Ionospheric tomographic common clock model of undifferenced uncombined GNSS measurements

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...

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Bibliographic Details
Published in:Journal of geodesy 2021-11, Vol.95 (11), Article 122
Main Authors: Olivares-Pulido, Germán, Hernández-Pajares, Manuel, Lyu, Haixia, Gu, Shengfeng, García-Rigo, Alberto, Graffigna, Victoria, Tomaszewski, Dariusz, Wielgosz, Paweł, Rapiński, Jacek, Krypiak-Gregorczyk, Anna, Kaźmierczak, Rafał, Orús-Pérez, Raul
Format: Article
Language:English
Subjects:
Clocks & watches
Corrections
Earth and Environmental Science
Earth Sciences
Geodetics
Geophysics/Geodesy
Global positioning systems
GPS
Modelling
Original Article
Satellites
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Summary: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.
ISSN:0949-7714
1432-1394
DOI:10.1007/s00190-021-01568-8