The EPIC aims to address to develop algorithms and a SW simulator for combined usage of GNSS, LEO-PNT  and 5G terrestrial transmitters to achieve high precision PPP-IAR solutions even in urban environments. 

The drivers for this activity are: 

▪ Usage of alternative-PNT (LEO-PNT, 5G) means, in case GNSS is partially or fully not available ▪ Usage of additional-PNT (LEO-PNT, 5G) means on top of GNSS, in signal adverse environments like  urban canyons 

In both cases the target is to achieve fast, precise and reliable PPP integer ambiguity fixing based high precision PVT, beyond the current state-of-the art with GNSS only. 

As the LEO-PNT and 5G systems are strongly relying on transmitter-dependent (varying) wave-lengths signals  (compared to fixed wavelength CDMA GNSS signals), enabling usage of these varying-frequency carrier  phase measurements in PPP-IAR solutions requires basic research activity. Demonstrating successful usage  would strongly enhance the LEO-PNT and 5G based navigation business case. 

The objective of this activity is to achieve a TRL 3 level, primarily based on a ‘Proof-of-Concept’ end-to-end  simulation approach. Therefore, main objectives of the activity are:  

▪ Definition of concept and algorithms for using satellite (GNSS, LEO, 5G-NTN) and terrestrial (5G)  carrier-phase measurements systems with transmitter-dependent (varying) wave-lengths, with the  objective to use them for PPP-IAR positioning in an integrated manner. 

▪ Architecture design, implementation, integration and test of algorithm prototypes in software to  achieve an end-to-end proof-of-concept demonstrator software 

▪ Analysis of achievable performance mainly with synthetic measurements, but also real  measurements, as far as available