ATTACHMENT_A_-_SOW.pdf

Effective Date: November 15, 2018

Expiration Date: November 15, 2023

Check https://ipdtdms.gsfc.nasa.gov to verify that this is the correct version prior to use

400-FORM-0002 (4/16/2014)

PACE- PWR-SOW-0025 Revision –

Plankton, Aerosol, Cloud, ocean Ecosystem (PACE), Code 427

PACE Solar Array Panels Statement of

Work

National Aeronautics and

Space Administration

Goddard Space Flight Center

Greenbelt, Maryland

GSFC PACE CMO

11/15/2018

Released https://ipdtdms.gsfc.nasa.gov/

PACE Spacecraft Component SOW PACE-PWR-SOW-0025, Revision -ii

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400-FORM-0002 (4/16/2014)

Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) Mission Solar

Array Panels Statement of Work Signature/Approval Page

Prepared By:

John Lyons

Reviewed By:

John Blackwood

Gary Davis

Bill Sluder

Beth Weinstein

Jack Sanders

Gary Won

Trevin Dear

Melyane Ortiz-acosta

George Bertholdt

Jaime Eitnier

Craig Stevens

Dan Powers

Dave Sohl

Approved By:

Andre’ Dress

Electronic Signatures available online at: https://ipdtdms.gsfc.nasa.gov/ iii

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Preface

This document is under Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) Mission configuration control. Changes to this document require prior approval of the PACE

Configuration Control Board (CCB) Chairperson or designee. Proposed changes shall be submitted to the PACE Configuration Management Office (CMO), along with supportive material justifying the proposed change. Changes to this document will be made by complete revision.

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Change History Log

Revision Effective

Date

Description of Changes

(Reference the CCR & CCB/ERB Approval Date)

Revision - 11/15/2018 Baseline Release following the approval of PACE-CCR-0359 v

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Table of TBDs/TBRs/TBSs

Action Item

No.

Location Summary Individual/

Organization

Actionee vi

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Table of Contents

1.0 Introduction

1.1 General Information

1.2 Scope

2.0 Applicable Documents

3.0 Management, Reporting, Reviews, and documentation

3.1 Program management

3.2 Reporting

3.2.1 Biweekly Telecon

3.2.2 Bimonthly Status Report

3.3 Advanced Notifications

3.4 Reviews And Meetings

3.4.1 Kick-off Meeting

3.4.2 Design Conformance Review (DCR)

3.4.3 Pre-Environmental Review (PER)

3.4.4 Pre-Ship Review (PSR)

3.4.5 Technical Interchange Meetings (TIM)

3.4.6 Manufacturing Readiness Review (MRR)

3.5 Documentation

3.6 NASA/GSFC Furnished Data, Equipment, And Facilities

3.6.1 Insulated Substrates

3.6.2 Connectors

3.6.3 Witness Foils

3.6.4 Coarse Sun Sensor (CSS) Wire

4.0 Design And Analysis

4.1 Interface Control Documentation

4.2 Drawing Package

4.3 Computer Models

4.4 NA

4.5 NA

4.6 Thermal Analysis DATA

4.7 NA

4.8 Worst Case Circuit Analysis Report

4.9 Parts Stress Analysis Report

4.10 Radiation Hardness Analysis Report

4.11 Reliability Analysis Report

4.12 Failure Modes And Effects Criticality Analysis Report

4.13 NA

4.14 NA

4.15 NA

4.16 Electrical Output Predictions

4.17 Mass Analysis

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4.18 Magnetic Field Report

5.0 Hardware Procurement/Manufacturing

5.1 General Requirements

5.2 Solar Array Panels

5.3 Connector Savers

5.4 Supporting Hardware

5.4.1 Mating Connectors, Test Harnesses, and Connectors for Breakout Boxes

5.4.2 Connector Caps

5.4.3 Witness Foils

5.5 NA

5.6 Sample CICs

5.7 Diode Boards

5.8 Repair Parts

6.0 Performance Verification and Test

6.1 NA

6.2 NA

6.3 Qualification Coupons Test Plan

6.4 Flight Solar Array Panels Test Plan

6.5 Qualification coupons Test Procedures

6.6 Flight Solar Array Panels Test Procedures

6.7 Solar Cell Qualification Test Reports

6.8 Solar Panel Qualification Coupons Test Reports

6.9 Flight Solar Array Panels Thermal Vacuum Test Reports

7.0 Quality Assurance

7.1 General Requirements

7.1.1 Quality Assurance Plan/Manual

7.1.2 Surveillance of the Contractor

7.1.3 Anomaly Reporting

7.1.4 Configuration Management

7.1.5 Ground Support Equipment Interfaces

7.2 System Safety Requirements

7.3 Reliability Requirements

7.3.1 Stability Trending

7.3.2 Limited-Life Items

7.3.3 Control of Sub-Contractors and Suppliers

7.4 NA

7.5 Design Verification Requirements

7.5.1 Verification Requirements

7.5.2 Analysis, Trending, and Reporting of Test Data

7.5.3 NA

7.6 Workmanship Standards And Processes

7.6.1 General

7.6.2 New or Advanced Packaging Technologies

7.6.3 Workmanship: Use of Alternate Workmanship Standards

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7.6.4 Electrostatic Discharge Control Requirements

