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Invitations To Tender

077 - Technological Enablers of Cellular Networks for PVT Assurance

Cellular networks have various built-in security features including access control, mutual authentication, and key management, which could be evolved to provide technological enablers for PVT assurance.  An efficient solution to protect from PVT spoofing is the use of symmetric cryptographic mechanisms to render the ranging signal unpredictable to the potential attacker.  The concept…

076 - Low SWAP optical clock control unit

The need for high-accuracy, resilient holdover techniques to be available in the event of GNSS signal denial has been widely emphasised. Whilst current microwave GNSS satellite clocks, and best-in-class commercial microwave clocks, provide holdover for relatively short periods in situations where GNSS system disciplining is lost, it is clear that future resilient PNT systems will need to maintain…

073 - Trusted PNT for Unmanned Aerial Systems

Urban Air Mobility is expected to become a reality in Europe within 3-5 years. The first commercial operations are expected to be the delivery of goods by drones and the transport of passengers, initially with a pilot on board. [1]  Satellite navigation systems and hybridisation with inertial sensors can provide high-accuracy uninterrupted solutions to UAS users (can be used for take-off and…

072 - Navigation Using Machine Learning Applied to Signals of Opportunity

There is an existing need to optimise navigation in challenging environments, such as deep urban or indoor, and to offer alternative PNT. For this purpose, the user may complement the GNSS with space-based (e.g. LEO SatCom) or terrestrial-based (e.g. cellular) signals of opportunity (SOOP) to optimise the PNT performance. SOOP could also be exploited similarly in a maritime…

071 - Technologies for Reliable Ambiguity Resolution (RAR) and Integrity in High Accuracy Positioning

High Accuracy requires usage of phase measurements, which are ambiguous measurements: ambiguities must be fixed to relate phase measurements to ranges.​ Phase Ambiguity Resolution is a stochastic process which needs a minimization search for the correct ambiguities which can require a very large search to find the correct solution: such a search is very time consuming, and the search space must…