List of GPS satellites
, 83 Global Positioning System navigation satellites have been built: 31 are launched and operational, 1 is undergoing commissioning, 3 are in reserve or testing, 44 are retired, and 2 were lost during launch. One non-operational prototype satellite was never launched. The last Block III satellite has completed construction and been declared "Available For Launch". The next launch is GPS III SV10, currently targeted for March 2026.
The constellation requires a minimum of 24 operational satellites, and allows for up to 32; typically, 31 are operational at any one time. A GPS receiver needs four satellites to work out its position in three dimensions.
SVNs are "space vehicle numbers" which are serial numbers assigned to each GPS satellite. PRNs are the "pseudo-random noise" sequences, or Gold codes, that each satellite transmits to differentiate itself from other satellites in the active constellation.
After being launched, GPS satellites enter a period of testing before their signals are set to "Healthy". During normal operations, certain signals may be set to "Unhealthy" to accommodate updates or testing. After decommissioning, most GPS satellites become on-orbit spares and may be recommissioned if needed. Permanently retired satellites are sent to a higher, less congested disposal orbit where their fuel is vented, batteries are intentionally depleted and communication is switched off.
Satellites
Orbital slots (by SVN)
Refer to for the most up-to-date information.| Block | IIR | IIRM | IIF | III |
Numbers in parentheses refer to non-operational satellites.
Once launched, GPS satellites do not change their plane assignment but slot assignments are somewhat arbitrary and are subject to change.
PRN status by satellite block
, 31 of 32 PRNs are in use. Three additional satellites are designated as on-orbit spares.| PRN | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | -- |
| IIR | O | S | O | O | O | R | O | ||||||||||||||||||||||||||
| IIRM | O | O | O | O | O | O | O | S | |||||||||||||||||||||||||
| IIF | S | O | O | O | O | O | O | O | O | O | O | O | |||||||||||||||||||||
| III | O | O | O | O | O | T | O | O | O |
PRN to SVN history
This section is for the purpose of making it possible to determine the PRN associated with a SVN at a particular epoch. For example, SVN 049 had been assigned PRNs 01, 24, 27, and 30 at different times of its lifespan, whereas PRN 01 had been assigned to SVNs 032, 037, 049, 035, and 063 at different epochs. This information can be found in the, which uses the convention "GNN" and "GNNN" for PRNs and SVNs, respectively. For example, SVN 049 is described as:BLOCK IIR-M G01 G049 2009-014A TYPE / SERIAL NO
2009 3 24 0 0 0.0000000 VALID FROM
2011 5 6 23 59 59.9999999 VALID UNTIL
BLOCK IIR-M G24 G049 2009-014A TYPE / SERIAL NO
2012 2 2 0 0 0.0000000 VALID FROM
2012 3 14 23 59 59.9999999 VALID UNTIL
BLOCK IIR-M G24 G049 2009-014A TYPE / SERIAL NO
2012 8 9 0 0 0.0000000 VALID FROM
2012 8 22 23 59 59.9999999 VALID UNTIL
BLOCK IIR-M G27 G049 2009-014A TYPE / SERIAL NO
2012 10 18 0 0 0.0000000 VALID FROM
2013 5 9 23 59 59.9999999 VALID UNTIL
BLOCK IIR-M G30 G049 2009-014A TYPE / SERIAL NO
2013 5 10 0 0 0.0000000 VALID FROM
whereas for PRN 01 the following excerpt is relevant:
BLOCK IIA G01 G032 1992-079A TYPE / SERIAL NO
1992 11 22 0 0 0.0000000 VALID FROM
2008 10 16 23 59 59.9999999 VALID UNTIL
BLOCK IIA G01 G037 1993-032A TYPE / SERIAL NO
2008 10 23 0 0 0.0000000 VALID FROM
2009 1 6 23 59 59.9999999 VALID UNTIL
BLOCK IIR-M G01 G049 2009-014A TYPE / SERIAL NO
2009 3 24 0 0 0.0000000 VALID FROM
2011 5 6 23 59 59.9999999 VALID UNTIL
BLOCK IIA G01 G035 1993-054A TYPE / SERIAL NO
2011 6 2 0 0 0.0000000 VALID FROM
2011 7 12 23 59 59.9999999 VALID UNTIL
BLOCK IIF G01 G063 2011-036A TYPE / SERIAL NO
2011 7 16 0 0 0.0000000 VALID FROM
A table extracted out of the ANTEX file is made by the .
Planned launches
Block III
| Date | Rocket | Launch site | Satellite | SVN | Remarks |
| March 2026 | Vulcan Centaur VC2S | CCSFS, SLC-41 | GPS III SV10 Hedy Lamarr | 83 | Space vehicle manufacturing contract awarded September 2016. Component build up stage as of June 2021. Component deliveries continuing through May 2022. Declared "Available for Launch" on 08 Dec 2022. Moved from CO to FL January 2026. |
Block IIIF
| Projected Available For Launch Date | Rocket | Launch site | Satellite | SVN | Remarks |
| Nov 2026 | Vulcan Centaur | CCSFS, SLC-41 | GPS IIIF SV11 | Construction contract awarded in September 2018. In production. Core mate Feb 2025. | |
| 2027 | Vulcan Centaur | CCSFS, SLC-41 | GPS IIIF SV12 | In production. | |
| Mar 2028 | Vulcan Centaur | CCSFS, SLC-41 | GPS IIIF SV13 | In production. | |
| Jul 2028 | Vulcan Centaur | CCSFS, SLC-41 | GPS IIIF SV14 | In production. | |
| Jun 2029 | GPS IIIF SV15 | ||||
| Nov 2029 | GPS IIIF SV16 | ||||
| Feb 2030 | GPS IIIF SV17 | Technology Insertion Point | |||
| Jul 2030 | GPS IIIF SV18 | ||||
| Oct 2030 | GPS IIIF SV19 | ||||
| Dec 2030 | GPS IIIF SV20 | ||||
| Feb 2031 | GPS IIIF SV21 | ||||
| Oct 2032 | GPS IIIF SV22 | ||||
| FY2030 | GPS IIIF SV23 | Technology Insertion Point | |||
| FY2030 | GPS IIIF SV24 | ||||
| FY2031 | GPS IIIF SV25 | ||||
| FY2031 | GPS IIIF SV26 | ||||
| FY2032 | GPS IIIF SV27 | ||||
| FY2032 | GPS IIIF SV28 | ||||
| FY2033 | GPS IIIF SV29 | Technology Insertion Point | |||
| FY2033 | GPS IIIF SV30 | ||||
| FY2034 | GPS IIIF SV31 | ||||
| GPS IIIF SV32 | Launch planned for July 2037 |