A considerable portion of near-Earth objects could have come from the trans-Neptunian belt. Some of them have aphelia deep inside Jupiter’s orbit during more than 1 Myr.

We use a simplified calculation to demonstrate the equivalence between three different methods for calculating transition line strengths. These calculations demonstrate the complex interplay between spin-orbit and correlation contributions to two-photon transitions in rare-earth ions.

The possible advantages of employing multiple agents to manage activities on a single space system are largely unexplored. This paper presents the experimental validation of a multiagent scheduler for a low Earth orbit satellite.

The capture and recovery of an expensive satellite that has lost its attitude control function can be an important class of future missions for space robots. Moreover, there are tens of thousands of pieces of debris in orbit from previous missions. These orbiting debris such as the uncontrolled pieces of booster stages and obsolete satellites are a serious hazard to future orbiting spacecrafts....

Low Earth Orbit (LEO) satellite networks will play an important role in the evolving information infrastructure. Satellites in the low earth orbits provide communication with shorter end-to-end delays and efficient frequency usage. However, some problems need to be solved before LEO satellite systems can be successfully deployed. One of these problems is the handover management. The objective o...

The Multi-angle Imaging SpectroRadiometer, one of five science instruments aboard NASA’s Terra spacecraft, was launched into earth orbit in December 1999. Acquisition of earth imagery began in February 2000, and the quality of the data is excellent. Overall, MISR has been performing superbly, though the instrument exhibits several idiosyncrasies, some of which were anticipated prior to launch. ...

The optimization problem for a 6DOF satellite equipped with constant specific impulse thrusters is addressed in terms of fuel consumption. The vehicle is assumed to move in Low Earth Orbit: the Keplerian motion around the Earth is perturbed both by the molecular air impingement (aerodynamic drag) and by the gravitational field disturbance known as J2 effect. Further results are achieved by simp...

Since 2011, massive stranding of the brown algae Sargassum has regularly affected coastal waters West Caribbean, Brazil, and Africa, leading to heavy environmental socio-economic impacts. Ocean color remote sensing observations as performed by sun-synchronous satellite sensors such MODIS (NASA), MERIS (ESA), or OLCI (ESA/Copernicus) are used provide quantitative assessments coverage through cal...