DOCTOR - Display of Objects Circulating in Terrestrial Orbits
a small tool which visualize a Space Debris Population.

DOCTOR shows a representative space debris environment for objects larger than 1 cm in diameter. It is not a visualisation of the assumed reality, but rather provides a basic impression of the space debris enviroment. The different colors of the objects are part of a color code:
red -> operational payload
green -> Mission related debris
yellow -> rocket bodies
blue -> explosion fragments
white -> collision fragments
grey -> SRM slag particles
orange -> Multi-layer insulation