7.6.5 Training and Certification of Contractor Personnel

7.6.6 Hardware Handling, Cleaning and Packaging

7.6.7 Splices, Circuit Board Trace Cuts, and Jumper Wires

7.6.8 NA

7.6.9 Use of Water Soluble Flux

7.6.10 Lead-Free and Tin Whisker Control Measures

7.7 EEE Parts Requirements

7.7.1 General

7.7.2 Plastic Encapsulated Microcircuits (PEMs)

7.7.3 Radiation Hardness

7.7.4 Parts Age Control

7.7.5 GIDEP Alerts and Problem Advisories

7.7.6 Reuse of Parts and Materials

7.7.7 Part Notification of Failure

7.7.8 NA

7.8 Materials, Processes Requirements

7.8.1 Materials and Processes Control

7.8.2 Commercial-Off-The-Shelf (COTS), Vendor-Designed and Fabricated, and

Bilateral Agreement Furnished Hardware

7.8.3 M&P Usage Documentation

7.8.4 Materials Usage Agreements (MUAs)

7.8.5 Detailed Requirements

7.8.5.1 Flammability Control (NASA-STD-6016 Section 4.2.1.1)

7.8.5.2 Toxic Offgassing (NASA-STD-6016 Section 4.2.1.2)

7.8.5.3 Fluid Compatibility (NASA-STD-6016 Section 4.2.1.3)

7.8.5.4 Oxygen Compatibility (NASA-STD-6016 Section 4.2.1.4)

7.8.5.5 Electrical Wire Insulation Materials (NASA-STD-6016 Section 4.2.1.5)

7.8.5.6 Titanium (NASA-STD-6016 Section 4.2.2.3)

7.8.5.7 Tin (NASA-STD-6016 Section 4.2.2.11)

7.8.5.8 Polyvinylchloride (NASA-STD-6016 Section 4.2.3.2)

7.8.5.9 Composite Materials (NASA-STD-6016 Section 4.2.3.3)

7.8.5.10 Limited-Life Items (NASA-STD-6016 Section 4.2.3.5)

7.8.5.11 Thermal Vacuum Stability(NASA-STD-6016 Section 4.2.3.6)

7.8.5.12 External Environment Survivability (NASA-STD-6016 Section 4.2.3.7)

7.8.5.13 Glycols (NASA-STD-6016 Section 4.2.3.9)

7.8.5.14 Adhesive Bonding (NASA-STD-6016 Section 4.2.4.3)

7.8.5.15 Nondestructive Evaluation (NDE) Plan (NASA-STD-6016 Section 4.2.5.1)

7.8.5.16 Sandwich Assemblies (NASA-STD-6016 Section 4.2.6.2)

7.8.5.17 Fastener Installation (NASA-STD-6016 Section 4.2.6.5)

7.8.5.18 Contamination Control (NASA-STD-6016 Section 4.2.6.6)

7.8.5.19 Packaging (NASA-STD-6016 Section 4.2.6.7)

7.8.5.20 Shelf-Life Items

7.8.5.21 Printed Wiring Boards (PWBs)

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7.8.5.22 Solder Flux

7.8.5.23 Fasteners with LL Longitudinal Locking Elements

7.8.5.24 Gold-Indium Intermetallic

7.8.6 Materials Procurement Requirements

7.9 Contamination Control Requirements

7.9.1 Contamination Control Plan

7.9.2 Surface Cleanliness

7.9.3 Material Outgassing

7.9.4 Thermal Vacuum Bakeouts

7.9.5 Wiping and Cleaning Materials

7.9.6 Gloves and Finger Cots

7.9.7 Room Cleanliness

7.9.8 Assembly Room Temperature

7.9.9 Assembly Room Humidity

7.10 METROLOGY

7.10.1 General

7.10.2 Use of Calibrated and Non-calibrated Instruments

8.0 Handling, Storage, Packaging, Preservation, and Delivery

Appendix A. Abbreviations and Acronyms

APPENDIX B. GSFC PCB SUBMITTAL AND MATERIAL SELECTION FORMS

APPENDIX C. LIST OF APPLICABLE DOCUMENTS

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List of Tables

Table Page

Table 4-1 FMEA Severity Categories

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1.0 INTRODUCTION

1.1 GENERAL INFORMATION

The Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission is a strategic climate continuity mission that was defined in the 2010 document Responding to the Challenge of Climate and

Environmental Change: NASA’s Plan for Climate-Centric Architecture for Earth Observations and Applications from Space (referred to as the “Climate Initiative”). The Climate Initiative complements NASA’s implementation of the National Research Council’s Decadal Survey of

Earth Science at NASA, NOAA, and USGS, entitled Earth Science and Applications from

Space: National Imperatives for the Next Decade and Beyond.

PACE will extend the high quality ocean ecological, ocean biogeochemical, cloud, and aerosol particle data records begun by NASA in the 1990s, building on the heritage of the Sea-Viewing

Wide Field-of-View Sensor (SeaWiFS), the Moderate Resolution Imaging Spectroradiometer

(MODIS), the Multi-angle Imaging SpectroRadiometer (MISR), and the Visible Infrared

Imaging Radiometer Suite (VIIRS). The mission will be capable of collecting radiometric and polarimetric measurements of the ocean and atmosphere, from which these biological, biogeochemical, and physical properties will be determined. PACE data products will not only add to existing critical climate and Earth system records, but also answer new and emerging advanced science questions related to Earth’s changing climate.

