Crew Launch Vehicle CLV Upper Stage Avionics Software

Crew Launch Vehicle (CLV) Upper Stage Avionics & Software Acquisition Planning Charles Nola Lisa Blue June 21, 2006

Upper Stage Avionics & Software System Acquisition Strategy Baseline Approach - NASA leads Avionics System requirements, specification, architecture, and component specification development. NASA performs risk reduction for critical design areas. NASA maintains design lead role. Avionics Prime Contractor procures, integrates, and tests the Integrated Upper Stage Avionics System and transitions into production/flight phase. NASA Team in-house development of Element Requirements Document (ERD), interface requirements documents, Avionics and Software System Specification, and Architecture, Component and Software Specifications, Upper Stage Avionics Design Definition Document NASA performs risk reduction responsibilities for critical Avionics design decisions Avionics Prime Contractor is brought on, through competition, four months prior to US PDR, which provides an opportunity for collaboration on the component and software specifications. NASA leads the PDR. The NASA Team maintains the overall responsibility for design while the Avionics Prime Contractor provides an integrated solution for procuring (or building), accepting, electrically integrating, and testing the Upper Stage Avionics System. Post DDT&E, the Avionics Prime Contractor transitions into production/flight phase. NASA maintains lead for Flight Software Development and a planned transitions to the Avionics Prime Contractor prior to the first CLV Test Flight. NASA will augment their software workforce. The Avionics Prime Contractor procures, electrically integrates, and tests Upper Stage Avionics System for MPTA and Upper Stage System Level Test (such as Green-runs) and all Flights within the period of performance of the contract. NASA transitions into traditional insight role. The Avionics Prime Contractor supports mechanical integration at MPTA. Upper Stage Prime delivers Instrument Unit Structure and the Avionics Prime Contractor performs mechanical integration of Avionics at MAF. The Avionics Prime Contractor procures, electrically integrates, and tests Upper Stage EGSE for Systems Integration Laboratory (SIL), MAF, any required for Launch Processing Options: Development Flight Instrumentation remains in-house NASA DDT&E Baseline Approach - Upper Stage Office is delegated responsibility from Vehicle Integration Office for CLV Stack (Element to Element) Electrical Integration and Verification NASA team with augmented workforce develops verification plans, procedures, and performs electrical integration and verification 2

DDT&E and Production Roadmap Shelf Component End Item Specification Acquisition Qualification Test SDF (Flight Software) SITF Component Certificate of Qualification Component End Item Specification Acquisition Certification Test Acceptance Production/Flight (Gov Project Office) US EGSE Software Engine Avionics HWIL Software FS EGSE Acceptance Test Avionics Prime Contractor Government Team First Stage Avionics HWIL Engine EGSE SITF (Flight Software) First Stage Avionics Components Upper Stage EGSE CEV SIMULATION Vehicle Checkout Instrument Unit First Stage EGSE Upper Stage Engine Avionics Components Software Stage Checkout GOE SIMULATION (Flight Software) Upper Stage Avionics HWIL GOE SIMULATION SDF Acceptance Test Upper Stage Avionics Components Acceptance Test Systems. Integration System Laboratory (SIL) Laboratory GOE (EGSE) DDT&E (Government Insight) Multi-Line Test Operations 3

CLV Avionics System Requirements Flow CARD Exploration SRD Constellation Working Groups (e. g. , C 3 I) NASA NPR Requirements & NASA Standards Avionics and Software Trade Studies Human Rating Plan Design Reference Missions Constellation Con. Ops Constellation T&V Plan NEDD & DSNE CLV Con. Ops CLV Avionics Architecture Definition Document This document is required at RFP release (NASA responsibility) NASA In-house Team Products Upper Stage Design Definition Document 4

Upper Stage Integrated Roadmap US SRR US SDR US PDR US CDR Avionics Prime Contract US DCR Producibility Support Avionics Component Acquisition, Acceptance, Mfg Process Development Integration and Checkout Avionics Component and EGSE Sustaining Engineering Structural Development Test Articles Flight Software Sustaining Engineering Pathfinder Battleship Stage MPS Advanced Development RCS Advanced Development TVC Advanced Development Ground Tests Flight Tests Avionics Production Contract RFP Release Award Flight Unit RFP Release Award Vibration Structural Test Article Flight Unit Solicitation Eval Avionics System DDT&E, Production, and Operations Support Av Component Dev Testing SWRR PDR Avionics & Software Development SIL Testing – MPTA, Upper Stage Avionics System Integration ICDR Flight Avionics Hardware Design Flight Avionics Design Verification Fab Avionics Qualification Units Upper Stage Avionics Flight Units US DAC-1 US DAC-2 US DAC-3 US DAC-4 US DAC-5 5