The activity shall review current estimation techniques employed in space industry and make a analysis in the face of improvement, new demands and functionalities related to space applications in the view of high accuracy control demands ranging from science missions, exploration and vision based control to space transportation guidance navigation and control applications. The study shall execute the robust and high performance estimation and filtering techniques for accurate state reconstruction for hybrid integrated navigation purposes including vision based hybridisation.

Missions require more and more stringent stability performances, for which the performances of the reaction wheels become drivers.A recurrent issue is the wheel friction instability, resulting in fast variations of the wheel response, which adversely affects the pointing stability.This activity will:- examine the little understood effects of the lubrication system and environment on the stability and consistency of the delivered torque- characterise the impact of wheel instabilities on the pointing and stability- investigate solutions (at AOCS level, at wheel level, at system level, at HW o

Address the open points raised in COrDeT2: i) open points in final report, ii) integrate OBCP building block interface specification from parallel GSTP5 element 2 activities, iii) define unique meta-model of component model and add semantic description, iv) incorporate feedback from OBSW reference architecture consolidation activities (GSTP5 element 2 activities).Harmonize the OBSW reference architecture specification with the outcomes from IMA-SP activity by implementing the recommendations from SISTORA activity.

The SpaceWire physical layer as defined in ECSS-E-50-12A is a point to point cable connection. This is most suitable for the data link between equipment's. With the success of SpaceWire it is also used more and more to connect different boards within the same box. For this type of use typically a connection via the backplane would be used. So far there is no standardised solution for SpaceWire connections over the backplane defined. In this activity the different possible architectures of active and passive backplanes shall be traded-off.

An experienced AOCS contractor shall develop the generic requirements and framework for AOCS units modelling and together with some unit supplier(s) develop a first set of simulation models. The initiative will consider both functional models of adequate fidelity needed for AOCS system design, and interface-representative models for avionics verification on Virtual Test Bench. This contract should be followed by dedicated model developments with each unit supplier to produce and validate, against real unit tests, the models for their units.

The model based software engineering consists in expressing the software functional requirements with models. In order to get the requirements right as early as possible, system-software co-engineering is necessary, in this case avionics-software co-engineering, where the software functional models are placed consistently into an avionics model.The avionics model represents the physical architecture on which the software will run (deployment view).

Currently employed approaches to FDIR development are poorly phased with regard to the main Software Development activities. They have tendency of starting late, awaiting for the system Failure Mode Effects and Criticality Analysis (FMECA) data. If functional FMECA is sometimes available, its update into the physical FMECA is seldom ready for software development. FDIR definition is not adequately synchronised with the nominal Software System behaviour.

GRAVMOD-2 is a software tool developed by Astos Solutions and GMV for ESA.

It adds guidance analysis and on-board manoeuver capabilities to the gravitational modelling core of GRAVMOD-1 originally developed by DEIMOS. The unique mathematical models and architecture make it particularly suitable for the modelling of the gravity field of highly irregular bodies such as small moons, asteroids or comets. GRAVMOD-2 is composed of two main modules:

The OBCP-BB study has performed the following tasks: Assessment of current OBCP implementations for Space systems, considering both Application procedures (OBAPs) and Operation procedures (OBOPs), and providing some statistics figure about the OBCPs used in different ESA missions and projects Assessment of the ECSS-E-ST-70-01C standard particularly in the context of the specification of the OBCP software building block in the FSW Reference Architecture. The analysis has covered both the OBCP concept and the system capabilities defined by the ECSS standard.