PACE is classified as a Category 2 mission, per the criteria in NASA Procedural Requirement

(NPR) 7120.5E, NASA Space Flight Program and Project Management Requirements. The mission classification is C according to NPR 8705.4B, Risk Classification for NASA Payloads.

The PACE observatory is comprised of three instruments, an Ocean Color Instrument (OCI) and two Polarimeters (HARP2 and SPEXOne). The OCI is the primary instrument on the observatory and is being developed at GSFC. The OCI is a hyper-spectral scanning (HSS) radiometer designed to measure spectral radiances from the ultraviolet to shortwave infrared

(SWIR) to enable advanced ocean color and heritage cloud and aerosol particle science. The

Polarimeters are second instruments on the PACE observatory, developed outside of GSFC.

Both Polarimeters are multi-band, multi-angle polarimeters planned to measure spectral polarized and unpolarized radiances to enable advanced cloud and aerosol particle science, as well as improved atmospheric correction for ocean color activities. This three-instrument PACE mission has the following multiple scientific goals:

Extending key systematic ocean biological, ecological, and biogeochemical climate data records and cloud and aerosol climate data records;

Making global measurements of ocean color data products that are essential for understanding the global carbon cycle and ocean ecosystem responses to a changing climate;

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400-FORM-0002 (4/16/2014)

Collecting global observations of aerosol and cloud properties, focusing on reducing the largest uncertainties in climate and radiative forcing models of the Earth system; and, Improving our understanding of how aerosols influence ocean ecosystems and biogeochemical cycles and how ocean biological and photochemical processes affect the atmosphere.

The PACE satellite is planned for a launch in 2022-2023. The PACE project office at the NASA

Goddard Space Flight Center (GSFC) is responsible for the satellite development, launch and operations. The mission is planned for launch into a Sun synchronous polar orbit at 676.5 km with an inclination of 98° and a 1 pm local ascending node crossing time. The spacecraft bus will host the OCI, HARP2, and SPEXOne instruments. The GSFC PACE Project office will oversee the mission and the development of the satellite, launch vehicle, mission operations control center, and operations. The Headquarters Program Science will separately fund the science data processing system and competed science teams, which will include field-based vicarious calibration and data product validation efforts to support the Project science team.

NASA Headquarters has directed the mission development to be guided by a Design-to-Cost

(DTC) process. All elements of the mission, other than the cost, are in the DTC trade space. At the heart of the DTC process are the mission studies, performed across all the mission elements.

The mission studies will be used to define appropriate approaches within and across elements while maximizing science capabilities at a high cost confidence. Mission baseline requirements development is also embedded within the DTC process, as these requirements were not established at the onset of the mission concept development. Baseline mission requirements will be a product of the mission studies and will be defined by the project office as part of the DTC process.

The PACE mission consists of four major segments: space segment (SS), ground segment (GS), science data segment (SDS), and the launch segment (LS).

The space segment consists of the spacecraft bus, the OCI, and the two Polarimeters .

The spacecraft and OCI are being developed and integrated at GSFC. The Polarimeters are planned to be procured outside of GSFC. The spacecraft and instruments will be integrated as the PACE observatory at GSFC.

The GS and associated Mission Operations Center (MOC) will be developed, integrated, and operated at GSFC. The GS provides for the command and control and health and safety monitoring of the PACE observatory on-orbit, as well as ensuring the science data are accounted for and delivered to the SDS. The MOC will contain the flight operations team (FOT) and is being managed by the PACE project through observatory commissioning. After commissioning, the FOT will be managed by the GSFC Earth

Science Mission Operations (ESMO) office. The MOC performs all real time operations and off-line operations functions, including planning and scheduling, orbit and attitude

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analysis, housekeeping telemetry data processing, monitoring/managing the spacecraft and instruments, first line health/safety for the instruments, and housekeeping archiving and analysis.

The SDS will be located at GSFC, but managed (separately from the project) by the

NASA Headquarters Earth Sciences Division. The SDS will ingest, apply calibration and science algorithms, and process the science data, provide science software development and algorithm integration, act as the science data interface to the science team, and deliver of all science data products to the NASA-assigned Distributed Active Archive

Center (DAAC).

The LS is planned for a launch vehicle to be selected and procured by the NASA Launch

Services Program at Kennedy Space Center (KSC).

In addition to utilizing GSFC institutional capabilities, the project will utilize the NASA/GSFC institutional capabilities such as the Flight Dynamics Facility (FDF), Near Earth Network

(NEN), Ocean Biology Processing Group (OBPG), Space Network (SN), and NASA Integrated

Services Network (NISN). PACE plans to generate 3.5 Terabits of science data daily. The data are downlinked from the observatory during 12-14 daily contacts via Ka-band communications to the NEN's ground stations. The observatory will also receive ground commands and transmit real-time housekeeping telemetry via a S-band 2-way link through the NEN during nominal operations. The observatory also has the capability of receiving ground commands and transmitting real-time housekeeping telemetry, via S-Band, through the SN during critical or contingency operations.

This document defines the work to be performed by the Contractor in the design, development, fabrication, and delivery of the PACE Solar Array Panels.

1.2 SCOPE

The contractor shall provide the facilities, personnel, services, tools, equipment, and materials necessary to design, analyze, manufacture, test, and deliver the hardware and data in accordance with the requirements of this SOW and the documents referenced herein.

This SOW defines the contractor tasks, deliverables, responsibilities, and schedule, either within this document or by reference.

More details for the deliverables and the schedule can be found in the RFP/contract Section B.

