Space debris environment evolution model SDEM

The long-term evolution of space debris environment has been analyzed, taking into account a detail traffic model, explosions, collisions and the effects of air drag. Space debris environment analyzing software SDEAP has been developed based on evolutionary model. The modeling process and the flowchart of SDEAP are also depicted in this paper. BAU and NEX have been contrastively simulated in a 100 years span, the primary results show that spacecraft and rocket bodies passivation to avoid in-orbit explosions is a most efficiency measure to restrain the debris rapid growth. Of course, there are uncertainties in space debris environment modeling, so mathematical statistics is to be used to diminish the uncertainties in the subsequent working.