公开(公告)号：EP4354181A1

公开(公告)日：2024-04-17

申请号：EP23199224.9

申请日：2023-09-22

Applicant: STMicroelectronics S.r.l.

Inventor： RENNA, Michele ,  PALELLA, Nicola Matteo

IPC: G01S19/07

CPC classification number: G01S19/072

Abstract: A method for performing a correction of a ionospheric error affecting pseudo-ranges measurements in a GNSS receiver comprising in a navigation processing procedure performed at a GNSS receiver receiving pseudo range measurements previously calculated by said GNSS receiver obtained from a first carrier signal and a second carrier signal in said satellite signals, performing a correction procedure of said pseudo-range measurements comprising applying to said pseudo-range measurements corrections for predictable errors obtaining corrected pseudo-ranges and applying (15) to said corrected pseudo-range measurements a further ionospheric error correction calculation to obtain further ionospheric error correction values, and performing a position calculation operation (14) processing said corrected pseudo-range measurements and said ionospheric error correction values and outputting position, velocity and time information (PVT) of the GNSS receiver. Said applying to said corrected pseudo-ranges comprises a further ionospheric error correction calculation to obtain further ionospheric error correction values and supplying it to said position calculation operation only, otherwise performing (17) a standard ionospheric error correction derived from GNSS navigation data, in particular by Klobuchar/Nequick models and/or SBAS.