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Assessment of access availability of space-ground optical links

Optical satellite communications play an increasingly important role in a number of space applications. However, if the system concept includes optical links to the surface of the Earth, the limited availability due to clouds and other atmospheric impacts need to be considered to give a reliable estimate of the system performance. An OGS network is required for increasing the availability to acceptable figures. In order to realistically estimate the performance and achievable throughput in various scenarios, a simulation tool has been developed under ESA contract.

Germany

12-037

DLR - German Aerospace...
Investigation of Active Detumbling Solutions for Debris Removal

The main objective of the GSP Study DETUMBLING –Investigation of Active Detumbling Solutions for Debris Removal - is to propose and investigate a contact-based de-tumbling strategy using a robot arm. Realistic models were developed for the chaser with robotic-arm, target and composite systems. Specific GNC strategies were developed for the different phases of the mission: robotic-arm deployment synchronization with the target de-tumbling the composite.

Spain

13-054

GMV
System impacts of propulsion Passivation

Propulsion passivation is most of the time feasible for running missions, using thrusters and existing AOCS modes, whatever the number of tanks and for both monopropellant and bipropellant systems.
For monopropellant systems the propulsion passivation may be:
-Partial for tank(s) with membrane. All the hydrazine under the membrane may be depleted but the pressurant gas above the membrane cannot be depleted. The final tank pressure is close to typically 5 bars at the end of mission.

France

13-060-b

Airbus Defence &...
Development of a dual-channel depolarization lidar technique for the derivation of CALIPSO/Aeolus/EarthCARE-related conversion factors

DEDICAtE, aims to the development of a dual-channel depolarization lidar technique for the derivation of CALIPSO/ADM-Aeolus/EarthCARE-related conversion factors. CALIPSO is capable of retrieving linear particle depolarization ratio at 532 nm in a global scale, providing this well- calibrated product since 2006. Future ESA missions EarthCARE and ADM-Aeolus are based on the employment of the High Spectral Resolution polarization-sensitive lidar technique at 355 nm.

Greece

13-043

NATIONAL OBSERVATORY OF...
Energetic Neutral Atom Imaging for Space Environment Monitoring

ENSEM investigates potential use of energetic neutral atoms (ENA) for space weather monitoring. ENAs are produced everywhere in the solar system due to the interaction between space plasma and ambient particles (neutrals and other plasma populations). Due to the neutrality, ENAs fly straight, keeping the information of the source plasma. Thus, ENAs are expected to visualize the plasma in a remote sensing manner.

Sweden

13-048

SWEDISH INST SPACE...
Application of the FAIR facility to space radiation research

The radiation environment in space has severely adverse effects on humans, electronics and materials. The most challenging part of the environment for our understanding of the effects are the highly charged highly energetic (HZE) particles. This study looks at the possibilities FAIR offers for space radiation research. There are two main parts: first the open issues and needed research in space radiation involving heavy ions of high energy and second the requirements a facility for this research should meet checked against the possibilities at FAIR.

Germany

13-S-02

Fraunhofer Gesellschaft
Ionospheric Sounding for Identification of Pre-seismic Activity

The INSPIRE project is dedicated to the study of physical processes and their effects in ionosphere which could be determined as earthquake precursors together with detailed description of the methodology of ionospheric pre-seismic anomalies definition.

Poland

12-135

Univ of Warmia and...
GNSS-R – Assessment of Requirements and Consolidation of Retrieval Algorithms (GARCA)

The main goals of the GARCA project are:

(1) To develop a tool capable to simulate GNSS-R data products for various instrument implementations using state-of-the-art techniques, including GEROS phase-A candidates, up to Level-1 observables and Level-2 geophysical data products, which will be freely and easily accessible to the interdisciplinary scientific GEROS community.

(2) To study the compliance of different GEROS implementations with respect to the Mission Requirements, and study the optimization of its geophysical data products.

Germany

14-M-6-1

German Research Center...
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
Geosounder Requirements Consolidation Study

The study relied on various state-of-the-art numerical tools (RT model, assimilation OSSE and NWP forecast systems) to explore the possible impact of a Geosounder mission on the retrieval of humidity and forecast. The study showcases that some specifications are valid for such an endeavor and some needs to be refined. Future works should be directed towards a more complex information content analysis with an all sky OSSE set up and maybe a multispectral/hyperspectral perspective on the channel selection.

France

13-075

CNRS

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