NASA/TP-2016-218600-REV1 Debris Assessment Software User’s Guide Version 2.1 Orbital Debris Program Office Eugene G. Stansbery NASA Johnson Space Center Houston, Texas John Opiela Andrew Vavrin Billy Draeger Phillip Anz-Meador Jacobs Houston, Texas National Aeronautics and Space Administration Lyndon B. Johnson Space Center Houston, Texas 77058 October 2016 THE NASA STI PROGRAM OFFICE . IN PROFILE Since its founding, NASA has been • CONFERENCE PUBLICATION. dedicated to the advancement of aeronautics Collected papers from scientific and and space science. The NASA Scientific and technical conferences, symposia, Technical Information (STI) Program Office seminars, or other meetings sponsored or plays a key part in helping NASA maintain cosponsored by NASA. this important role. • SPECIAL PUBLICATION. 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Johnson Space Center Houston, Texas 77058 October 2016 Acknowledgements The DAS 2.0 was developed by the NASA Orbital Debris Program Office at Johnson Space Center in Houston, between October 2003 and September 2006. The development team was led by John N. Opiela. Additional team members included Jose Dobarco-Otero, Barbara Hadjisavvas, Marsha Hennigan, Eric Hillary, Nicholas Johnson, Paula Krisko, Jer-Chyi Liou, Mark Matney, Ries Smith, Eugene Stansbery, and David Whitlock. Thanks to Andrew Vavrin and Mark Matney for their efforts in the upgrade to version 2.1, incorporating the new ORDEM 3.0 debris model. The development team thankfully acknowledges the careful review and detailed comments and suggestions provided by the software beta review panel. Available from: NASA Center for AeroSpace Information National Technical Information Service 7115 Standard Drive 5285 Port Royal Road Hanover, MD 21076-1320 Springfield, VA 22161 301-621-0390 703-605-6000 This report is also available in electronic form at http://ston.jsc.nasa.gov/collections/TRS/ REVISION AND HISTORY PAGE REV. DESCRIPTION PUB. DATE Initial New Document: Reference JSC 64047 November Release 2007 Rev. A Throughout: Update to Section 1.1, 1.2, and 3.10. January 2012 Revised Changed ORDEM2000 to ORDEM 3.0. Added notes about March 2016 for DAS increased run time due to ORDEM 3.0. Changed general references 2.1 to the software from “DAS 2.0” to simply “DAS 2”. Clarifications and additions related to installing and running DAS 2.1. Updated the acceptable mission date range to match the new DAS date range of 2010-2070. i ii Table of Contents List of Figures ..................................................................................................................................... v List of Tables ....................................................................................................................................... v List of Plots ........................................................................................................................................ vi 1. Introduction ................................................................................................................................ 1 1.1 Scope and Limitations .......................................................................................................... 1 1.2 Software Changes ................................................................................................................. 1 1.2.1 Changes from DAS 1.5.3 to DAS 2.0 ................................................................................ 1 1.2.2 Changes to DAS 2.0 ........................................................................................................... 2 1.2.3 Changes from DAS 2.0 to DAS 2.1 ................................................................................... 2 1.3 Software Installation and Removal ...................................................................................... 3 2. DAS Main Window Features .................................................................................................... 5 2.1 Viewing Toolbars ................................................................................................................. 5 2.2 Using the Mission Editor ...................................................................................................... 7 2.3 Requirement Assessments ................................................................................................... 13 2.4 Science and Engineering Utilities ........................................................................................ 14 2.5 Using the Material Database Editor .................................................................................... 15 2.6 Using the Plot Viewer .......................................................................................................... 15 2.7 Using the Date Conversion Utility ....................................................................................... 18 2.8 Viewing the Activity Log ...................................................................................................... 18 2.9 Saving and Loading Projects ............................................................................................... 19 3. Assessing Compliance with the NASA Debris Requirements .............................................. 20 3.1 Requirement 4.3-1: Debris Passing Through LEO ........................................................... 20 3.2 Requirement 4.3-2: Debris Passing Near GEO ................................................................ 22 3.3 Requirements 4.4-1, 4.4-2, and 4.4-4: Not Covered by DAS ............................................ 24 3.4 Requirement 4.4-3: Planned Breakups ............................................................................. 24 3.5 Requirement 4.5-1: Limiting Debris Generated by Collisions with Large Objects .......... 26 3.6 Requirement 4.5-2: Probability of Damage from Small Debris ....................................... 28 3.7 Requirement 4.6-1, -2, -3: Postmission Disposal of Space Structures ............................. 31 3.8 Requirement 4.6-4: Postmission Disposal Reliability ....................................................... 35 3.9 Requirement 4.7-1: Casualty Risk from Uncontrolled Reentry ........................................ 35 3.10 Requirement 4.8-1: Mitigate the Collision Hazard of Space Tethers ............................... 40 iii 4. Science and Engineering Utilities ............................................................................................ 45 4.1 On-Orbit Collisions ............................................................................................................ 45 4.1.1 Debris Impacts vs. Orbit Altitude .................................................................................. 45 4.1.2 Debris Impacts vs. Debris Diameter .............................................................................. 48 4.1.3 Debris Impacts vs. Start Date ......................................................................................... 51 4.2 Analysis of Postmission Disposal