Section 20.0

Mission Assurance

Roger Counts

Systems Assurance Manager

ST5 PDR June 19-20, 2001

GSFC 5Space Technology

“Tomorrow’s Technology Today”

GSFC

ST5 PDR June 19-20, 2001 20-2

Mission Assurance Organization

Project Manager Systems

Assurance Manager

Quality Assurance

• Quality Engineering

• S/W Quality Assurance

• Inspection/Audits

• Certification/Training

• NCRCA

• MRB

Systems Safety and Reliability

• Systems Safety Engineer

• Reliability Engineer

• Environmental Program

Materials Engineering

• Materials Engineer

• Coupon Analysis

• Material Usage Agreements

• Analysis Lab

Parts Engineering

• Parts Engineer

• Parts Selection/stocking

• Alerts

• Analysis Lab

Systems Review Office

OSSMA (Code 300)

•

GSFC

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Mission Assurance Requirements• Tailored from the requirements suggested by the

Mission Assurance Guidelines GPG 8730.4.2

• Contained in “Mission Assurance Requirements for the ST5 Project”, ST5-495-010

• Technical Reviews in addition to Peer Reviews– System Concept Review (SCR) – Completed May 2000

– Preliminary Design Review (PDR) – June 19-20, 2001

– Critical Design Review (CDR)

– Pre-Environmental Review (PER)

– Mission Operations Review (MOR)

– Pre-Shipment Review (PSR)

– Flight Operations Review (FOR)

– Flight Readiness Review (FRR)

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Mission Assurance Requirements•Design Verification

– Performance Verification Plan (PVP)

– Verification Program based upon GEVS-SE

– Verification Matrix (for both H/W and S/W)

– Environmental Test Matrix

– Procedures and Reports

– Protoflight and Acceptance testing to ST5 S/C Specification and Requirements document (ST5-495-007) • Protoflight testing shall be performed on the first Flight Unit of the ST5

constellation

• Acceptance testing shall be performed on follow-on Flight Units

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•Safety

– “ST5 System Safety Implementation Plan”, ST5-495-040 - Approved

– Assumes use of ELV, and not Shuttle

– Developers provide required information for GSFC Safety Engineer

– GSFC has overall safety responsibility

•Parts Requirements

– PPL-21, Grade 2 as baseline. Lot specific Qualification and DPA implemented based on part heritage. Parts Control Plan currently in draft form; is being implemented for all subsystems.

– Parts Control Board review of selected parts. Approved parts will be added to ST5 PAPL and posted on web site.

Mission Assurance Requirements

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•Electronic Packaging and Process– NASA Workmanship Standards

– Coupon Evaluation

•Materials– NASA Publication 1124, Outgassing Data for Selecting S/C

Materials, shall be used as a guide.

– Materials approved via a Materials Control Board chaired by Project Materials Engineer

– Materials must meet CVCM level 0.1% and TML of 1.0%

– Non-approved materials or nonconventional use of materials processed via Materials Usage Agreement (MUA)

– GSFC S-313-100, GSFC Fastener Integrity Requirements

Mission Assurance Requirements

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•Reliability

– FMEA – To be completed by CDR

– Fault Tree Analysis - To be completed by CDR

– Probability Risk Assessment (PRA)

– Assessments shall include Worst Case Analysis, Parts Stress Analysis, and limited life items program

Mission Assurance Requirements

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Mission Assurance Requirements

•Quality Manual (or equivalent) required from major subcontractors (All are due prior to CDR)– Cold Gas Micro-Thruster System - Marotta Scientific Controls, Inc.

• Approved

– Li-Ion Battery - AEA Technology

– X-Band Transponder Communications System - AeroAstro

• Received Draft Version

– Flexible Cable - Lockheed Martin Astronautics, Denver

– Autonomous Ground-Based Constellation Management S/W - JPL/Bester Tracking Systems, Inc

– Magnetometer - UCLA

• Received Draft Version

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Mission Assurance Requirements

•Contamination

– Contamination Control Plan

•S/W

– S/W Management Plan

• Configuration Control

• Quality Assurance

• Testing

• Performance Validation Matrix

• IV&V

– MOA with Code 307 outlining the extent of IV&V