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_ Space Debris

Space debris modelling mainly consists of debris generation and orbit propagation. Debris generation can characterize and predict physical properties of fragments originating from explosions or collisions. Orbit propagation can characterize, track, and predict the behavior of individual or groups of space objects. With collision flux estimation, therefore, space debris modelling can build space debris evolutionary models as essential tools to predict the stability of the current or future space debris populations. Such future projections can provide information necessary to specify when and how to do for space debris mitigation and environmental remediation. Outcome of future projections would say that cleaning up space junks out there would be necessary for long-term sustainability of outer space activities as in the Japanese science fiction comics featuring space debris issues in 2075. Is it true? To figure out the right answer to the question we have to put more efforts into space debris modelling. Measurements are believed to be essential to properly conduct future projections because the stability may be subject to the initial population. Measurements are also essential to conjunction analysis to avoid accidental collisions and protection design to minimize damages due to impacts with submillimeter-size debris. Space debris modeling is also useful and effective to improve the efficiency of such measurements.

(Author: Toshiya HANADA)
Last-modified: 2016-02-18 (Thu) 13:43:13 (406d)