In this document, specific deliverables from that table are referenced with “(DIL

#row_number).”

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2.0 APPLICABLE DOCUMENTS

All applicable and reference documentation identified in this document shall apply in the situations where they are specifically referenced. In the event of a conflict between the SOW and the specification, the SOW shall take precedence. See Appendix C for applicable documents.

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3.0 MANAGEMENT, REPORTING, REVIEWS, AND DOCUMENTATION

3.1 PROGRAM MANAGEMENT

The contractor shall designate a single individual who will be given full responsibility and authority to manage and administer all phases of the work specified by the contract and ensure that all objectives are accomplished within schedule and cost constraints.

The contractor shall designate and identify by name a single individual who shall serve as a point of contact with the NASA/GSFC Contracting Officer’s Representative (COR) for all technical aspects of the Solar Array Panels contract.

The contractor shall establish and apply a program control system for managing all resources, controlling schedules, managing all engineering, manufacturing and procurement activities, configuration management, Quality Assurance, documentation control, and distribution.

3.2 REPORTING

The Contractor shall prepare and present to the NASA/GSFC COR biweekly status reports via telecon and a bimonthly written report (DIL #2).

3.2.1 Biweekly Telecon

The Contractor shall prepare and present to the NASA/GSFC COR a status report via biweekly

(every other week) telecon. This shall include, but shall not be limited to a review of the previous week’s: accomplishments and progress against the original schedule; procurements; key personnel changes; completed designs, drawings, and documents; material and process changes;

test and inspection results; performance assurance issues; requirements verification changes;

hardware shipments; action or open items; problems; and the next week’s planned activities.

3.2.2 Bimonthly Status Report

The Contractor shall prepare and submit to the NASA/GSFC COR a written Bimonthly Status

Report in a PDF file to e-mail addresses supplied at contract award. The report shall include the same information reported in the weekly telecons but for the previous month rather than the previous week. In addition the report shall include the next month’s planned activities, and updates to the schedule or a statement that the Contractor is on the last schedule submitted.

The Contractor shall provide, as part of the monthly report, a list of all open anomaly and failure reports and a separate list of the anomaly and failure reports closed during the month. For each reported anomaly, nonconformance and failure, there shall be a report that documents the investigation and engineering analysis needed to determine the cause and corrective actions to disposition the nonconformance.

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3.3 ADVANCED NOTIFICATIONS

The contractor shall notify the NASA/GSFC COR at least seven (7) calendar days in advance of all mandatory hardware inspections, test activities, TIM’s, and deliveries at either the contractor’s or a sub-contractor’s facility to allow timely participation by the NASA/GSFC

Quality Assurance representative. (DIL #4) Event specific notification requirements (such as failures, anomalies, etc.) are included in the appropriate sections.

3.4 REVIEWS AND MEETINGS

3.4.1 Kick-off Meeting

The Contractor shall organize and hold a Kick-off Meeting at the Contractor’s facility prior to any activity identified in this SOW (DIL #5).

The Contractor shall provide to the NASA/GSFC COR a Kick-off Presentation Package and all other required deliverables (DIL #6). The Kick-off Meeting shall address program management and quality assurance activities outlined in this SOW, as well as the performance and environmental requirements outlined in the Solar Array Panels specification in sufficient detail to demonstrate understanding of contract requirements. At a minimum, the presentation package should cover the following areas:

Program Management

Quality Assurance

Solar Array Panels Design Description

Preliminary Interface Control Documents

Flight Heritage

Facilities

Qualification Verification Plan and Procedure

3.4.2 Design Conformance Review (DCR)

The contractor shall organize and present a Design Conformance Review to a NASA/GSFC Review

Team at the contractor’s facility prior to the manufacturing program. (DIL #7) The Design

Conformance Review shall address all program management, design, drawings, analysis, manufacturing, test, and quality assurance activities outlined in this SOW and the PACE Project

Solar Array Panels Specification, PACE-PWR-SPEC-0062, in sufficient detail to ensure that the proposed design conforms to all requirements and is ready for fabrication to begin.

The contractor shall provide to the NASA/GSFC COR a Design Conformance Review Presentation

Package and all other required deliverable data prior to the review. (DIL #8) At a minimum, the design package should cover the following areas:

Agenda

Program Management

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Quality Assurance

Electrical, Mechanical, and Environmental specifications

Parts, including stress analysis and radiation hardness assessment

Drawing Package

Fabrication, Assembly, and Inspection Flow plan, a step-by-step procedure that describes the method of fabrication, assembly, and inspection from piece parts to the completely assembled Solar Array Panels

Facilities

Qualification Coupons Test Plan

Preliminary Flight Panels Test Plan

Materials and Processes

Solar Cell Qualification Report

Contamination Control (for items sensitive to contamination or with explicit surface cleanliness or outgassing requirements)

Mechanical/Structural analyses

Electrical Worst-Case analyses

Failure Modes Effects Criticality Analysis

Flight Heritage

Verification Matrix (per Section 7.5.1)

Preliminary Mass Analysis

Review minutes shall be prepared and, as a minimum, shall include attendance, action items, action item accomplishment responsibility and agreements. All items shall be in sufficient detail to be self-explanatory. A Design Conformance Review Report shall be prepared following the review and, as a minimum, contain meeting notice, agenda, review meeting minutes described above and responses to all recommendations and action items. (DIL #9)

3.4.3 Pre-Environmental Review (PER)

The contractor shall organize and conduct a Pre-Environmental Review (PER) at the contractor’s facility before the environment test program begins. (DIL #10) This presentation shall demonstrate overall conformance of the requirements specified in the PACE Project Solar Array Panels

Specification PACE-PWR-SPEC-0062 and this Statement of Work for this phase of the procurement.

