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The time-honored Rayleigh criterion specifies the mini- mum separation between two incoherent optical sources using a linear imaging system. As a matter of fact, it is the size of the point spread function that determines the resolution: two points closer than the PSF width will be difficult to resolve due to the substantial overlap of their images.
Until recently, this Rayleigh criterion has been consid- ered as a fundamental limit. Resolution can only be improved either by reducing the wavelength or by building higher numerical-aperture optics, thereby making the PSF
Palacký University
The technical objective of this study was to understand the net effect of using deorbiting technologies like sails or tethers over the future debris population around Earth. In principle, indeed, these attractive technologies will support the compliancy to post-mitigation disposal guidelines, for small missions. However, the increased cross section also increases the collision risk.
Politechnico di Milano
The main aspect of this study is to investigate the feasibility of the mission concept and the demonstration of the economic viability of a commercial payload delivery service to the Moon, as well as demonstrating the production of water/or oxygen with materials from the Moon. The study considered a payload delivery service that would be an end-to end service from Earth to a targeted location on the Moon, launched not later than 2025.
PTScientists
Recent trends in miniaturisation of space hardware combined with the provision of affordable and standardised spacecraft components and structures is opening up space to new players and is rapidly increasing the traffic into orbit.
Telespazio
There is increased attention being given to safeguarding Earth's orbital environment, as reflected by the number of relevant regulations that are being set forward by national governments and international organisations. Among others, ESA has published a Space Debris Mitigation Policy for Agency Projects (ESA/ADMIN/IPOL(2014)2), supported by the corresponding ESA Space Debris Mitigation Compliance Verification Guidelines (ESSB-HB-U-002).
Airbus Defence &...
Several studies have addressed the building of a lunar base either under ESA or other space agencies and entities. These studies have looked at conceptual designs, often of one specific element of the base, while most of the requirements are not adequately or not at all taken into consideration.
OHB System AG
The study and exploitation of In Situ Resource Utilisation (ISRU) technologies (with an initial focus on the Moon) are stimulating an increasing interest in the international community, both at Agency and industry levels, in view of and in preparation for future crewed exploration missions and in terms of scientific and societal long-term benefits.
Thales Alenia Space
The scope of this study was to investigate the possibility of designing a wireless power transfer system from the lander to the rover, based on laser technology, to:
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Avoid the use of nuclear power systems, such as the plutonium Multi Mission Radioisotope Thermoelectric Generator (MMRTG) accommodated onboard the NASA/JPL MSL Curiosity Rover, due to the constraints imposed by the use of radioactive materials
Leonardo
ALCHEMIST is a payload design created in order to produce water from lunar regolith so as to demonstrate the end-to-end process of hydrogen reduction of FeO on the lunar surface.
Space Applications
The ISRU-DM mission aims to perform the first demonstration of ISRU on the Moon, via the production of water or oxygen from raw lunar material (i.e. regolith, ice etc.) At Agency-level a phase-0 level study was also performed to understand the technical and programmatic feasibility of undertaking the ISRU-DM mission via the provision of commercial services from industry.
Surrey Satellite...
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