The subject of this call for tenders is to analyse the technologies, which could deliver positioning, and/or timing information, independently from GNSS, to be effective backup in the event of GNSS disruption, and if possible to be able to provide PNT in the environments where GNSS cannot be delivered.

The objective of this activity is to analyse the technologies, which could deliver positioning, and/or timing information, independently from GNSS, to be effective backup in the event of GNSS disruption, even if it represents an unlikely situation AND if possible to be able to provide PNT in the environments where GNSS services cannot be delivered (e.g. complementary PNT). Such back-up and complementary technologies are further called in this project ‘alternative PNT services’ which together with GNSS constitute ‘resilient PNT services’.