Track the Galileo navigation constellation

azmth currently tracks 32 Galileo satellites in CelesTrak's active catalogue, as of 14 September 2026. Data from CelesTrak, refreshed every 2 hours.

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Galileo is the European Union's global navigation satellite system. Its satellites orbit in medium Earth orbit and are listed in tracking catalogues as GSAT followed by a four-digit number. azmth counts them live from CelesTrak data.

Also called European GNSS (EGNSS)

As of 14 September 2026, Galileo is the European Union's operational global navigation satellite system, with 28 of the 32 satellites in the European GNSS Service Centre's constellation table marked usable.

TL;DR· 6 min read

Galileo is the European Union's global navigation satellite system. EUSPA runs its services and ESA procures and launches its satellites. On 14 September 2026 the European GNSS Service Centre listed 32 Galileo satellites, 28 usable and 4 not usable, two days after GSAT0234 returned to service following an outage of about ten days. The latest launch, on 17 December 2025, was the first Galileo flight on Ariane 6, and the next, L15, is expected in the fourth quarter of 2026.

32
in CelesTrak's active catalogue now
as of 14 September 2026
28 of 32
satellites marked usable in the European GNSS Service Centre constellation table
as of 14 September 2026 · source
34
IOV and FOC satellites launched from 21 October 2011 to 17 December 2025
as of 14 September 2026 · source

What Galileo is

Galileo is the European Union's global navigation satellite system, a civil-controlled network in medium Earth orbit that provides positioning, navigation and timing worldwide. On 14 September 2026 the European GNSS Service Centre's constellation table listed 32 Galileo satellites, of which 28 were usable. azmth tracks 32 Galileo satellites in CelesTrak's active catalogue.

Galileo belongs to the European Union Space Programme. EUSPA runs service provision and publishes the system's status through the European GNSS Service Centre (GSC), and ESA procures and launches the satellites. Galileo is under civilian control, whereas GPS is operated by the U.S. Space Force. Galileo's satellites orbit at about 23,220 km, a height derived from their CelesTrak orbital elements, at inclinations between 54.4 and 57.1 degrees; GPS satellites orbit lower, at about 20,200 km.

The first two satellites, from the IOV family, launched on 21 October 2011. By 17 December 2025, 34 IOV and FOC satellites had been launched: 4 IOV and 30 FOC. Two of them have been decommissioned: GSAT0104 on 16 April 2025, after 13 years, and GSAT0205 on 15 December 2025. Four more remain in the GSC table as not usable. GSAT0204 was removed from active service on 8 December 2017 and GSAT0210 on 5 September 2023. GSAT0201 and GSAT0202 have been unavailable since 18 February 2021; both were left in eccentric orbits, inclined at 48.8 degrees, after their 2014 launch anomaly.

In July 2019 a ground-segment equipment malfunction interrupted Galileo's navigation and timing services for six days, from 10 to 17 July, as reported by Phys.org. In September 2026 a single satellite, GSAT0234, had an unplanned outage of all its signals from 05:54 UTC on 2 September until the GSC declared it usable again from 04:54 UTC on 12 September. As of 14 September 2026 no cause had been published beyond the GSC's notices.

The latest launch, L14 on 17 December 2025, was the first Galileo flight on Ariane 6 and carried GSAT0233 and GSAT0234. L15 is expected in the fourth quarter of 2026, according to InsideGNSS on 25 February 2026. L15 and L16 are planned as Ariane 6 launches of two satellites each that complete the first-generation constellation. Arianespace holds Ariane 6 contracts for L17 and L18, the first two pairs of Galileo Second Generation satellites, which use electric propulsion. No newer ESA or EUSPA schedule for L16 or L17 was found; Wikipedia's list of Galileo satellites puts L16 in the first quarter of 2027 and L17 in 2027, citing ESA and CNES, so both dates are targets.

How to find them on the globe

CelesTrak names Galileo satellites GSAT0 followed by three digits, with a Galileo name in brackets: FOC satellites appear as, for example, GSAT0234 (GALILEO 34), and the remaining IOV satellites as GSAT0101 (GALILEO-PFM), GSAT0102 (GALILEO-FM2) and GSAT0103 (GALILEO-FM3). The GALILEO number in brackets does not follow launch order exactly (GSAT0226 is GALILEO 31), and the European GNSS Service Centre lists each satellite by its GSAT number together with a separate SV ID, so GSAT0234 is also E32.

