The University of Southampton
University of Southampton Institutional Repository

Evolution of artificial space debris clouds

Evolution of artificial space debris clouds
Evolution of artificial space debris clouds
Over 120 cases of on-orbit breakups have now been recorded. Many more undetected events are believed to have occurred. Each time an object breaks up, whether by explosion or collision, a cloud of debris is formed. The overall objective of the PhD is to examine the interaction between the debris clouds produced by on-orbit fragmentation events and specific space systems. A breakup event will give rise to concentrations of debris which, for some time after the event, will have spatial densities considerably higher than the background flux. Thus, a detailed knowledge of the extent to which the cloud will grow over a given time period, and an accurate assessment of the risk of collision for a spacecraft passing through it, may prove to be important in mission planning and satellite shielding design.

The SDS (Space Debris Simulation) software suite has been developed to carry out the analysis presented in this thesis and now represents the state-of-the-art in debris cloud modelling. The integrated structure of the developed software enables a wide variety of analyses to be conducted and simulations of both historic and potential future orbital fragmentation events to be performed. Program BREAKUP uses a combination of empirical and analytical models to simulate catastrophic and non-catastrophic collisions, and also variable intensity explosive fragmentations. Included in BREAKUP is a novel parametric model for producing and controlling non-isotropic fragment spreads. TRAJECTORY acts as a test-bed for orbit propagation techniques, providing the facility for convenient and direct method comparison. EVOLUTION enables the complex dynamics of debris cloud growth to be visualised and in particular the effects of propagation method to be examined. Program TARGET employs a novel implementation of the method of probabilistic continuum dynamics to perform collision hazard assessments for spacecraft which encounter debris clouds. Among the additional new developments included in TARGET are the consideration of atmospheric drag, a direct interface with a non-isotropic cloud model, the use of a cellular target spacecraft representation and impact energy-related damage assessment algorithm, and a built-in satellite constellation analysis facility. A number of case studies are presented to illustrate the modelling capabilities of the SDS software suite, including the simulation of several historic fragmentation events and the debris cloud collision risks to ENVISAT-1 and the Iridium™ satellite constellation. The results produced by the models are validated by comparisons with other simulation software and, wherever possible, with actual breakup event, debris impact and spacecraft, orbit, data.
Barrows, Simon
06fb98ed-4f21-4d3f-a562-feff16b85853
Barrows, Simon
06fb98ed-4f21-4d3f-a562-feff16b85853

Barrows, Simon (1996) Evolution of artificial space debris clouds. University of Southampton, Department of Aeronautics and Astronautics, Doctoral Thesis, 272pp.

Record type: Thesis (Doctoral)

Abstract

Over 120 cases of on-orbit breakups have now been recorded. Many more undetected events are believed to have occurred. Each time an object breaks up, whether by explosion or collision, a cloud of debris is formed. The overall objective of the PhD is to examine the interaction between the debris clouds produced by on-orbit fragmentation events and specific space systems. A breakup event will give rise to concentrations of debris which, for some time after the event, will have spatial densities considerably higher than the background flux. Thus, a detailed knowledge of the extent to which the cloud will grow over a given time period, and an accurate assessment of the risk of collision for a spacecraft passing through it, may prove to be important in mission planning and satellite shielding design.

The SDS (Space Debris Simulation) software suite has been developed to carry out the analysis presented in this thesis and now represents the state-of-the-art in debris cloud modelling. The integrated structure of the developed software enables a wide variety of analyses to be conducted and simulations of both historic and potential future orbital fragmentation events to be performed. Program BREAKUP uses a combination of empirical and analytical models to simulate catastrophic and non-catastrophic collisions, and also variable intensity explosive fragmentations. Included in BREAKUP is a novel parametric model for producing and controlling non-isotropic fragment spreads. TRAJECTORY acts as a test-bed for orbit propagation techniques, providing the facility for convenient and direct method comparison. EVOLUTION enables the complex dynamics of debris cloud growth to be visualised and in particular the effects of propagation method to be examined. Program TARGET employs a novel implementation of the method of probabilistic continuum dynamics to perform collision hazard assessments for spacecraft which encounter debris clouds. Among the additional new developments included in TARGET are the consideration of atmospheric drag, a direct interface with a non-isotropic cloud model, the use of a cellular target spacecraft representation and impact energy-related damage assessment algorithm, and a built-in satellite constellation analysis facility. A number of case studies are presented to illustrate the modelling capabilities of the SDS software suite, including the simulation of several historic fragmentation events and the debris cloud collision risks to ENVISAT-1 and the Iridium™ satellite constellation. The results produced by the models are validated by comparisons with other simulation software and, wherever possible, with actual breakup event, debris impact and spacecraft, orbit, data.

Text
96069550.pdf - Other
Download (13MB)

More information

Published date: March 1996
Organisations: University of Southampton

Identifiers

Local EPrints ID: 192401
URI: http://eprints.soton.ac.uk/id/eprint/192401
PURE UUID: caf07013-6072-4b40-a81f-954bb6806a3e

Catalogue record

Date deposited: 11 Jul 2011 15:56
Last modified: 14 Mar 2024 03:50

Export record

Contributors

Author: Simon Barrows

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×