Recent contributions to precise ionospheric, tropospheric and positioning modelling with GNSS

HERNÁNDEZ-PAJARES M.; GRAFFIGNA, V.; YANG, H.; MONTE, E.; BRUNINI, C.; GENDE, M.; ORUS-PEREZ, R.; LYU, H.; OLIVARES-PULIDO, G.

Roma

Workshop; URSI GRASS 2021; 2021

Sapienza Faculty of Engineering

In this presentation the following contributions to the precise GNSS modelling will be summarized:a) A new blind technique of multi-TID detection and propagation estimation (ADDTID, [1]) and its applicationsto characterize the solar eclipse ionospheric footprint [2] and the potential tsunami signatures and potential realtime warnings [3]. ADDTID allows a much more realistic estimation of different MSTIDs, also when there aremore than one happening simultaneously. It can mitigate very significantly the MSTIDs impact on the accuracyand convergence time in precise positioning, due to the non-linear baseline dependence of this source of error inprecise GNSS positioning.b) A combined precise tropospheric [4] and receiver atomic clock modelling, the key in particular to veryaccurately estimate the ground deformation under sudden water-level rise [5].c) The Wide Area Undifferenced Uncombined Precise Positioning directly supported by IonosphericTomography (WAUUPIT) and its potential extension to global scale.