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The LightForce system, using ground-based lasers, can prevent over 85% of space debris collisions in Low Earth Orbit (LEO). Further simulations will assess its long-term impact on orbital debris evolution.

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Area of Science:

  • Space Engineering
  • Orbital Mechanics
  • Astrodynamics

Background:

  • Space debris poses a significant threat to operational satellites and future space missions.
  • Existing collision avoidance methods are limited in scope and effectiveness.
  • The LightForce system proposes a novel approach using ground-based lasers for active debris mitigation.

Purpose of the Study:

  • To analyze the short-term efficiency of the LightForce space debris collision avoidance scheme.
  • To develop and present a simulation methodology for assessing LightForce's long-term impact on the space debris environment.
  • To evaluate the potential of ground-based lasers in mitigating orbital collisions.

Main Methods:

  • Simulated a network of 20 kW lasers with adaptive optics for collision avoidance.
  • Utilized the Two Line Element (TLE) catalog for Low Earth Orbit (LEO) objects.
  • Performed all-on-all conjunction analysis over a one-year period, comparing baseline scenarios with LightForce active.
  • Developed a highly parallel simulation approach on the NASA Pleiades supercomputer.

Main Results:

  • The LightForce system demonstrated the capability to mitigate over 85% of conjunctions in the current debris environment.
  • The scheme has the potential to reduce the expected number of collisions in LEO by an order of magnitude.
  • Conjunctions involving massive objects remain a challenge, but mitigation of smaller objects is feasible.

Conclusions:

  • The LightForce system shows significant promise for short-term space debris collision avoidance.
  • Further research and simulation are necessary to fully understand its long-term effects on orbital debris evolution.
  • The proposed simulation approach provides a robust framework for evaluating active debris mitigation strategies.