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Current Projects E - K
EGNOS (European Geostationary Navigation Overlay Service) V3 definition phase (phase A activity) encompasses challenging and ambitious objectives paving the way for Europe to play a leading role in global navigation satellite systems (GNSS) for the post 2020 period.
Real Time Services for Maritime Safety and Security 2 (EMS 2)
The project EMS 2 is a part of the joint project “R&D and Real Time Services for maritime Safety and Security”. The project is embedded into the bunch the institutional forces and interdisciplinary completion of research and development activities of the DLR within the maritime domain. The sub-project „Terrestrial and space-based maritime Navigation and Communication“ of the Institute of Communications and Navigation is following the aim to investigate the reliability and protection of navigation and communication systems and to develop new and robust algorithms and techniques to improve it.
EECNS - Essential and Efficient Communication Navigation and Surveillance Integrated System
Communications, Navigation and Surveillance (CNS) systems provide the invisible and often unappreciated infrastructure which is essential for Air Traffic Management. CNS enables efficient navigation and safe separation in all phases of flight. The SESAR Concept of Operations aims to dramatically increase the exchange of information between airspace users, air traffic control and flow management. This is expected to improve the quality of service to the travelling public, whilst reducing cost and environmental impact. Although current CNS systems are mature and generally providing a good service, they have not yet fully transitioned from analog to digital technologies. Such a shift is needed to meet the challenges of the coming years; to accommodate higher levels of traffic and improve operational efficiency. Many CNS technologies have been developed in a modular fashion. As a result a transition to network thinking is needed to overcome the inefficiencies of fragmented services whilst supporting local needs. Building on the experience of SESAR1, the EECNS will develop an integrated suite of CNS solutions to meet the operational requirements of the ATM system in the short, medium and long term, with technologies that are consistent with the European ATM Master Plan and the ICAO Global Air Navigation Plan.
The purpose of the activity is to study, develop and validate key technologies for a baseband modem prototype for an M2M/SCADA terminal for star network applications, particularly focusing on fixed assets applications, and exploiting the full capabilities offered by DVB-RCS2 specifications. The task will be accomplished by building a demonstrator implementing a complete end-to-end system, including a realistic channel emulator. The project is split in two phases: Phase 1 will be focused on system scenarios and cost analysis, to determine the advantages of the proposed solution; Phase 2 the demonstrator will be designed developed and tested in laboratory environment.
ESC-IW - Definition and Development of the Expert Service Centre Ionospheric Weather
Within the Space Situation Awareness (SSA) programme, ESA is currently developing a Space Weather (SWE) Network consisting of five Expert Service Centres (ESC), the SSA SWE Coordination Centre (SSCC) and the SWE Data Centre. The Expert Service Centre Ionospheric Weather (I-ESC) will be coordinated by DLR. The mission of the I-ESC is to provide and develop the functionalities, capabilities and expertise in the domain of the ionosphere and upper atmosphere weather that are needed within the ESA SSA SWE Network to achieve as a collaborative enterprise its mission of demonstrating and assessing the influences of Space Weather and informing and supporting end-users through the provision of accurate, reliable and timely products and (pre-) operational services, tailored to their requirements.
Future navigation services provided by upcoming satellite systems like Galileo will require corresponding improvements of the receiving systems. Particularly, interference and multipath signals may cause a significant degradation of the performance and thus make it impossible, to obtain exact and reliable positioning data. These restrictions and uncertainties cannot be tolerated for Safety-of-Life (SoL) applications e.g. in aeronautics and shipping. In order to overcome this problem, adaptively steered antenna arrays are employed, which enable the use of new beamforming and signal processing algorithms. They provide a more exact and reliable navigation solution, by suppressing interferences and multipath signals and improving the reception of the information signal from the direction of the satellite.
The acronym Galileo SMF ist standing for Signal Monitoring Facility for Galileo FOC Phase. To the beginning of 2011 the institute was mandated to provide a measurement and analysis service in cooperation with the GSOC for the Galileo FOC satellites. Aim of the project is to provide the European Commission represented by European Space Agency and their industry partners (Thales Alenia Space) an independent possibility for measurement of the Signal-in-Space (SIS) of the Galileo satellites after their launch and the In-Orbit Test (IOT) phase.