This presentation shall cover programmatic (e.g., schedule), technical, test and verification, and quality assurance topics, and address any changes made to the Verification Matrix since DCR. (DIL

#11) This review shall also provide an opportunity to review test plans and procedures and all analyses required to approve the testing of the hardware. This review will summarize results from the qualification coupon tests.

3.4.4 Pre-Ship Review (PSR)

The contractor shall hold a Pre-Ship Review at the contractor's facility at the completion of verification tests and prior to the shipment of each hardware item to NASA/GSFC. (DIL #12)

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This presentation shall demonstrate completion of all activities required for delivery of any hardware deliverable item to NASA/GSFC, and note any activities that are incomplete. In particular, the contractor shall present the completed verification matrix that shows verification of all requirements and presents actual data (results of tests or analyses) where applicable. (DIL

#13) Any requirements that are not met shall be identified in the Deviations/Waivers etc. list and discussed with NASA/GSFC during the review.

An End Item Data Package (EIDP) shall be made available for review during pre-ship reviews for each of the different hardware deliverables. (DIL #14) This package shall also be delivered with each end item with the level of detail required of that item. The package should be comprised of, but not limited to, the following data:

The deliverable Solar Array Panels, serial number, part number, and classification status

(e.g., flight, non-flight, ground support).

Appropriate approval signatures (e.g., contractor’s quality representative, product design lead, government Representative)

Work orders for the final assembly and associated tests

As-Built vs. As Designed Parts List, (EEE parts, includes serialization/revisions)

As-Built Final Drawing Package (including rework instructions, if any)

Problem/anomaly reporting (complete copies of report)

Deviations/Waivers/shortages/open items/non-conformances and their dispositions, with supporting rationale

Status of all action items from previous reviews

Class I MRBs (complete copies of reports)

List of As-Built Materials and Processes used

Achieved surface cleanliness and outgassing rate data (when applicable)

Log of total operating time and failure-free operation

List and status of all identified Life-Limited Items

Trended Critical Parameters Data (when applicable)

Verification matrix (including environmental), test data and reports

Photograph Documentation (Pre and Post conformal coating, Pre-Closure and Closed)

Certificate of Conformance, with management signature

End Item Inspection Report

As-Built Configuration List

Mate/Demate log

Printed circuit board coupon results

Storage and Transportation Plans and Requirements

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3.4.4.1 Final Mass Properties Measurement

The Contractor shall update the mass estimate for each solar array panel to reflect measured values and include the update in the End Item Data Package (DIL #14).

3.4.4.2 End Item Data Package (EIDP)

The contractor shall prepare and deliver a data delivery package to the GSFC with the flight panels. (DIL #14) For each panel, this report shall contain the as built configuration list, a list of parts and materials used in the panel, a list of processes used to manufacture the panel, a test log book for each test which documents the total operating time and cycles for each test, a list of open items and the reason the items are open, results of the verifications required by this specification including dates of completion and what test equipment was used, TQCM data, a summary of all repairs for that flight panel, a series of digital color photographs of each side

(back and front) of that flight panel, a copy of all Material Review Board (MRB) actions generated against the panel, and a copy of all problem/failure reports generated against the panel.

The Contractor shall document the issue numbers of the drawings and specifications to which particular hardware has been fabricated, inspected, and tested as the as-built configuration. The

Contractor shall provide evidence of compliance with the as-built documentation as a basis for acceptance of the hardware.

3.4.5 Technical Interchange Meetings (TIM)

The contractor shall plan for and facilitate up to three (3) informal, face-to-face technical interchange meetings to be held at the contractor facilities. (DIL #15) These TIMs shall support review and coordination of technical issues including, but not limited to, parts, test plans, test procedures, software changes, design modifications, and design analyses.

3.4.6 Manufacturing Readiness Review (MRR)

The Contractor shall organize and present a Manufacturing Readiness Review to a NASA/GSFC

Review Team at the Contractor’s facility or by telecon at NASA/GSFC’s discretion. (DIL #66) This review shall demonstrate the success of the qualification coupons, their tests, and the manufacturer’s readiness to begin fabrication of the flight panels. This review shall cover programmatic, technical, test and verification, and quality assurance topics, and address any changes made to the Verification

Matrix since DCR. This review shall also provide an opportunity to review drawings and analyses required for approval before the start of fabrication.

The contractor shall provide a MRR Presentation Package. (DIL #67) This shall address qualification coupon performance in environmental tests and manufacturing readiness in sufficient detail to ensure that the proposed build conforms to all requirements and is ready for fabrication to begin. The design package shall include the following:

Agenda

Qualification Coupon Test Report

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Updated Mass Analysis

Readiness for Flight Panel Manufacturing

Manufacturing Flow with Inspection Points

Updated Schedule

The contractor shall supply an updated schedule that shall include milestone charts depicting critical paths and indicating critical dates in the program. The Contractor shall define the start, implementation, and completion dates for the detailed activities associated with the design, analysis, manufacturing, and testing of all components, subassemblies, and panels. The

Contractor shall identify the vendor lead times for procured parts and materials.

