info:eu-repo/semantics/article
Ionospheric tomographic common clock model of undifferenced uncombined GNSS measurements
Fecha
2021-10-13Registro en:
Olivares Pulido, Germán; Hernández-pajares, Manuel; Lyu, Haixia; Gu, Shengfeng; García Rigo, Alberto; et al.; Ionospheric tomographic common clock model of undifferenced uncombined GNSS measurements; Springer; Journal of Geodesy (print); 95; 11; 13-10-2021; 1-13
0949-7714
1432-1394
CONICET Digital
CONICET
Autor
Olivares Pulido, Germán
Hernández-pajares, Manuel
Lyu, Haixia
Gu, Shengfeng
García Rigo, Alberto
Graffigna, Victoria
Tomaszewski, Dariusz
Wielgosz, Pawel
Rapinski, Jacek
Krypiak Gregorczyk, Anna
Kazmierczak, Rafal
Orús Pérez, Raul
Resumen
In this manuscript, we introduce the Ionospheric Tomographic Common Clock (ITCC) model of undifferenced uncombined GNSS measurements. It is intended for improving the Wide Area precise positioning in a consistent and simple way in the multi-GNSS context, and without the need of external precise real-time products. This is the case, in particular, of the satellite clocks, which are estimated at the Wide Area GNSS network Central Processing Facility (CPF) referred to the reference receiver one; and the precise realtime ionospheric corrections, simultaneously computed under a voxel-based tomographic model with satellite clocks and other geodetic unknowns, from the uncombined and undifferenced pseudoranges and carrier phase measurements at the CPF from the Wide Area GNSS network area. The model, without fixing the carrier phase ambiguities for the time being (just constraining them by the simultaneous solution of both ionospheric and geometric components of the uncombined GNSS model), has been successfully applied and assessed against previous precise positioning techniques. This has been done by emulating real-time conditions for Wide Area GPS users during 2018 in Poland.