Galileo Broadcast Ephemeris and Clock Errors Analysis: 1 January 2017 to 31 July 2020

Abstract

A preliminary analysis of Galileo F/NAV broadcast Clock and Ephemeris is performed in this paper with 43 months of data. Using consolidated Galileo Receiver Independent Exchange (RINEX) navigation files, automated navigation data monitoring is applied from 1 January 2017 to 31 July 2020 to detect and verify potential faults in the satellite broadcast navigation data. Based on these observation results, the Galileo Signal-in-Space is assessed, and the probability of satellite failure is estimated. The Galileo nominal ranging accuracy is also characterized. Results for GPS satellites are included in the paper to compare Galileo performances with a consolidated constellation. Although this study is limited by the short observation period available, the analysis over the last three-year window shows promising results with Psat= 3.2 × 10−6/sat, which is below the value of 1 × 10−5 stated by the Galileo commitments.

Galileo L10 Satellites: Orbit, Clock and Signal-in-Space Performance Analysis

“…Our results related to the Galileo L10 satellites are also in an excellent agreement with a recent study published in the end of November 2020 by Alonso et al [ 23 ]. The study uses gAGE consolidated navigation files and MGEX precise products.…”

“…We found no other results on the Galileo L10 satellites except the aforementioned quarterly performance reports and the results by Alonso et al [ 23 ]. Neither of them report on orbital inclination and repeat period.…”

“…Recently, Alonso et al [ 23 ] reported on the Galileo system performance, including all four Galileo L10 satellites. The study investigated an automatic detection procedure of potential faults in the satellite broadcast F/NAV navigation data, from 43 months between January 2017 and July 2020, as well as MGEX precise orbits and clocks.…”

Improving the precision and accuracy of wildlife monitoring with multi‐constellation, multi‐frequency GNSS collars

“…A GNSS system is composed of a constellation of satellites and a control station network. These satellites broadcast to GNSS devices the time and orbital information for navigation and positioning applications (Alonso et al 2020, Caporali and Zurutuza 2021). Currently there are 4 global positioning satellite systems deployed: the United States Global Positioning System (GPS), the Russian GLObalnaya NAvigatsionnaya Sputnikovaya Sistema (GLONASS), the European Galileo system, and the Chinese BeiDou system.…”

Contributions to multi-purpose GNSS positioning to support multi-frequency and multi-constellation with high accuracy and integrity

“…Due to several systems rely on GPS (especially for SoL systems such as SBAS or GBAS), it is essential to be able to detect and characterize these anomalous events. For instance, in Sanz et al [2018], an study of GPS SIS for more than 11 years is performed where the thesis author has contributed (this study was later expanded in Alonso [2023]).…”