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Proof of concept of hybrid 5G-NR/GNSS Positioning with ad-hoc overlay
GNSS has become the corner stone of worldwide positioning applications, and in particular for those requiring high-accuracy. The outstanding performances in open sky and very competitive performances in degraded environments of GNSS are widely acknowledged, but also the need to complement GNSS by other technologies to address specific needs in challenging environments.
In this context, 5G…
Emits link: http://emits.sso.esa.int/emits/owa/emits.main
User Antenna Diversity for efficient multipath mitigation
The impact of multipath and fading in harsh propagation conditions is still among the main sources of errors in PNT solutions for mobile users. Besides code-based positioning accuracy, they affect convergence time of carrier-based solutions (e.g. PPP) and may prevent ambiguity resolution. For handheld user equipment (HH-UE) such as smartphones and tablets, antenna performance is traded against…
Emits link: http://emits.sso.esa.int/emits/owa/emits.main
Combining ELF signals with GNSS for improved PNT
The need for a robust PNT to complement or back up GNSS in critical infrastructure/critical application is widely acknowledged. This translates into actions taken by stakeholders to further raise awareness (e.g. radio navigation plans in the US and Europe) and for some, pave the way towards some deployment (e.g. recent Request for Information initiated by the US Department of Transport for a…
Emits link: http://emits.sso.esa.int/emits/owa/emits.main
Hollow Corner Cube Retro-Reflectors In-Orbit PNT
Optical solid Corner Cube Retro-reflector (CCR) arrays are often implemented to allow laser tracking of satellites from ground. In order to achieve a measurable return signal, such arrays are typically rather large, and as conventional corner cubes are made of glass, the arrays are typically high in mass. However, in recent years, interest has grown in using hollow corner cubes for space…
Emits link: http://emits.sso.esa.int/emits/owa/emits.main
Interference Monitoring from Space
A great number of civilian and military applications relies on GNSS for PNT, however its availability could be put at risk by threats such as local interference, amongst others. GNSS spectrum monitoring is essential for:
detecting, characterising and localising interference sources, which could endanger the adequate reception and processing of GNSS signals;
initiating a justified…
Emits link: http://emits.sso.esa.int/emits/owa/emits.main
Next Generation Motion Sensors for Hybrid GNSS INS Solutions in high accuracy machine control applications
Robotics, machine control, industry automation require high accuracy positioning, as well as very robust PNT to support autonomous operations. Relative motion sensors (e.g. IMU) are key to complement GNSS in case of outage or for enhanced robustness and sustained high accuracy. In open sky, the state-of-the-art of GNSS and IMU provide good performance. However, cost-efficient IMUs still face…
Emits link: http://emits.sso.esa.int/emits/owa/emits.main
Quantum Metrology for secure PNT
Quantum metrology techniques show great potential to enhance both precision and security of existing PNT techniques. It has been shown that, by probing physical quantities using quantum states of light and/or matter, one can achieve a precision beyond the theoretical limit set by classical mechanics. This effect has been demonstrated in a variety of contexts and is particularly useful in optical…
Emits link: http://emits.sso.esa.int/emits/owa/emits.main
Next Generation network-assisted PNT assurance
PNT assurance against malicious threats like spoofing relies on four main enablers:
- authenticity of the information relating to the nodes used for computing the position (e.g. clock and ephemeris data of GNSS satellites). It can be built and distributed in a network-assisted configuration, for instance by monitoring the PNT system or accessing directly the original information;
-…
Emits link: http://emits.sso.esa.int/emits/owa/emits.main
Earth Moon GNSS Spaceborne Receiver for In-Orbit-Demonstration
Current GEO and GTO missions already exploit GNSS signals for in-orbit PNT. NASA’s MMS mission has recently demonstrated that tracking of GPS signals is possible up to 150,000 km from Earth surface (half-way the distance to the Moon).
The feasibility of extending the use of GNSS for missions to the Moon has also preliminarily been assessed by ESA via GSP. These preliminary studies have…
Emits link: http://emits.sso.esa.int/emits/owa/emits.main
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