The increase in the number of satellites in the Near Earth Orbit is exponential. The
consequent increase in pollution of the orbital environment is of growing concern to the …

The geostationary ring is an important resource of mankind used by various kinds of public
and commercial payloads. Due to the absence of major energy dissipating mechanisms, the …

The in-situ debris environment awareness system has been developed. The objective of the
system is to measure small debris (between 100 μm and several cm) in orbit. The orbital …

There are challenges associated with optical observations of Earth-orbiting objects that are
at, or near, the limit of detection using terrestrial space surveillance sensors. These …

Orbital debris with dimensions between 1 and 10 cm is an increasing threat to the Space
Station Freedom. A possible solution is to track the debris with a station-based radar and …

DEFUNCT SATELLITES, broken-up launch rockets, bags of rubbish and even satellites
containing human remains for'space burial'are hurtling above our heads in orbit. All these …

Kyushu University has initiated IDEA the project for in-situ debris environmental awareness.
This project aims at a prompt and clear understanding of the current and future micron-size …

Optical measurements of satellites are limited to times when the satellite is in sunlight, while
the ground is dark. For objects in low earth orbit (LEO), the observation time is limited to …

The primary data sources for analyses of the measured artificial Earth satellite population
are the US Space Command's Satellite File and Satellite Catalog. The accuracies …

During about 60 years of space activities, more than 5450 launches have turned into around
42000 tracked objects orbiting the Earth, of which about 23000 remain in space and are …