MOCAT-pySSEM: An open-source Python library and user interface for orbital debris and source sink environmental modeling

The rapid increase in the number of Low-Earth Orbit (LEO) satellites and reducing launch costs is likely to threaten the orbital environment. Understanding how this growth will affect the orbital debris population is paramount to designing effective policy, regulation and mitigation to protect the l...

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Main Authors: Indigo Brownhall, Miles Lifson, Stephen Hall, Charles Constant, Giovanni Lavezzi, Marek Ziebart, Richard Linares, Santosh Bhattarai
Format: Article
Language:English
Published: Elsevier 2025-05-01
Series:SoftwareX
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Online Access:http://www.sciencedirect.com/science/article/pii/S2352711025000299
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author Indigo Brownhall
Miles Lifson
Stephen Hall
Charles Constant
Giovanni Lavezzi
Marek Ziebart
Richard Linares
Santosh Bhattarai
author_facet Indigo Brownhall
Miles Lifson
Stephen Hall
Charles Constant
Giovanni Lavezzi
Marek Ziebart
Richard Linares
Santosh Bhattarai
author_sort Indigo Brownhall
collection DOAJ
description The rapid increase in the number of Low-Earth Orbit (LEO) satellites and reducing launch costs is likely to threaten the orbital environment. Understanding how this growth will affect the orbital debris population is paramount to designing effective policy, regulation and mitigation to protect the long term space sustainability of LEO. This will require interdisciplinary research of potential impacts, demanding contributions from social scientists, economists, astronomers, and alike. However, the complexity of astrodynamics and technical ability to build evolutionary space environment models often poses a significant barrier to interdisciplinary engagement, impeding critical research in this area. Previous models and tools have been developed, but are often not open-source nor accessible. MIT Orbital Capacity Assessment Tools (MOCAT) was developed to provide an open-source evolutionary space environment modeling capability to the broader space and policy communities, featuring both a computationally intensive but higher fidelity full-scale Monte Carlo model (MOCAT-MC) and a lower fidelity but significantly faster source sink evolutionary modeling framework, (MOCAT-SSEM). Here we continue this journey by presenting a Python version of the source sink tool, MOCAT-pySSEM with an accompanying web application (featuring cloud-hosted computation) to support future interdisciplinary research.
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spelling doaj-art-c2995ba105474441ba29f72cbaa598d92025-08-20T03:05:21ZengElsevierSoftwareX2352-71102025-05-013010206210.1016/j.softx.2025.102062MOCAT-pySSEM: An open-source Python library and user interface for orbital debris and source sink environmental modelingIndigo Brownhall0Miles Lifson1Stephen Hall2Charles Constant3Giovanni Lavezzi4Marek Ziebart5Richard Linares6Santosh Bhattarai7Space Geodesy and Navigation Laboratory, University College London, United Kingdom; Corresponding author.The Aerospace Corporation, United StatesSpace Geodesy and Navigation Laboratory, University College London, United Kingdom; The Aerospace Corporation, United States; Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, United StatesSpace Geodesy and Navigation Laboratory, University College London, United KingdomDepartment of Aeronautics and Astronautics, Massachusetts Institute of Technology, United StatesSpace Geodesy and Navigation Laboratory, University College London, United KingdomDepartment of Aeronautics and Astronautics, Massachusetts Institute of Technology, United StatesSpace Geodesy and Navigation Laboratory, University College London, United KingdomThe rapid increase in the number of Low-Earth Orbit (LEO) satellites and reducing launch costs is likely to threaten the orbital environment. Understanding how this growth will affect the orbital debris population is paramount to designing effective policy, regulation and mitigation to protect the long term space sustainability of LEO. This will require interdisciplinary research of potential impacts, demanding contributions from social scientists, economists, astronomers, and alike. However, the complexity of astrodynamics and technical ability to build evolutionary space environment models often poses a significant barrier to interdisciplinary engagement, impeding critical research in this area. Previous models and tools have been developed, but are often not open-source nor accessible. MIT Orbital Capacity Assessment Tools (MOCAT) was developed to provide an open-source evolutionary space environment modeling capability to the broader space and policy communities, featuring both a computationally intensive but higher fidelity full-scale Monte Carlo model (MOCAT-MC) and a lower fidelity but significantly faster source sink evolutionary modeling framework, (MOCAT-SSEM). Here we continue this journey by presenting a Python version of the source sink tool, MOCAT-pySSEM with an accompanying web application (featuring cloud-hosted computation) to support future interdisciplinary research.http://www.sciencedirect.com/science/article/pii/S2352711025000299Space debrisEvolutionary modelSpace sustainabilityAstrodynamicsOrbital carrying capacity
spellingShingle Indigo Brownhall
Miles Lifson
Stephen Hall
Charles Constant
Giovanni Lavezzi
Marek Ziebart
Richard Linares
Santosh Bhattarai
MOCAT-pySSEM: An open-source Python library and user interface for orbital debris and source sink environmental modeling
SoftwareX
Space debris
Evolutionary model
Space sustainability
Astrodynamics
Orbital carrying capacity
title MOCAT-pySSEM: An open-source Python library and user interface for orbital debris and source sink environmental modeling
title_full MOCAT-pySSEM: An open-source Python library and user interface for orbital debris and source sink environmental modeling
title_fullStr MOCAT-pySSEM: An open-source Python library and user interface for orbital debris and source sink environmental modeling
title_full_unstemmed MOCAT-pySSEM: An open-source Python library and user interface for orbital debris and source sink environmental modeling
title_short MOCAT-pySSEM: An open-source Python library and user interface for orbital debris and source sink environmental modeling
title_sort mocat pyssem an open source python library and user interface for orbital debris and source sink environmental modeling
topic Space debris
Evolutionary model
Space sustainability
Astrodynamics
Orbital carrying capacity
url http://www.sciencedirect.com/science/article/pii/S2352711025000299
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