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230 results found
Reliable TT&C during superior solar conjunctions

The study aims at investigating technical solutions to design a reliable TT&C system during superior solar conjunctions, to mitigate the detrimental effects of phase and amplitude scintillation, which limit the maneuvers under 5 deg of Sun- Earth-Probe (SEP) angle. After the analysis of data acquired during superior solar conjunctions of Mars Express (MEX) in 2013-2015 and Cassini in 2001-2002, that allowed deriving a mathematical model to be used in the simulations, the current ESA TT&C system has been evaluated, in terms of link performance.

Italy

13-028-b

Arpsoft
Feasibility of ultra low thrust transfers in L1, L2, Sun, Earth & Moon Systems

The number of spacecraft flying in highly nonlinear gravitational fields is largely increased during the last few decades, and probes orbiting in Lissajous or Halo orbits can be found around both the Lagrangian Points L1 and L2 of the Sun-Earth&Moon system.

Italy

15/723-b

POLITECNICO DI MILANO
Solar Rectennas – Nanosized Rectenna for Solar Cells

Motivation:
To provide a proof-of-concept demonstration of light rectification in a nano-rectenna as an alternative energy conversation process to semiconductor solar cells based on the photovoltaic effect. For space this alternative energy conversion process could enable applications under different environmental conditions (e.g. temperature ranges, radiation) and offer the advantage of higher theoretical conversion efficiency.
Methodology:
To provide a proof-of-concept demonstration of rectennas working at high frequencies through the development of:

Italy

15/713-a

Fondazione Istituto...
Design for Removal: How to design S/C to support active debris removal if uncontrolled

In the future, satellites will have to demonstrate compliance with debris mitigation requirements, covering re-entry or parking graveyard orbits and passivation. Nevertheless, during the mission, a failure could occur without any possibility to manoeuvre the satellite and achieving its compliance to the Space Debris Mitigation requirements. Therefore to anticipate the need to use ADR for deorbiting (or reorbiting) the satellite, it is interesting to evaluate the implication of adapting the satellites and launcher upper stage to support a future ADR mission.

Italy

15/705-b

Thales Alenia Space
Assessment of onboard DA state estimation for spacecraft relative navigation

The goal of this study is two-fold. First, to identify and develop a DA- based high-order filter for relative pose estimation. The application considered is the rendezvous with an uncooperative target, modelled after ESA's e.deorbit mission. Secondly, the DA algorithms are implemented on hardware mimicking the limited computational power available in space. The resulting implementation is tested in a processor in the loop (PIL) test-bench using the approach phase of the chaser to the uncooperative target to be estimated.

Italy

16/R03

POLITECNICO DI MILANO
Characterization of equatorial Ionospheric Anomaly in the African region (IONAF)

The objective of the IONAF project is to characterize the ionospheric electron density distribution and its variability in the area of the Equatorial Ionospheric Anomaly (EIA) over the African region, using GNSS derived Total electron content (TEC) and other available ionospheric data.

Italy

14-A-1-6

ICTP
PERSEO: PErsonal Radiation Shielding for intErplanetary missiOns

The PERSEO project (PErsonal Radiation Shielding for intErplaetary missiOns) aimed at
studying a wearable innovative radiation protection system to mitigate the effects of
Solar Particle Events (SPE) on astronauts. SPE can be considered as related mainly to
deterministic effects of the cosmic radiation, with hazards to man arising for physical
doses above 2 Gy, when symptoms of the hematopoietic syndrome appear.

Italy

14-S-06

Univ of Pavia
PHOTON-ENHANCED THERMIONIC EMISSION

Motivation:
To investigate the combination of thermal and photovoltaic effects towards an high efficient photo-to-energy conversion device.
Methodology:
We used numerical simulations based on FEM technique. In particular, we addressed the charge cloud issue in a fully 3D fashion to be able to design and simulate devices as close as possible to reality.
After initial tests based on analytical and 1D numerical techniques, we moved to the 3D device where we investigated the role of cathode-anode

Italy

13-065

Istituto Fondazione...
SAOCOM-CS bi-static modes for land applications

The project summarized here was conceived to support the definition of applications, products and user requirements, as well as the hardware design and ground processing design of a companion satellite mission which will carry aboard a "passive" radar working in tandem with the Argentinian L-band radar developed by CONAE and denoted as SAOCOM. The primary objective (i.e., science driver) of the SAOCOM companion satellite mission (SAOCOM-CS) is forest tomography, which will be carried out by exploiting small baselines between active and passive systems (order of km) changing with time.

Italy

13-076

UNIV ROMA LA SAPIENZA
Small Mars Satellite

The activities carried out in the phase 0 deal with the mission concept and, in particular, with the interplanetary analysis and contributions to the mission requirements. The activities can be summarized as follows:
- study of the state of the art of Mars landers, with focus on issues such as the launcher, the interplanetary trajectory, the type of planetary approach, the design of the spacecraft, the layout, the mass and power budgets, the aerodynamic parameters, the entry, descent & landing strategy;

Italy

15/714

Ali SCARL

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