Die bodengebundene direkte Übertragung von Steuerbefehlen zu und Telemetrie-/Sensordaten von niedrigfliegenden (LEO) Satelliten oder Unmanned Aerial Systems (UAS) schränkt die Kontaktzeiten bzw. den Aktionsradius dieser Systeme erheblich ein. Für einen geostationären Relaissatelliten hingegen ist knapp die halbe Erde sichtbar. Mit einer einzigen, eventuell durch Redundanz gesicherten, Bodenstation sind über das Datenrelais erheblich längere Kontaktzeiten zu einer ganzen Flotte von LEOs oder UASs möglich. Im Rahmen des GeReLEO-MODULOS Projekts wurden vom DLR-Institut für Kommunikation und Navigation die hierfür benötigten Protokollschichten zur Realisierung der kanaladaptiven Ka-Band-Übertragungs- und Zugriffsverfahren (Data Link Layer, Media Access Control, Ressourcenmanagement etc.) entwickelt. Beiträge der Projektpartner waren der Bau des Engineering Model (EM) eines LEO-Satellitenmodems sowie der Bodenstationsmodems.
GUIDE - Ground Based Augmentation System
In the project „GBAS Guided Departures“ (GUIDE) the extension of the Ground Based Augmentation System (GBAS) from a landing system to a navigation system also supporting guided precision departures is studied. On the technological side, the GBAS service will be extended from augmenting only the US GPS constellation to supporting multiple constellations and two navigation frequencies. On the operational side, the necessary procedures and interfaces are developed in order to reduce operational restrictions while maintaining the extremely high level of safety. This enhances existing GBAS to a highly flexible navigation system for fuel and noise optimized operations at and near an airport. It supports the institute’s mission “Safe and Efficient Traffic”.
HEIMDALL – Multi-Hazard Cooperative Management Tool for Data Exchange, Response Planning and Scenario Building
The EU H2020 project HEIMDALL aims at enhancing the response capabilities to disasters of society as a whole. Thus 14 European partners from academia, research insitutions, industry, authorities, and emergency response organizations join forces to develop and demonstrate a modular, flexible and scalable architecture that provides key stakeholders with relevant tools to process the available data and improve preparedness of societies in relation to emergency management, thus enhancing response capacity of society as a whole. The basic element of the HEIMDALL architecture is the Integrated Service Platform (SP)/ Local Unit (Figure 1), offered to each individual authority for response planning and scenario building. Furthermore, multiple instances of the platform can be interconnected in a federated scenario to facilitate cooperation.
HIPERON-T - High Performance Optical Network Transceiver for stratospheric data highways
Free space optical (FSO) communications are a promising alternative for bandwidth hungry applications. FSO applications include bridges between base stations of a cellular network, integration of multi-site networks and as a high speed/capacity back up alternative link for sudden and unexpected events. Moreover, FSO systems offer a tap-free communication channel, a rapid deployment with no need for costly interventions and a license free spectrum.
Low-Earth-orbit (LEO) satellites require both data links for telemetry, tracking and command (TT&C) and for download of mission data (e.g., Earth observation). A single ground station can maintain a contact to a passing LEO satellite for relatively short time only (typically ~10 min), and together with high-resolution sensor systems onboard the satellites producing high amounts of data this leads to a serious bottleneck. In fact, depending on the actual orbit parameters (altitude and inclination) the long-term average visibility as seen from one ground station is only 1% to 6% of the overall orbit time.
Ionosphere Monitoring and Prediction Center (IMPC)
The performance of radio systems used in space based communication, navigation and remote sensing is affected by the ionospheric variability. Moreover, ionospheric disturbances caused by space weather effects may degrade the accuracy, reliability and availability of Global Navigation Satellite Systems (GNSS), such as GPS and the future civilian European system Galileo. The Ionosphere Monitoring and Prediction Center (IMPC) of DLR provides a near real-time information and data service on the current state of the ionosphere, related forecasts and warnings.
Accelerometer measurements are used in two major topics in Earth observations, namely gravity field recovery and thermosphere studies. We have shown that the thermospheric signatures in the GOCE gravity gradients are due to an unexpected quadratic response of the instruments to the accelerations acting on the satellite. A hypothesis has been worked out, implying the fact that the quadratic factor and other disturbances seen on the accelerometers are coupled together. This hypothesis will be evaluated further, strengthened in experiments and the impact on gravity field recovery as well as thermosphere and ionosphere studied. For gravity field this means an improvement of the GOCE satellite only gravity field by reducing the noise in the gradients and recalibrating the gradiometer. For the Swarm satellite mission, this means an enhancement of the scientific outcome of the accelerometer data by studying high amplitude signals in times of ionospheric storms. An elaborated data processing schema is necessary to make use of these instruments, so an uncertainty estimation procedure will we established evaluating the quality of the retrieved neutral density. Assimilating the neutral density into a physical based ionosphere-thermosphere coupling model the dynamics in the ionosphere at times of storms can be studied. As validation is very important a validation concept is worked out. Therefore, an empirical ionosphere model is enlarged further.
Projects A - D
Projects E - K
Projects L - Q
Projects R - Z
Completed Projects 2011-2017
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