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116 - Design of CRPAs for aviation and high-accuracy services
Jamming and spoofing of GNSS are a major concern. A controlled reception pattern antenna (CRPA) is one of the most powerful technologies to mitigate jamming and spoofing. As a result, it is attractive to start using CRPAs for several applications, including aviation and high-accuracy services. However, the use of a specific CRPA for specific applications requires a detailed evaluation of the…
109 - 5G Localisation for Safety of Life Applications in Rail
Safe Localisation of railway vehicles is necessary to allow train control systems to operate. Today this is done within the European Train Control System (ETCS) by using fixed location tags called Eurobalises and odometry sensors.
While Eurobalises typically are safe, fairly accurate and robust, they impose high costs for installation and maintenance on the infrastructure operator and only…
105 - Hybrid black-white-modelling estimation and machine learning algorithms for PNT engines
The application of machine learning (based on “black-box” modelling) is of interest in problems that are difficult to solve based on traditional (optimal) estimators for simple models (“white-box” modelling). Black-box modelling is difficult to be explained and understood (i.e., difficult to understand what to expect in unknown or new situations), involve high computation complexity, and…
103 - Precise and Stable Navigation with Quantum Accelerometer
Navigation systems that rely on Inertial Sensors are prone to drift and inaccuracies over time, affecting their accuracy, reliability, and autonomy, particularly in challenging scenarios where GNSS signals and/or external reference points availability is limited or strongly impacted.
Quantum accelerometers enable high-precision navigation with long autonomy, effective fault detection in case of…
101 - Underwater and underground navigation using Muons
When cosmic rays reach the upper part of the Earth’s atmosphere, several particles are created, including muons. Muons, elementary particles with the same charge of the electron but with bigger mass, can travel through any kind of material, including water and rock. A muon detector can be very small and very low cost (~ $100). Muons can be used for navigation using Reference Detectors (to…
079 - Reduced size Antenna for Earth Pulsar navigation
Pulsar are rapidly rotating neutron stars emitting beams of radiation periodically, some with very high stability.
Since every pulsar has a different frequency, they can be used in a navigation system like beacons, and in timing (see EL1-006).
Emission occurs in all spectrum (infrared, visible, RF, X-ray). For space navigation, detectors in X-ray are preferred for their size, but detectors…