Signals and accuracy

Galileo's services include the Open Service, the High Accuracy Service (HAS), the OSNMA authentication service and the Public Regulated Service. ESA said on 24 January 2023 that the High Accuracy Service was set to deliver horizontal accuracy down to 20 cm and vertical accuracy of 40 cm, free of charge worldwide to users with a suitable receiver, through corrections carried in the Galileo signal. The official Open Service accuracy figure, set out in Galileo's service definition document, was not retrieved for this page, so none is quoted here. On 14 September 2026 the European GNSS Service Centre marked 28 Galileo satellites usable and 4 not usable, with GSAT0234 back in service since 12 September after its outage.

What we know

Operator
European Union Space Programme, under civilian control. EUSPA runs service provision and publishes status through the European GNSS Service Centre (GSC); ESA procures and launches the satellites. as of 14 September 2026 · gsc-europa.eu
GSC constellation table
32 listed: 28 usable and 4 not usable. as of 14 September 2026 · gsc-europa.eu
Not usable
GSAT0201 (E18) and GSAT0202 (E14) since 18 February 2021 (NAGU 2021008); GSAT0204 (E22) since 8 December 2017 (NAGU 2017045); GSAT0210 (E01) since 5 September 2023 (NAGU 2023048). as of 14 September 2026 · gsc-europa.eu
Decommissioned
GSAT0104 on 16 April 2025, after 13 years, per a GSC news item; GSAT0205 (SV ID 24) at 08:30 UTC on 15 December 2025, per notice NAGU 2025059. as of 14 September 2026 · gsc-europa.eu
Launched
34 IOV and FOC satellites (4 IOV, 30 FOC), from 21 October 2011 to 17 December 2025. The same CelesTrak search also returns the GIOVE-A and GIOVE-B test satellites. as of 14 September 2026 · celestrak.org
CelesTrak galileo group
On 14 September 2026 it held 32 objects, the same satellites as the GSC constellation table. azmth's live count of GSAT0 names in CelesTrak's active catalogue is 32. celestrak.org
Orbit
Medium Earth orbit at about 23,220 km, derived from a mean motion of about 1.705 revolutions a day, inclined 54.4 to 57.1 degrees. GSAT0201 and GSAT0202 are in eccentric orbits inclined 48.8 degrees. as of 14 September 2026 · celestrak.org
Latest launch
L14 on 17 December 2025, the first Galileo launch on Ariane 6, carrying GSAT0233 and GSAT0234 (international designators 2025-302A and 2025-302C). Galileo had no launch in 2026 up to 14 September. as of 14 September 2026 · celestrak.org
Next launch (target)
L15, expected in the fourth quarter of 2026, according to InsideGNSS on 25 February 2026. as of 25 February 2026 · insidegnss.com
Second generation
Arianespace holds Ariane 6 launch contracts for L17 and L18, the first two pairs of Galileo Second Generation satellites, which use electric propulsion. newsroom.arianespace.com
High Accuracy Service
ESA said the service was set to deliver horizontal accuracy down to 20 cm and vertical accuracy of 40 cm, free worldwide with a suitable receiver. as of 24 January 2023 · esa.int

Timeline

  1. 21 October 2011

    The first two Galileo satellites, GSAT0101 (GALILEO-PFM) and GSAT0102 (GALILEO-FM2) of the IOV family, launched together. celestrak.org

  2. 8 December 2017

    GSAT0204 was removed from active service (NAGU 2017045); the GSC still lists it as not usable. gsc-europa.eu

  3. July 2019

    A ground-segment equipment malfunction interrupted Galileo's navigation and timing services for six days, from 10 to 17 July, as reported by Phys.org. phys.org

  4. 18 February 2021

    GSAT0201 and GSAT0202, the two satellites in eccentric orbits, became unavailable (NAGU 2021008); the GSC still lists both as not usable. gsc-europa.eu

  5. 24 January 2023

    ESA announced that Galileo's High Accuracy Service would deliver horizontal accuracy down to 20 cm and vertical accuracy of 40 cm, free of charge. esa.int

  6. 5 September 2023

    GSAT0210 was removed from service (NAGU 2023048); the GSC still lists it as not usable. gsc-europa.eu

  7. 15 December 2025

    GSAT0205 (SV ID 24) was decommissioned at 08:30 UTC, according to GSC notice NAGU 2025059. gsc-europa.eu

  8. 17 December 2025

    Ariane 6 launched Galileo L14 at 06:01 CET, the first Galileo flight on Ariane 6, carrying GSAT0233 and GSAT0234; the satellites separated after just under four hours. newsroom.arianespace.com

  9. 2 September 2026

    GSAT0234 (E32) began an unplanned outage of all its signals at 05:54 UTC, as recorded in GSC notice NAGU 2026043. gsc-europa.eu

  10. 12 September 2026

    GSC notice NAGU 2026044 declared GSAT0234 usable again from 04:54 UTC. gsc-europa.eu

