The objective of this project is to provide a basis upon which Galileo can be relied upon to the same extent that GPS is currently, especially by the Aviation user community and then beyond. It is proposed that DWI’s existing GNSS Performance Monitoring System (GPMS) is enhanced to include EGNSS and this platform can latterly include other constellations and augmentations for use beyond Europe. The project shall gather EGNSS signal data for analysis and comparison thereby providing the aviation community the confidence they need for including EGNSS within their planning for navigation. It will monitor new signals alongside the GPS signals and provide operationally relevant information to existing and new users of the GPMS. In addition, the system will be updated to include the capability for the monitoring of interference and spoofing.

The use of GNSS in space applications enables the main following applications: (a) navigation in space, (b) timing determination (c) precise orbit determination (d) attitude determination. Most of future space missions (LEO, MEO, GEO/IGSO orbits, interplanetary missions and launchers) are considering to adopt GNSS as baseline requirements for orbit determination or vehicle position and time estimation in space. In parallel, cost/size reduction, flexibility and the need to increase security are key requirements to sustain the evolution of the satellite business towards mega constellations and small satellites. ENSPACE (Enhanced Navigation in Space) captures this needs developing an innovative software application for enhanced space navigation, positioning and time. The aim is to: (a) become a reference product for low cost, secure and flexible space navigation, positioning and time, and (b) enable existing high grade space applications to enhance GNSS security. ENSPACE has the advantage to be multi application and multi mission, low cost, secure and robust, fully Software. The use of Galileo, and particularly the features of authentication, guarantees highly accurate positioning and robust navigation, not feasible so far with current GNSS. ENSPACE will be the future concept of space navigation and will test all possibilities of Galileo beyond the limits of the original service design.

Abstracts are not currently available in GtR for all funded research. This is normally because the abstract was not required at the time of proposal submission, but may be because it included sensitive information such as personal details.

Abstracts are not currently available in GtR for all funded research. This is normally because the abstract was not required at the time of proposal submission, but may be because it included sensitive information such as personal details.

Although GNSS systems now underpin a significant part of modern infrastructure, such as financial markets, telecoms, power generation and distribution as well as transport and emergency services, they suffer from a number of known vulnerabilities. One such shortcoming relates to an ionospheric disturbance known as scintillation. The phenomenon of scintillation is familiar to most people through the twinkling of star light as it crosses the atmosphere. Ionospheric scintillation causes amplitude and phase variations on signals from GNSS satellites when they cross the ionised upper atmosphere (the ionosphere). Currently, GNSS receivers are not robust against radio scintillation; effects range from degradation of positioning accuracy to the complete loss of signal tracking. During scintillation events, required levels of accuracy and continuity, as well as availability, may not be met, thus compromising commercial operations, such as maritime navigation, geophysical exploration and airplane navigation during airport precision approach. The project will quantify the problem of ionospheric scintillation over the forthcoming solar maximum (2010-2013) and develop algorithms to reduce the impact on the users. The research will lead to improved GNSS receiver design that will enable robust performance of receivers that are compromised by effects of the natural environment through ionospheric scintillation.