3.5 DOCUMENTATION

In addition to that documentation specifically called for in the contract, upon request by the

NASA/GSFC COR, the contractor shall make available a copy of any document or data generated during this contract performance for review by GSFC at either the contractor's facility or via the internet. This includes, but is not limited to, technical reports and memorandums, drawings, schematics, studies, analyses, parts and materials data, test data, alerts, etc.

3.6 NASA/GSFC FURNISHED DATA, EQUIPMENT, AND FACILITIES

NASA/GSFC shall furnish the following list of data, equipment, and facilities to the contractor.

If there are additional items that the contractor believes are necessary in order to fulfill this contract, they shall be stated in the response to this procurement.

3.6.1 Insulated Substrates

NASA/GSFC will provide qualification coupon and flight panel insulated substrates in accordance with the Contract Schedule that the contractor shall populate in accordance with the

PACE Solar Array Panels Specification, PACE-PWR-SPEC-0062.

Unpopulated, Insulated Qualification Coupon Substrate(s), Quantity of 4

Unpopulated, Insulated Flight Solar Array Panel Substrate(s), Quantity of 3

3.6.2 Connectors

NASA/GSFC will provide qualification coupon and flight panel connectors in accordance with the Contract Schedule that the contractor shall install in accordance with the PACE Solar Array

Panels Specification, PACE-PWR-SPEC-0062.

Connectors for Qualification Coupons, Quantity of 8

Connectors for Flight Panels, Quantity of 25

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3.6.3 Witness Foils

NASA/GSFC will provide witness foils (3 or more as required) that the contractor shall keep with each panel at all times to monitor the panel environment in accordance with the PACE Solar

Array Panels Specification, PACE-PWR-SPEC-0062.

3.6.4 Coarse Sun Sensor (CSS) Wire

NASA/GSFC will provide twisted, shielded wire (3 or more as required) for the Coarse Sun

Sensors (CSSs) that the contractor shall install on the panels in accordance with the PACE Solar

Array Panels Specification, PACE-PWR-SPEC-0062.

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4.0 DESIGN AND ANALYSIS

The contractor shall perform analyses of the technical and environmental requirements specified in the PACE Project Solar Array Specification (PACE-PWR-SPEC-0062) to ensure compliance of the hardware fabrication and to assemble the documentation necessary to ensure its usability by NASA/GSFC users.

4.1 INTERFACE CONTROL DOCUMENTATION

NASA/GSFC will provide document(s) and/or drawing(s) that define, in detail, all electrical, thermal, and mechanical interfaces.

4.2 DRAWING PACKAGE

The contractor shall supply a drawing package for the flight panels and the qualification coupons consisting of: assembly drawings, drawings of all contractor-installed hardware, and wiring diagrams. The package shall specify the location of wire feed through holes for the solar cell circuits and their diameter for the qualification coupons and flight panels. The drawing format will be agreed upon between the Contractor and NASA/GSFC. NASA/GSFC will use this information to determine the center of mass location and other mass properties.

The contractor shall provide a drawing package that includes, but is not limited to: (DIL #17)

ELECTRICAL: assembly and interface drawings (board level schematics available on request)

MECHANICAL: assembly and interface drawings

THERMAL: qualification coupon and flight panel paint stay-out drawings

4.3 COMPUTER MODELS

The contractor shall deliver the following models used in the performance of the below analyses or used for Computer-Aided Design (CAD)/Computer-Aided Manufacturing (CAM)/Computer-

Aided Engineering (CAE): (DIL #18)

Drawing package required by Section 4.2 of this SOW in dxf format.

4.4 NA

4.5 NA

4.6 THERMAL ANALYSIS DATA

The contractor shall provide data that will enable NASA/GSFC to accurately model the thermal performance of the solar array panels. (DIL #21) This data shall enable a thermal analysis that illustrates that the device and/or the electronic part junction temperatures are within the

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Electrical, Electronic, and Electromechanical (EEE) parts derating guidelines for operation in a vacuum environment. Analysis shall prove that component will be within junction derating temperatures when S/C thermal interface is at maximum qualification temperature and when component is operating at maximum power dissipation. By analysis or by similarity to other flight qualified parts, the contractor shall also prove that operation at minimum survival temperature is not an issue. This data shall include Beginning-of-Life (BOL) and End-of-Life

(EOL) solar cell efficiency as a function of temperature, operating voltage, and degradation, maximum blocking diode and bypass diode dissipations, and the BOL and EOL surface finish thermal properties (i.e., solar absorptance, IR emittance) that will be used to perform the analysis.

4.7 NA

4.8 WORST CASE CIRCUIT ANALYSIS REPORT

The contractor shall perform worst-case analyses for critical parameters that are subject to variations that could degrade performance, and provides data that question the flightworthiness of the design. (DIL #23) These analyses shall address the worst case conditions for the analysis performed on each component. Each analysis shall encompass the mission life and consider the critical parameters set at maximum and minimum limits and include the effect of environmental stresses on the operational parameters being evaluated.

The Worst Case Analysis Report shall include the following:

- Address worst case conditions performed on each component.

- Discuss how each analysis includes the mission life.

- Discuss consideration of critical parameters at maximum and minimum limits.

- The effect of environmental stresses on the operational parameters being evaluated.

The results of these analyses shall be summarized in a Contractor format Worst Case Circuit

Analysis Report that will be provided to the NASA/GSFC COR for review.

