GreenOPS current activities
In this page are listed the on-going activities in the frame of GreenOPS together with a short description.
Fragmentation Consequence Analysis for LEO and GEO orbits
GSP is assessing through two parallel studies the environmental and thus operational impact of potential additional debris releases in the most populated space regions: LEO and GEO. The risk of in orbit collision in these regions is particularly high and the studies are reviewing the existent fragmentation models and running long-term simulations in order to quantify the criticality of spacecraft break ups in these regions.
Disposal strategies analysis for MEO orbits
Medium Earth Orbits (MEO) are very important for sensitive applications like positioning systems. These orbits are unfortunately characterized by the absence of any natural sink mechanism. The consortia in charge of these studies are running long-term evolution analyses in order to define the optimal disposal strategies for satellites reaching their end-of-life.
End-of-Life disposal concepts for missions Lagrange points and high-elliptical orbits (HEO) missions
Long-term natural orbital perturbations (e.g. like the Sun and Moon’s gravity, solar radiation pressure, etc.) acting on spacecraft orbiting in HEO and around Lagrange points can make them cross protected regions or even re-enter through the Earth’s atmosphere. Two parallel studies have the objective of defying mitigation strategies to optimally dispose (in terms of costs and safety) satellites at the end of their missions. The studies will help define new policies to preserve these very important regions that are used for scientific, remote sensing and telecommunications purposes.
Simplified models for spacecraft vulnerability assessments in early design phases
Objects in space are exposed to several impacts of man-made object during their lifetime hence the health of payloads and bus functionality are not guaranteed. Two consortia are developing tools that will enable to take into consideration spacecraft vulnerability aspects already in the preliminary design phases of a spacecraft. These tools are designed for use in the Concurrent Design Facility (CDF) in ESTEC.
Simplified models for aerothermodynamics analysis of spacecraft components
The GSP is carrying on this industrial study with the aim of developing a tool to estimate re-entry fragmentation and demise in preliminary design phases. In particular these models are being designed for use in ESTEC Concurrent Design Facility (CDF).
Last update: 15 January 2014