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Pegasus User Guide

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Pegasus User Guide This page left intentionally blank. Pegasus User’s Guide Preface The information provided in this Pegasus User’s Guide is for initial planning purposes for potential space- craft customers to utilize Pegasus Launch Services. Information for development/design of spacecraft and/or launch services are determined through mission specific engineering analyses. The results of these analyses are documented in a mission-specific Interface Control Document (ICD) for the spacecraft organ- ization to use in their development/design process. This document provides an overview of the Antares system design and a description of the services provided to our customers. For technical information and additional copies of this User’s Guide, contact: Northrop Grumman Space Systems Sector Sector Headquarters Launch and Missile Defense Systems Division Headquarters 45101 Warp Drive 1575 South Price Road Dulles, VA 20166 Chandler, AZ 85286 +1 (703) 406-5000 +1 (480) 899-6000 www.northropgrumman.com Warren Frick Manager, Business Development (703) 234-3935 [email protected] Release 8.2 September 2020 iii Pegasus User’s Guide Preface This page left intentionally blank. Release 8.2 September 2020 iv Pegasus User’s Guide Table of Contents TABLE OF CONTENTS PAGE 1. INTRODUCTION ............................................................................................................................... 11 2. PEGASUS DESCRIPTION ............................................................................................................... 13 2.1. Pegasus XL Vehicle Description ................................................................................................. 13 2.1.1. Solid Rocket Motors ................................................................................................................ 16 2.1.2. Payload Fairing ........................................................................................................................ 16 2.1.3. Avionics ................................................................................................................................... 16 2.1.4. Attitude Control Systems ......................................................................................................... 17 2.1.5. Telemetry Subsystem .............................................................................................................. 17 2.1.6. Major Structural Subsystems ................................................................................................... 18 2.1.6.1. Wing .................................................................................................................................. 18 2.1.6.2. Aft Skirt Assembly ............................................................................................................. 18 2.1.6.3. Payload Interface Systems ............................................................................................... 18 2.2. NGIS Carrier Aircraft ................................................................................................................... 18 3. GENERAL PERFORMANCE CAPABILITY ...................................................................................... 19 3.1. Mission Profiles ........................................................................................................................... 19 3.2. Performance Capability ............................................................................................................... 21 3.3. Trajectory Design Optimization ................................................................................................... 22 3.4. Orbit Insertion Accuracy .............................................................................................................. 23 3.4.1. Actual Pegasus Insertion Accuracies ...................................................................................... 23 3.4.2. Error-Minimizing Guidance Strategies ..................................................................................... 24 3.5. Collision/Contamination Avoidance Maneuver ........................................................................... 25 4. PAYLOAD ENVIRONMENTS ........................................................................................................... 27 4.1. Design Loads .............................................................................................................................. 27 4.2. Payload Testing and Analysis ..................................................................................................... 28 4.3. Payload Acceleration Environment ............................................................................................. 28 4.4. Payload Random Vibration Environment .................................................................................... 30 4.5. Sinusoidal Vibration .................................................................................................................... 31 4.6. Payload Shock Environment ....................................................................................................... 31 4.7. Payload Acoustic Environment ................................................................................................... 32 4.8. Pressure Profile .......................................................................................................................... 32 4.9. Payload Thermal Environment.................................................................................................... 34 4.9.1. Payload Processing ................................................................................................................. 34 4.9.2. Transportation.......................................................................................................................... 34 4.9.3. Ground Operations at the Flightline and Launch Operations .................................................. 34 4.9.4. Powered Flight ......................................................................................................................... 34 4.9.5. Nitrogen Purge ........................................................................................................................ 35 4.10. Payload Electromagnetic Environment ....................................................................................... 35 4.11. Payload Contamination Control .................................................................................................. 36 5. SPACECRAFT INTERFACES .......................................................................................................... 39 5.1. Payload Fairing ........................................................................................................................... 39 5.1.1. Fairing Separation Sequence .................................................................................................. 39 5.1.2. Payload Design Envelopes ...................................................................................................... 39 5.1.3. Payload Access Door .............................................................................................................. 39 5.2. Payload Mechanical Interface and Separation System .............................................................. 45 5.2.1. Standard Nonseparating Mechanical Interface ....................................................................... 45 5.2.2. Standard Separating Mechanical Interface ............................................................................. 45 5.3. Payload Electrical Interfaces....................................................................................................... 45 5.3.1. Standard Electrical Interface ................................................................................................... 49 5.3.2. Mission-Unique Electrical Interface ......................................................................................... 50 5.3.2.1. Range Safety Interfaces/Vehicle Flight Termination ......................................................... 51 5.3.2.2. Electrical Isolation ............................................................................................................. 51 5.3.2.3. Pre-Drop Electrical Safing ................................................................................................. 51 5.4. Payload Design Constraints........................................................................................................ 51 5.4.1. Payload Center of Mass Constraints ....................................................................................... 51 Release 8.2 September 2020 v Pegasus User’s Guide Table of Contents TABLE OF CONTENTS (CONTINUED) PAGE 5.4.2. Final Mass Properties Accuracy .............................................................................................. 53 5.4.3. Payload EMI/EMC Constraints ................................................................................................ 53 5.4.4. Payload Stiffness ..................................................................................................................... 53 5.4.5. Payload Propellant Slosh ........................................................................................................ 53 5.4.6. Customer Separation System Shock Constraints ................................................................... 53 5.4.7. System Safety Constraints .....................................................................................................
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