4.9 PARTS STRESS ANALYSIS REPORT

The contractor shall perform parts stress analyses on Electrical, Electronic, and

Electromechanical (EEE) parts and devices as employed in the circuit designs of the Flight Item to certify conformance with the derating requirements of EEE parts. (DIL #24) The analyses shall be documented, and justification shall be included for all applications that do not meet the derating criteria. The Contractor shall use NASA document EEE-INST-002, Instructions for

EEE Parts Selection, Screening, Qualification, and Derating to establish criteria. Contractor derating guidelines may be considered in place of EEE-INST-002 guidelines but shall be submitted for approval. (DIL #25) The results of these analyses shall be summarized in a

Contractor format Parts Stress Analysis Report that shall be provided to the NASA/GSFC COR for review.

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4.10 RADIATION HARDNESS ANALYSIS REPORT

The Contractor shall document the radiation hardness assessment for each EEE part with respect to total ionizing dose (TID). For the solar cells, the contractor shall document the radiation degradation characteristics of the cell in terms of 1-MeV electron equivalent fluence. The contractor shall calculate 1-MeV electron equivalent fluence for incident trapped electrons, trapped protons, and solar protons using the relative damage coefficients for the solar cell used on the PACE Solar Array Panels. The contractor shall include the relative damage coefficients used in the analysis in this report.

Test plans and reports for parts that require radiation testing shall be submitted to the

NASA/GSFC COR for review. (DIL #26)

The analysis shall address all the requirements contained in PACE-PWR-SPEC-0062.

The results of these analyses shall be summarized in a Contractor format Radiation Hardness

Analyses Report that will be provided to the NASA/GSFC COR for review.

4.11 RELIABILITY ANALYSIS REPORT

The contractor shall provide a numerical reliability assessment of the component, using reliability data from historical on-orbit performance, life-testing, or data books, such as MIL-

HDBK-217F. (DIL #27) The results of this analysis shall be summarized in a Contractor format

Reliability Analysis Report that will be provided to the NASA/GSFC COR for review.

4.12 FAILURE MODES AND EFFECTS CRITICALITY ANALYSIS REPORT

The contractor shall perform an FMECA (Failure Modes and Effects Criticality Analysis) to identify potential failures with severity categories 1, 1R, 1S, 2, 2R, 3, and 4 per Table 4-1. (DIL

#28)

The FMECA shall be updated throughout the development life cycle to address design changes that result in changes to failure modes, causes, effects, system impact, or to mitigation status and corresponding retention rationale. FMECA shall be performed at the interface and functional level of the component.

Table 4-1 FMEA Severity Categories

Category Severity Severity Description

1 Catastrophic Failure modes that could result in serious injury, loss of life

(flight or ground personnel), or loss of launch vehicle.

1R Failure modes of identical or equivalent redundant hardware items that could result in Category 1 effects if all failed.

1S Failure in a safety or hazard monitoring system that could cause the system to fail to detect a hazardous condition or fail

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to operate during such condition and lead to Category 1 consequences.

2 Critical Failure modes that could result in loss of one or more mission objectives as defined by the NASA/GSFC COR.

2R Failure modes of identical or equivalent redundant hardware items that could result in Category 2 effects if all failed.

3 Significant Failure modes that could cause degradation to mission objectives.

4 Minor Failure modes that could result in insignificant or no loss to mission objectives

We are considering the loss of a single string component to be a category 2 and the loss of a redundant component to be a 2R.

The results of these analyses shall be summarized in a Contractor format Failure Modes And

Effects Criticality Analysis Report that shall be provided to the NASA/GSFC COR for review.

4.13 NA

4.14 NA

4.15 NA

4.16 ELECTRICAL OUTPUT PREDICTIONS

The contractor shall include a prediction of the output of the qualification coupon(s) and the flight solar array panels under test conditions, at beginning of life, and at end of life. (DIL #68)

The contractor shall also include a prediction of qualification coupon output at 1.1 AM0

(perihelion and maximum albedo), 90ºC. The contractor shall predict the coupon I-V curve, taken at the test connector and at the flight connector, under 0.967 AM0 illumination at -90°C, 93ºC, and 100ºC after exposure to the space environment for an interval of 38 months, which is the contractually defined end of life (EOL) for the array. The prediction shall be presented with both graphical and tabular data and shall include the values of short-circuit current (Isc), open-circuit voltage (Voc), current at maximum power (Imp), voltage at maximum power (Vmp), maximum power (Pmax), and power at 35V. The prediction shall account for all environments defined in this specification including the effects of thermal cycling.

4.17 MASS ANALYSIS

The contractor shall supply a mass estimate by component at the DRC and updated at the MRR for the flight panels and qualification coupons.

The contractor shall supply a final measured mass in the EIDP for each flight solar array panel.

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4.18 MAGNETIC FIELD REPORT

The contractor shall perform a magnetic field assessment to estimate the worst-case magnetic fields for each Solar Array Panel. The contractor shall deliver the results of this assessment at

DCR.

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5.0 HARDWARE PROCUREMENT/MANUFACTURING

5.1 GENERAL REQUIREMENTS

The contractor shall either procure or manufacture all components required to assemble, integrate, and test the Solar Array Panels to support the delivery dates as called for in the contract and listed in RFP/contract Section B.

The contractor shall assemble the quantities of Solar Array Panels hardware described below.

