Hello! Welcome to pyssem 👋

pySSEM is a tool that investigates the evolution of the space objects population in Low Earth Orbit (LEO) by exploiting a new probabilistic source-sink model. The objective is to provide tools to understand the dynamics of the space environment and to predict the future distribution of space objects. This is an extension of MOCAT (MIT Orbital Capacity and Assessment Tool).

This is carried out through the long-term propagation of the proposed source-sink model, which globally takes into account different object species, such as active satellites, derelict satellites, debris, and additional subgroups. Since the Space Objects (SOs) are propagated as species, the information about single objects is missing, but it allows the model to be computationally fast and provide essential information about the projected future distribution of SOs in the space environment for long prediction horizons.