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Betti M.,Rhea System SA | Betti M.,Earth Observation Directorate
SpaceOps 2010 Conference | Year: 2010

This paper describes MSR (Multi-Mission Scheduler and Reporter) as a centralized, OS (Operative System) independent, web-based framework developed by RHEA, aiming to be a highly customizable system addressing the many different issues related to Satellite Control Center (SCC) operations management. As a matter of fact, it represents one of very few examples of available frameworks offering a complete suite of tools addressing the multifaceted aspects of satellite mission operations, such as schedule preparation, activity logbook maintenance, report compilation, mission documentation management and task execution monitoring. Multiple missions and spacecrafts can be seamlessly operated at the same time, where all actors involved in SCC operations can be assigned one or multiple profiles with access to well-defined functionalities. © 2010 by Rhea System S.A. Published by the American Institute of Aeronautics and Astronautics, Inc. Source


Reid S.,Rhea System SA | Pearson S.,Rhea System SA
SpaceOps 2012 Conference | Year: 2012

RHEA recently led a consortium of companies on a project for the European Technology Harmonisation Steering Board for Ground Software Systems (THSB). The project consolidated a number of related activities to construct a coherent Reference Architecture (RA) model representing a best practice design for a satellite operations ground segment. The RA also covers related aspects of the satellite manufacturing process. The RA model was initially developed according to CCSDS RASDS / RM-ODP methods and is implemented in UML using the Enterprise Architect (EA) modelling tool. Its principal deliverable is a set of ground segment interface control documents (ICDs) representing the services offered between a Monitoring and Control System (M&C), a Mission Planning System (MPS) and a Flight Dynamics System (FDS). These ICDs will be submitted to ECSS for consideration as guidebooks for the specification of ground segment interfaces. A key aspect of this work was to align the RA with relevant and emerging standards: the ECSS Space System Model (SSM) E31 [ref1] and the CCSDS Mission Operations (MO) standards [ref5] [ref6]. The RA ICDs are defined in terms of CCSDS services. At the top level are the CCSDS MO functional services [ref7]. These reference the CCSDS Common Object Model (COM) [ref3] which sits on top of the CCSDS Message Abstraction Layer (MAL) [ref4], which itself is independent of any chosen message transport implementation. The messages are instantiations of E31's Activities, Reporting Data and Events. Reference architectures for the Operational Control System (OCS) and Electrical Ground Segment Equipment (EGSE) had evolved independently, even though a commonality in functionality is universally recognised. The updated RA has therefore converged on a 'common core' of services for both environments. It is hoped that this architecture will prove a useful reference for future activities such as the European Ground Segment Common Core initiative (EGS-CC). An important aspect of the project is the automatic generation of written documents and data schemas directly from the RA model. These are now auto-generated via macros stored within the EA project file. XML schemas for the M&C, FDS and MPS service messages are generated in a single operation. ©2012 by Rhea System s.a. Source


Reid S.,Rhea System SA | Pearson S.,Rhea System SA
SpaceOps 2010 Conference | Year: 2010

Automated Operations for Space and Ground Equipment are traditionally supported by scripting languages. The same is true for test systems used in satellite manufacture. This presents a challenge when performing tasks such as Coordinating operational information between teams or organizations, transitioning spacecraft operations from a legacy control system to a new one, or adding automation to an existing, manual based mission. MOIS is a common tool for the preparation and execution of operational satellite procedures. It is also used widely by Satellite Prime Contractors in support of Assembly, Integration and Test (AIT) of the Spacecraft. MOIS achieves its flexibility through the use of a generic procedure model, which offers a number of distinct advantages compared with any text based language. Rhea is currently leading a project on behalf of the European Technology European Technology Harmonisation Steering Board for Ground Software Systems. The purpose of the project is to investigate harmonization in the interfaces of Command Procedure Execution (CPE) systems. It is proposed to develop a 'harmonised' procedure model, accounting for a range of existing & emerging relevant standards from ECSS, CCSDS and OMG. © 2010 by Rhea System S.A. Source


Lawrence G.,Rhea System SA | Reid S.,Rhea System SA | Kruglanski M.,Belgian Institute for Space Aeronomy
SpaceOps 2010 Conference | Year: 2010

ESA's Space Environment Information System (SPENVIS) is a system of models of the space environment and its effects on materials (e.g. spacecraft). It covers the natural radiation belts, solar energetic particles, cosmic rays, plasmas, and micro-particles. SPENVIS currently integrates 35 distinct models, with new ones being added regularly. The underlying models arise from many years of research, supported by national and international space agencies, resulting in a variety of tools to investigate the Sun-Earth connection and near-earth environment. SPENVIS was originally developed as a browserbased research tool that collects these tools together, being capable of recreating the full range of conditions in most of the solar system. In recent years SPENVIS has been further developed into an Operational System. In addition to enhancing the modeling capabilities, this required an enhancement to the customer perspective, i.e. ease-of-use, consistency, stability, runtime, support, etc. SPENVIS is now available as a web-based or standalone application. As a Spacecraft Operational Support System, SPENVIS is further tailored to preferentially reproduce the current radiation environment for a range of common LEO, MEO and GEO orbits, and predict likely future variability and effects via a purpose designed user interface. It will also accept autonomous input data regarding the real-time space environment via a variety of ISES-standard alerts and reports. This paper presents the latest developments, with particular significance for the satellite operations community. © 2010 by RHEA System SA. Published by the American Institute of Aeronautics and Astronautics, Inc. Source


Fritz M.,University of Stuttgart | Falke A.,Airbus | Kuwahara T.,University of Stuttgart | Roeser H.-P.,University of Stuttgart | And 3 more authors.
Acta Astronautica | Year: 2010

The Institute of Space Systems at the University of Stuttgart has a small satellite programme consisting of currently four missions. The first of these missions is the Flying Laptop, the purpose of which are technology evaluation, Earth observation and scientific measurement. Since the budget for a University satellite programme is obviously limited, engineering models of the entire spacecraft are to be avoided. In order to keep technical risks at a low level, a simulation based development approach was selected instead which already has been applied as proven technology in industry. The Institute of Space Systems applies the system simulation infrastructure Model-based Development and Verification Environment (MDVE) developed by Astrium as real-time simulator which is commanded via a SCOS-2000 mission control system. Easy commanding of such an entire simulated S/C, respectively, later the hardware in AIT phase, is mandatory especially for students only working with the equipment for a typical 6 months thesis period. Therefore the infrastructure setup was completed by the test procedure editor and execution engine Manufacturing and Operations Information System (MOIS) which for the first time provides a complete command/execution/control chain in the programme. © 2009 Elsevier Ltd. All rights reserved. Source

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