The Galileo Open Service (OS), the Galileo High Accuracy Service (HAS) and the Enhanced Search and Rescue (SAR) Service Performance Reports for Q2 2023 are available at the GSC Electronic Library.

The Reports for Q2 2023 are available on our website in the Performance Reports section, providing the status of the Galileo constellation and the achieved performance.

These quarterly reports provide users with the latest information on the Galileo OS, HAS and SAR/Galileo measured performance statistics with respect to their Minimum Performance Levels (MPLs), as defined in their respective Galileo Service Definition Documents: OS-SDD, HAS-SDD and SAR-SDD. Both SDDs can be found here.

The quarterly reports provide information to users on parameters such as:

  • Galileo OS: Ranging Performance, Galileo UTC and Galileo-GPS Time Offset (GGTO) Dissemination and Determination Performance, Galileo Positioning Performance, the Timely Publication of NAGUs (Notice Advisory to Galileo Users);
  • Galileo HAS: Accuracy and Availability of the HAS corrections, and Service Coverage;
  • SAR/Galileo Enhanced Services: Forward Link Service, Detection and Location Performance, Return Link Service, Return Link Message (RLM) Delivery Latency and Reception Probability Performance, European MEOLUT and Space Segment Availability Performance.

Highlights from Q2 2023 Public Performance Reports:

During the reporting period, the measured Galileo OS, HAS and SAR performance figures exceeded their MPL thresholds, specified in the OS-SDD, HAS-SDD and SAR-SDD.

Key highlights:

Open Service:

  • Galileo Open Service Ranging Performance:
    • Per-slot Availability of Healthy Signal in Space for each Galileo operational satellite: average monthly values at least equal to 94.98% for every Single-Frequency and Dual-Frequency combination, above the MPL threshold (92%);
    • Galileo Signal in Space Ranging Accuracy for individual space vehicles: monthly accuracy between 0.24 [m] and 1.30 [m] on Single-Frequency observables. For Dual-Frequency combinations, the accuracy was in the range of 0.14 [m] to 0.35 [m]. Compliance with the MPL target (threshold is 7 [m]) achieved with considerable margins by all satellites of the Galileo constellation;
    • Average Ranging Accuracy at constellation level (over “All Satellites”): figures “per signal” better than or equal to 0.48 [m] for Single-Frequency signals and 0.18 [m] for Dual-Frequency signal combinations. Achieved results at least one order of magnitude better than the MPL threshold (2 [m]).
  • Galileo UTC and GGTO Dissemination and Determination Performance: good values achieved for the UTC Time Dissemination Service Accuracy, the UTC Frequency Dissemination Service Accuracy, and the GGTO Determination Accuracy.
  • Galileo Positioning Performance: availability of both Position Dilution of Precision (PDOP) and Positioning Service target values met with a large margin.
  • Timely Publication of NAGUs for the OS: during the quarter, 15 NAGUs were issued respecting the requirements for their timeliness (target to issue a NAGU at least 48 hours before the start of a scheduled event, as well as not more than 30 hours after the occurrence of an unscheduled one).

High Accuracy Service:

  • Accuracy of the HAS Corrections provided via terrestrial dissemination (IDD) and via SIS for:
    • Orbit was better than or equal to 0.19 [m] for Galileo and  0.31 [m] for GPS satisfying the MPL thresholds (0.20 [m] for Galileo and 0.33 [m] for GPS);
    • Clock offset was 0.07 [m] for Galileo and 0.10 [m] for GPS in compliance with the MPL targets (0.12 [m] for Galileo and 0.15 [m] for GPS);
    • Code bias was better than or equal to 0.23 [m] for Galileo and 0.22 [m] for GPS. Compliance with the MPL target (threshold is 50 [m] for both Galileo and GPS) was achieved with considerable margins.
  • Availability of the HAS Corrections provided via terrestrial dissemination and SIS exceeded 94% for Galileo-only corrections (above defined MPL target of 87 %) and not lower than 97.71% for Galileo + GPS corrections (above defined MPL target of 95 %).
  • Coverage of the HAS Service was always 100%, in the entire service area.
  • Timely publication of NAGUs for the HAS: no HAS-specific NAGU has been published.

Enhanced SAR/Galileo Service:

  • Availability of SAR/Galileo:
    • Forward Link Service: met the MPL target set to 99% during the reporting period with an annually normalised value of 99.93% in June;
    • MEOLUT facilities in “Nominal” and “Nominal or Degraded” modes: remain at excellent levels for Spitsbergen EU MEOLUT, always above the MPL targets of 95% in “Nominal” and 97.5% in “Nominal or Degraded” modes. The availability of Maspalomas and Larnaca MEOLUTs was affected by planned activities, reaching values below the MPL targets in some months of the quarter;
    • Return Link Service: above 99.86% every month of the reported period (MPL set to 95%);
    • SAR Transponders: achieved excellent levels of performance reaching monthly satellite transponder availability above 95% during the reported period (MPL set to 95%), except for GSAT-0210 due to multiple events affecting the navigation provision which led to suspending the satellite since April until further notice.
  • Performance of:
    • Detection Service: above expectations, with monthly values of a valid message detection probability after a single transmitted burst of 100% every month of the reported period (MPL target is 99%);
    • Location Probability: excellent values were achieved with monthly values above 99.9% for  single-burst (MPL target is 90%), and above 99.9% after 12 transmitted bursts (multi-burst) (MPL target is 98%);
    • Location Accuracy: surpassed the targets; monthly values higher than 98.9% for  single-burst and 99.8% for multi-burst transmissions with an accuracy better than 5 km, while the MPLs are 90% and 95% respectively.
  • Return Link Service:
    • Delivery Latency within 15 min: above 99.58% every month of the reported period (MPL set to 99%);
    • Reception Probability: above 99.84% in every month of the reported period (MPL set to 99%).

For the most up-to-date information on the Galileo system and constellation, visit the European Union GSC website, in particular, the Galileo constellation status section.

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