Commonly got wrong

  • (1) Searching a satellite catalogue for GSAT does not isolate Galileo. CelesTrak names Galileo satellites GSAT0 followed by three digits, but on 14 September 2026 its gnss group also held ISRO's unrelated GSAT-8, GSAT-10 and GSAT-15, which CelesTrak groups with the satellite-based augmentation (SBAS) payloads. azmth counts Galileo by names beginning GSAT0 followed by three digits.
  • (2) Each Galileo satellite has three identifiers that do not match. CelesTrak names one satellite GSAT0234 (GALILEO 34), and the European GNSS Service Centre lists the same satellite with the SV ID E32. The GALILEO number does not follow launch order exactly either: CelesTrak lists GSAT0226 as GALILEO 31.
  • (3) A satellite flagged as operating in CelesTrak's SATCAT can be out of service. When the catalogue was checked for this page on 14 September 2026, SATCAT still flagged GSAT0205 as operating, although GSC notice NAGU 2025059 had decommissioned it on 15 December 2025, and flagged GSAT0210 the same way although the GSC lists it as not usable. The GSC constellation table is the authority on which satellites are usable.
  • (4) Galileo counts from different sources measure different things. On 14 September 2026 a CelesTrak SATCAT search for GSAT0 returned 36 payloads, the 34 launched Galileo satellites plus the GIOVE-A and GIOVE-B test satellites; CelesTrak's galileo group and the GSC table each held 32; and the GSC marked 28 of those usable.

Sources

  1. European GNSS Service Centre: constellation information (retrieved 14 September 2026)
  2. European GNSS Service Centre: NAGU 2026044, GSAT0234 usable again (12 September 2026)
  3. European GNSS Service Centre: NAGU 2026043, GSAT0234 outage (12 September 2026)
  4. European GNSS Service Centre: NAGU 2025059, GSAT0205 decommissioned (15 December 2025)
  5. CelesTrak: galileo GP element group (14 September 2026)
  6. CelesTrak: gnss GP element group (14 September 2026)
  7. CelesTrak SATCAT: records matching GSAT0
  8. CelesTrak SATCAT: launch 2025-302 (Galileo L14)
  9. Arianespace: Ariane 6 launches Galileo L14 (17 December 2025)
  10. Arianespace: Ariane 6 launch contract for Galileo L18
  11. ESA: New Galileo service set to deliver 20 cm accuracy (24 January 2023)
  12. InsideGNSS: European space community aiming high in 2026 (25 February 2026)
  13. Phys.org: Europe's Galileo six-day outage (July 2019)
  14. Wikipedia: List of Galileo satellites (independent cross-check, as of 31 August 2026)

Checked on 14 September 2026. Where official statements and independent tracking disagree, both are given. The live count above comes from the catalogue, not from this research.

Frequently asked

How many Galileo satellites are there?

On 14 September 2026 the European GNSS Service Centre's constellation table listed 32 Galileo satellites, 28 usable and 4 not usable. In all, 34 satellites of the IOV and FOC families launched between 21 October 2011 and 17 December 2025, and two of those have been decommissioned. azmth currently tracks 32 Galileo satellites in CelesTrak's active catalogue.

Who operates Galileo?

Galileo belongs to the European Union Space Programme and is under civilian control. EUSPA runs service provision and publishes the system's status through the European GNSS Service Centre, and ESA procures and launches the satellites.

How accurate is Galileo?

ESA said on 24 January 2023 that Galileo's High Accuracy Service was set to deliver horizontal accuracy down to 20 cm and vertical accuracy of 40 cm, free of charge worldwide to users with a suitable receiver, through corrections carried in the Galileo signal. The official Open Service accuracy figure was not retrieved for this page, so none is quoted. Galileo's services also include OSNMA authentication and the Public Regulated Service.

When is the next Galileo launch?

L15, expected in the fourth quarter of 2026 according to InsideGNSS on 25 February 2026; Galileo had no launch in 2026 up to 14 September. L15 and L16 are planned to complete the first-generation constellation with two satellites each, and Arianespace holds Ariane 6 contracts for L17 and L18, the first two pairs of Galileo Second Generation satellites. No newer ESA or EUSPA schedule for L16 or L17 was found; Wikipedia's list of Galileo satellites puts L16 in the first quarter of 2027 and L17 in 2027.

Was Galileo down in September 2026?

One satellite, GSAT0234, had an unplanned outage of all its signals from 05:54 UTC on 2 September 2026, and GSC notice NAGU 2026044 declared it usable again from 04:54 UTC on 12 September 2026. On 14 September 2026 the GSC listed 28 of its 32 satellites as usable. Earlier, in July 2019, a ground-segment equipment malfunction interrupted Galileo's navigation and timing services for six days, as reported by Phys.org.

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