OTA. This GSE will be compatible with warm and cold testing of the WFI and will be designed by GSFC in collaboration with the WOMA contractor to be compatible with the facilities that are planned to be used to test WFI (e.g. whether the optical stimulus will be inside or outside of a vacuum chamber).

SA-14.8. IFC mechanical simulator that accurately represents the volume, mass properties, mechanical interfaces, and optical alignment features of the IFC.

SA-14.9. RCS mechanical simulator that accurately represents the volume, mass properties, and mechanical interfaces of the RCS.

SA-14.10. A surrogate of the OTA side of the WFI Labyrinth Seal.

SA-15. GSFC will design, build, test, and qualify the WFI serviceable latches and install them during Payload I&T. This assumption is open for discussion and trade during this study.

SA-16. 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-17. The WOMA electronics (and FSW, if any) are responsible for:

SA-17.1. Control of any operational heaters (e.g. on the Optical Bench) SA-17.2. Control of the cryocooler (i.e. ICDH commands a temperature set point and the cryocooler electronics and FSW performs the control) SA-17.3. Control of all mechanisms (FMA and FSM)

SA-18. 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-19. The contractor will integrate the GSFC provided FPAs, filters, grism, RCS, IFC, FPE, ICDH, and blind mate electrical connector with GSFC support.

SA-20. GSFC will be responsible for verifying the performance of and flight qualification of the integrated WFI prior to delivery to Payload I&T, per the WFIRST Phase A Study Wide Field Instrument Verification and Validation Plan.

SA-21. The contractor will conduct the testing of the integrated WFI prior to delivery to Payload I&T, with GSFC support, per the WFIRST Phase A Study Wide Field Instrument Verification and Validation Plan.

SA-22. 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-23. 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-24. Contractor WOMA personnel will support the WFI calibration, and payload and spacecraft integration activities at GSFC.

SA-25. In addition to the flight WOMA, the contractor will deliver the following GSE:

SA-25.1. WOMA Electrical Simulator to support WFI ICDH and spacecraft CDH development.

The WOMA electrical simulator will simulate all commandable components (e.g. MCE and relays), sensors (e.g. temperature) and loads (e.g. heaters) included in the contractor's deliverable.

SA-25.2. Alignment tools for the WF FPA, AG FPA, and IFC

SA-25.3. WFI Lifting Fixture SA-25.4. WFI Support Stand

SA-25.5. WFI Rotation Fixture SA-25.6. WFI Transport Cart

SA-25.7. WFI Shipping Container SA-25.8. WFI Purge Tent

SA-26. All other required GSE not explicitly listed in these assumptions will be identified and provided by the contractor.

SA-27. Notional schedule for planning purposes:

SA-27.1. Flight hardware phase (under separate procurement) award at beginning of FY2018.

SA-27.2. WF FPA, AG FPA, IFC, filters, grism, FPE, ICDH, WEM, CSM blind mate connector ready to integrate into WOMA by January 2021.

SA-27.3. 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-27.4. Planned launch NET August 2024.

SA-27.5. 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 FMA 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 and sparing 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 FMA Mounted Optical Assembly

4.2 Structures

4.2.1 WFI Housing Enclosure Assembly (including radiator and truss)

4.3 Mechanisms

4.3.2 FMA Mechanism Assembly

4.3.3 FSM Mechanism 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 After Contract Award (ACA) 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 5.6 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 ACA.

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 ACA to WFI delivery to Payload Integration and Test (1/2 day). The Second Review will be held approximately 4 months after ACA. 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 5.6:

• 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 ACA 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 (ACA + 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 5.6:

• 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, 2 weeks after the SSRR, 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