SPACE DEBRIS CHASER CONSTELLATION

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2 THE VISION

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5 SPACE DEBRIS CHASER CONSTELLATION

6 Constellation management Application to SSO debris Inclination between 98 and 99.5 Altitude between 750 km and 850 km Constellation of 38 Cubesats Low-thrust orbit transfer with optimized domains 1075 removed debris Global formula 1937 removed debris Approximate formula provides a fair order of magnitude

7 SPACE DEBRIS PROTOTYPE

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9 le

10 COLLISION RISK ON LINE SERVICE

11 SHARE MY SPACE Space debris recycling and management INDEMN 1.0 INtelligent DEbris MaNagement Long-term risk prediction software for space debris collision based on statistical models. The program was made to help satellite operators to take into account the risk related to on-orbit space debris collision when planning the missions of their satellites. INDEMN 1.0 features a library for input and output visualization. The statistical model includes: Source terms for the generation of space debris: On-orbit collisions Pressure tank explosions System failures Space situation data loading And mitigation terms: Atmospheric drag Atmospheric re-entry The distribution of space objects at a given date is provided as an input. Several databases are included in the program such as the US Air Force space-track data bases and the NASA NSSDCA catalogue. All the space situation scenarios such as mega-constellation deployment can be implemented as an input to the code. The density of space debris is computed for various altitudes and a statistical model is able to compute the evolution of the probability of collision for a given spacecraft in time. The simulation tool was validated with ESA s finest Monte-Carlo codes and it has the great advantage to run at very low computational cost, so that many different scenarios can be easily tested. Simulated time Number of objects by default Accuracy in altitude Range of altitude Collision uncertainty Coding language Code characteristics 2 month to 50 years > km km (LEO) < 5% per year Python Density projection X years Model computation SHARE MY SPACE 17 rue Burnouf Paris, FRANCE Tel.: postmaster@sharemyspace.global Website:

12 Space Debris Laser Mapping

13 TODAY TOMORROW SPACE TRAFIC CONTROL «ONLY» catalogued debris (>10cm) Position accuracy: 100m, No shape information, No weight, No movement (only size) No trafic information of control while the debris and satellite population increase Thousands of collisions warning per day for operators 5% per year of collision risks for satellites useless maneuvers catalogued objects ( >1cm) Position accuracy: 1m, Shape information, Weight, Mouvement Creation of space trafic control suitable for the increasing population Limited number of warning per day 1% per year of collision risks for satellites ONLY USEFUL maneuvers

14 TECHONOLGIES: LASER DETECTION FROM GROUND Changchun Space Debris Laser Ranging FROM SPACE Fraunhofer NASA DLR Polytechnique: XCAN

15 SDLM constellation 450 CAN-sat constellation (with 100km range) Same circular orbit Target debris: 663 km < h < 837 km > 1 cm Double detection at each orbit (1h30) 1 cm precision Orbit propagation 100 km Localization within 1 m < 87 km

16 THANK YOU