NASA Procedural Requirements

NPR 8079.1 Effective Date: June 27, 2023 Expiration Date: June 27, 2028

Subject: NASA Spacecraft Conjunction Analysis and Collision Avoidance for Space Environment Protection

Responsible Office: Office of the Chief Engineer

Table of Contents

Preface

P.1 Purpose
P.2 Applicability
P.3 Authority
P.4 Applicable Documents and Forms
P.5 Measurement/Verification
P.6 Cancellation

Chapter 1. Introduction

1.1 Intent to Mitigate Spacecraft Collision Risk
1.2 Conjunction Analysis and Mitigation and the Project Life-Cycle
1.3 Conjunction Analysis and Mitigation Process Key Documents
1.4 Intra- and Interagency Coordination of Collision Avoidance

Chapter 2. Roles and Responsibilities

2.1 Office of the NASA Chief Engineer
2.2 Mission Directorate Associate Administrators
2.3 Project Managers
2.4 Conjunction Assessment Risk Analysis Program Manager
2.5 JSC Flight Operations Directorate Officers
2.6 SOMD Launch Services Office Manager

Chapter 3. Early Phase Planning for the Conjunction Analysis and Mitigation Process and Key Product Requirements

3.1 Overview
3.2 Orbital Collision Avoidance Plan
3.3 Conjunction Assessment Operations Implementation Agreement

Chapter 4. Conjunction Analysis and Mitigation Process Implementation

4.1 Overview
4.2 Conjunction Assessment Step
4.3 Conjunction Risk Assessment Step
4.4 Conjunction Mitigation Step

Chapter 5. Technical Requirements

5.1 Ephemeris Sharing
5.2 Maneuverable Spacecraft
5.3 Conjunction Mitigation
5.4 Post-Launch Deployments
5.5 Advanced Capabilities

Appendix A. Definitions
Appendix B. Acronyms
Appendix C. Compliance Matrix
Appendix D. Orbital Collision Avoidance Plan Template
Appendix E. Conjunction Assessment Operations Implementation Agreement (CAOIA) Elements
Appendix F. References

Table of Figures

Figure 1-1 Earth-Orbiting Collision Avoidance Process for a NASA-Owned or -Operated Spacecraft
Figure 1-2 Conjunction Assessment
Figure 1-3 Conjunction Risk Assessment
Figure 1-4 Conjunction Mitigation
Figure 3-1 Orbital Collision Avoidance Plan Flow
Figure 4-1 Conjunction Analysis and Mitigation Process Flowchart

List of Tables

Table 3-1 Example Conjunction Assessment Activities Throughout an NPR 7120.5 Project Life Cycle
Table 3-2 Example Conjunction Assessment Activities Throughout an NPR 7120.8 Project Life Cycle
Table 5-1 Ephemeris Specifications
Table C-1 NASA Spacecraft Conjunction Analysis and Collision Avoidance for Space Environment Protection Compliance Matrix
Table D-1. Planning Activities for Deployment Scenarios
Table D-2. Inputs, Analyses, and Context for OCAP Fields

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