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Disposal strategies analysis for MEO orbits

The Medium Earth Orbit (MEO) region, home of the operational Global Navigation Satellite Systems (GNSS) GPS and Glonass, is becoming more and more exploited with the advent of the European Galileo and the Chinese Beidou constellations, both in their build-up phase. The sensitive applications of the navigation satellites and the absence of any natural sink mechanism, such as the atmospheric drag, call for a careful debris prevention policy able to preserve the MEO environment, avoiding in the future the problems now already faced by the LEO and the Geostationary Orbit (GEO) environments.

Italy

12-604-01

IFAC-CNR
Simplified models for aerothermodynamics analysis of space craft components: "design for demise"

Thousands of man-made objects are currently in orbit around the Earth. These range from active satellites to flecks of paint, via spent rocket stages and fragments of satellite debris. Due to the drag of the very thin high altitude atmosphere, these objects have slowly decaying orbits, and will eventually re-enter the Earth's thicker, lower atmosphere. Most will be destroyed on entry due to the aerothermal heating experienced at hypersonic velocities at altitudes between 40 and 80km. However, some objects reach the ground.

UK

12-605

FLUID GRAVITY...
BOdies UNder Connected Elastic Dynamics (BOUNCED)

The BOUNCED project has assessed the behaviour of elastic tethers within flexible link Active Debris Removal (ADR) systems. This has been achieved by solving a multidimensional set of linear equations, through the separation of dynamic modes; and the construction of analytic and numeric models of the resulting system. These models can be used to simulate the behaviour of both single and multi material tethers across the full lifetime of a tether mission, from pretension, through re-entry burn and free body motion post burn, to re-entry.

UK

13-090

Belstead Research Ltd.
End-of-Life Disposal Concepts for Lagrange-Points and HEO Missions

The awareness of the risk of uncontrolled accumulation of man-­‐made objects became significant in the late 70's and since then, a number of space debris mitigation guidelines have been published by various organizations. The general aim is to reduce the growth of space debris by ensuring that space systems are designed, operated, and disposed in a manner that prevents them from generating debris throughout their lifetime, assuring the sustainable space utilization.

Italy

12-602

Dinamica
Mission analysis and detailed GNC definition in support of PRISMA “IRIDES” experiment

The Swedish PRISMA IRIDES experiment (Iterative Reduction of Inspection Distance with Embedded Safety) encompassed the transfer of the PRISMA MANGO spacecraft to the non-operational and un-prepared CNES PICARD spacecraft with close range rendezvous and inspection. The rendezvous and inspection phases were intended to be performed by on-ground calculated deltaV manoeuvers based on the available relative-navigation data.

Sweden

13/703

OHB Sweden

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