5.2 SOLAR ARRAY PANELS

The contractor shall provide the following hardware to meet the requirements of the PACE Project

Solar Array Panels Specification, PACE-PWR-SPEC-0062.

a) Qualification coupons in sufficient quantity to meet the testing requirements of AIAA-S-

112A-2013 as tailored in the PACE Solar Array Panels Specification, PACE-PWR-

SPEC-0062. Qualification coupons are identical to the flight panels in every respect except size and number of components. (DIL #76)

b) Flight Solar Array Panels (DIL #77)

c) Shipping containers for Qualification Coupons and Flight Solar Array Panels (DIL #78)

The contractor shall include in the proposal the cost to purchase all hardware including all supporting hardware.

5.3 CONNECTOR SAVERS

The contractor shall supply flight quality connector savers for each flight connector on the flight panels. Prior to delivery, the contractor shall use the savers for every connection made to flight connectors. (DIL #79)

Connector savers shall be vacuum compatible.

5.4 SUPPORTING HARDWARE

5.4.1 Mating Connectors, Test Harnesses, and Connectors for Breakout Boxes

The contractor shall supply test harnesses with connectors on one end that mate to the flight panels’ flight and test connectors. The connectors on the other end shall mate to breakout boxes.

The harness between the mating connector and the breakout box connector shall be four meters

±.02 meters long. The connectors and the harness shall be flight-quality.

There shall be one test harness with connectors for each test connector and flight connector on a panel. (DIL #80)

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5.4.2 Connector Caps

The contractor shall supply a flight quality closeout cap for each of the test connectors. (DIL

#81)

5.4.3 Witness Foils

The contractor shall replace the witness foils described in section 3.6.3 of this document and deliver the used ones to the NASA/GSFC COR. (DIL #82)

5.5 NA

5.6 SAMPLE CICS

The contractor shall deliver sample coverglass, interconnect, cell (CIC) assemblies of the type used on the qualification coupons and flight solar array panels. NASA/GSFC will measure the solar absorptance and emittance of these CICs to more accurately model the thermal performance of the solar array. (DIL #83)

5.7 DIODE BOARDS

All flight and test diode boards shall meet the requirements of the PACE Solar Array Panels

Specification, PACE-PWR-SPEC-0062.

Prior to population of the flight boards, the contractor shall provide test boards for each board type used in the flight hardware.

1. The test board shall be clearly identified with the part number and revision letter, serial number, vendor identification and date code or production lot number.

2. The paperwork accompanying the test board shall include the part number and revision letter, serial number, vendor identification and date code or production lot number.

Two weeks prior to shipping the boards, the contractor shall notify the NASA/GSFC COR that they plan to ship. (DIL #84)

Flight diode boards shall not be assembled prior to notification that the representative test boards have been satisfactorily evaluated by the NASA/GSFC COR.

The contractor shall not use printed wiring boards or printed circuit boards on flight or qualification articles.

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5.8 REPAIR PARTS

The contractor shall supply parts sufficient to repair 100 damaged solar cells on the completed panels including the covers, cells, bypass diodes, if not integrated into the cell, interconnects, and electrostatic and magnetic cleanliness hardware. The contractor may supply these parts as cover, interconnect, cell assemblies (CIC)s if that fits its repair procedures better than individual parts.

In addition, the contractor shall supply parts sufficient to repair 30 damaged covers on the completed panels. The contractor may supply these parts as CICs if that fits its repair procedures better than covers. (DIL #85)

The contractor shall supply 1,000 centimeters of each type wire it has used in fabricating the panels.

The contractor shall supply 10 blocking diodes of the type it has used in fabricating the panels.

The contractor shall supply 1 terminal board of each type it has used in fabricating the panels.

The contractor shall supply spare connectors, pins, and sockets as required by the Contract

Hardware Deliverables List.

With the exception of adhesives, the contractor shall supply other parts it deems necessary to repair the panels.

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6.0 PERFORMANCE VERIFICATION AND TEST

6.1 NA

6.2 NA

6.3 QUALIFICATION COUPONS TEST PLAN

The contractor shall deliver a Qualification Coupon(s) Test Plan for the verification tests required by the PACE Solar Array Panels Specification, PACE-PWR-SPEC-0062. (DIL #69)

Tests must demonstrate acceptable performance over the specified range of performance requirements, measure performance parameters and reveal inadequacies in manufacturing and assembly such as workmanship or material problems. The plan shall state the purpose of each test, state acceptance criteria, describe in detail the test method and instrumentation, and give the sequence of the tests. The plan shall include a test matrix summarizing all tests that will be performed.

6.4 FLIGHT SOLAR ARRAY PANELS TEST PLAN

The contractor shall deliver a Test Plan for the verification tests required by this document and by the PACE Solar Array Panels Specification, PACE-PWR-SPEC-0062. (DIL #70) Tests must demonstrate acceptable performance over the specified range of performance requirements, measure performance parameters and reveal inadequacies in manufacturing and assembly such as workmanship or material problems.

The plan shall state the purpose of each test, state acceptance criteria, describe in detail the test method and instrumentation, and give the sequence of the tests. The plan shall include a test matrix summarizing all tests that will be performed.

The contractor shall formally control this document and shall indicate all changes made after the initial approval by the GSFC. After test plan approval, the NASA/GSFC COR must approve all changes in writing.

6.5 QUALIFICATION COUPONS TEST PROCEDURES

The contractor shall supply Qualification Coupon Test Procedures, step-by-step instructions for performing tests outlined in the Test Plan.