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An Innovative concept for the Risk Assessment of Geologic Hazards using GNSS and Solid Earth Tides Modelling

It is long debated whether a relation exists between the tidal stress produced by the Moon and the Sun on the Earth crust and the occurrence of difference geologic events, in particular large earthquakes and volcanic eruptions. Clear evidence for this relation has been elusive for a long time. However, the analysis of more complete global earthquake catalogues has shown that a significant…

Multi-layer PNT for SAR

Satellite Search and Rescue (SAR) standards are set and overseen by COSPASSARSAT. SAR instruments are currently flying on board MEO satellites in several GNSS constellations. These platforms complement the existing LEOSAR and GEOSAR satellites. Existing LEO/GEOSAR are slow in detecting an active beacon due to several limitations in design (limited satellites, fast orbits, no independent location…

PNT Timing & Synchronisation for Aviation Systems and Networks

GNSS is extensively used in aviation, notably for: positioning and timing for on board navigation purposes; timing and synchronisation for datalink communications (board to ground and viceversa); timing and synchronisation on ground for Surveillance, Air Traffic Control (ATC) and communication networks. GNSS time outages or unexpected anomalies may affect aviation systems and…

Machine-Learning to model GNSS systems

GNSS simulations are an important toolset supporting system engineering trade-offs and decisions. They are used to display and monitor key system performance indicators as well as study system behaviour, both through synthetic scenarios and real data replay. Industry and ESA currently use different tools to simulate GNSS systems, however often constrained to undertake only one of two different…

AI-enabled baseband algorithms for High Fidelity Measurements

Critical applications such as autonomous vehicles and machine control require high fidelity raw measurements in challenging environments. In spite of significant progress made in recent years, for those applications GNSS performance remains unsatisfactory in terms of reliability in challenging environments, therefore requiring improvement. The main challenges lie in handling transfer functions…

Advanced concept for chip-scale atomic clocks

Interest in compact and low power consumption atomic clocks (aka CSAC, Chip-Scale Atomic Clocks) have been progressively increasing in the last decade based on benefits demonstrated for a wide range of application, such as PNT in adverse environment (long coherent integration), secure telecommunication (frequency hopping) or in order to allow timing hold-over capability in case of loss of GNSS…

Precise Timing for Indoor Small Cells

GNSS signals are widely used for time synchronization purposes in many different application sectors, including telecom, finance and energy. Telecom service providers, in particular, consider GNSS-based synchronization well adapted to macro-cells whereas alternative synchronization technologies (e.g. wire-based solutions like Precise Time Protocol) are deemed more suitable for indoor small cells,…

Advanced Multi-Frequency Low-Cost High-Gain GNSS Antennas for next generation of Mass-Market Devices

Mass-market GNSS receivers, mostly installed in smartphones, use low cost antennas that need to be compatible with the communication antennas of these terminals. Typical antennas used in mobile phones are simple PIFAs (Planar Inverted-F Antennas) suitable for any constellation in L1 band, such as GPS/Galileo, GLONASS/Beidou. Their linear polarization (instead of circular) and low gain lead to…

Collaborative Processing of Distributed Receivers of Opportunity for Jamming and Spoofing Mitigation

The fast evolution of the Internet of Things (IoT), commercial Cloud platforms, and the future 5G standards are boosting development of new applications and technologies in the PNT field. Devices are expected to be increasingly connected to Internet in the next few years, storage and processing of data in the Cloud is already a reality, with 5G expected to bring very soon higher data rates and…

Precise positioning for mass-market: optimal data dissemination demonstrator

Until recently, RTK and PPP technologies have been developed for professional applications, the price not being affordable for mass-market users. Over the last couple of years, however, impressive breakthroughs have been witnessed for mass-market applications. While multi-band GNSS will provide an improved user experience in many consumer settings, the solution alone cannot deliver sufficiently…