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List of GPS satellites

As of 30 May 2025, 83 Global Positioning System navigation satellites have been built: 31 are launched and operational, 1 has launched and undergoing the commissioning process, 7 are in reserve or testing, 39 are retired, 2 were lost during launch. A single non-operational prototype was never launched. 2 Block III satellites have completed construction and have been declared "Available For Launch" (AFL). The next launch is GPS III SV09, currently targeted for late 2025.

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

Satellites by launch date

SatelliteLaunch (UTC)Carrier rocketLaunch siteBlockNo.SVNPRNSlotLOS3Status
Remarks
OPS 511122 February 197823:44Atlas E/F-SGS-1VAFB, SLC-3EI1401042,703Retired17 July 19855
OPS 511213 May 197810:34Atlas E/F-SGS-1VAFB, SLC-3EI2602071,161Retired16 July 19817
OPS 51137 October 197800:28Atlas E/FVAFB, SLC-3EI3803064,973Retired18 May 19929
OPS 511411 December 197803:59Atlas E/FVAFB, SLC-3EI41004084,046Retired14 October 198911
Used for testing between February 1990 and May 1990.12
OPS 51179 February 198023:08Atlas E/FVAFB, SLC-3EI51305051,389Retired28 November 198314
OPS 511826 April 198022:00Atlas E/FVAFB, SLC-3EI61506093,967Retired6 March 199116
N/A(Navstar 7)19 December 198101:10Atlas E/FVAFB, SLC-3EI707100N/A17
Failed to reach orbit.
OPS 979414 July 198310:21Atlas E/FVAFB, SLC-3WI81808113,583Retired4 May 199319
USA-113 June 198411:37Atlas E/FVAFB, SLC-3WI92009133,660Retired20 June 199421
Used for testing between February 1994 and June 1994.22
USA-58 September 198421:41Atlas E/FVAFB, SLC-3WI102310124,089Retired15 March 199624
Used for testing between November 1995 and March 1996.25
USA-109 October 198502:53Atlas E/FVAFB, SLC-3WI112611033,109Retired13 April 199427
N/A(Prototype)II0120N/A
Qualification vehicle built by Rockwell International to secure Block II contract; never launched.
USA-3514 February 198918:30Delta II 6925-9.5CCAFS, LC-17A28II12914144,059Retired26 March 20003031
USA-3810 June 198922:30Delta II 6925-9.5CCAFS, LC-17A32II2331302B35,371Retired22 February 200434
USA-4218 August 198905:58Delta II 6925-9.5CCAFS, LC-17A35II33616164,075Retired13 October 200037
USA-4721 October 198909:31Delta II 6925-9.5CCAFS, LC-17A38II4391919A54,165Retired16 March 200140
USA-4911 December 198918:10Delta II 6925-9.5CCAFS, LC-17B41II5421717D35,554Retired23 February 200543
USA-5024 January 199022:55Delta II 6925-9.5CCAFS, LC-17A44II64518183,860Retired18 August 200046
USA-5426 March 199002:45Delta II 6925-9.5CCAFS, LC-17A47II74820202,249Retired21 May 199649
Decommissioned after twice changing frequency without being commanded to.
USA-632 August 199005:39Delta II 6925-9.5CCAFS, LC-17A50II8512121E24,438Retired25 September 200252
USA-641 October 199021:56Delta II 6925-9.5CCAFS, LC-17A53II9541515D56,009Retired17 November 200655
Used for testing from November 2006 until March 200756
USA-6626 November 199021:39Delta II 7925-9.5CCAFS, LC-17AIIA157232332E57,720Retired25 January 201658
Decommissioned from active service using PRN23 on 13 February 2004. Set usable with PRN32 on 26 February 2008.59
USA-714 July 199102:32Delta II 7925-9.5CCAFS, LC-17AIIA2602424D17,394Retired30 September 201161
USA-7923 February 199222:29Delta II 7925-9.5CCAFS, LC-17BIIA3622525A26,509Retired18 December 2009
USA-8010 April 199203:20Delta II 7925-9.5CCAFS, LC-17BIIA4632828C21,954Retired15 August 199764
Retired early, replaced by USA-117.
USA-837 July 199209:20Delta II 7925-9.5CCAFS, LC-17BIIA5652626F58,219Retired6 January 201566
USA-849 September 199208:57Delta II 7925-9.5CCAFS, LC-17AIIA6672727A66,910Retired10 August 20116869
USA-8522 November 199223:54Delta II 7925-9.5CCAFS, LC-17AIIA77032310130NAF45,595Retired17 March 200871
PRN changed from 32 to 01 in January 1993 due to receiver problems. Decommissioned 17 March 2008 and removed from slot F4. Briefly resumed L-band transmission in 2014 but signal unusable.7273
USA-8718 December 199222:16Delta II 7925-9.5CCAFS, LC-17BIIA8742929F55,423Retired23 October 200775
USA-883 February 199302:55Delta II 7925-9.5CCAFS, LC-17AIIA9762222B13,591Retired3 December 200277
USA-9030 March 199303:09Delta II 7925-9.5CCAFS, LC-17AIIA10783131C34,592Retired24 October 2005
USA-9113 May 199300:07Delta II 7925-9.5CCAFS, LC-17AIIA117937070124C48,346Retired18 March 201680
Switched to PRN01 in October 2008 but was unusable.81 Switched to PRN24 in April 2012 but was unusable.82
USA-9226 June 199313:27Delta II 7925-9.5CCAFS, LC-17AIIA12833909A57,633Retired19 May 201484
First satellite to complete initial operational 24-satellite constellation.
USA-9430 August 199312:38Delta II 7925-9.5CCAFS, LC-17BIIA1385350530B56,313Retired1 May 201386
Decommissioned from active service using PRN05 in March 2009. Resumed activity using PRN30 in August 2011.87
USA-9626 October 199317:04Delta II 7925-9.5CCAFS, LC-17BIIA1488340418D68,612Retired9 October 20198990
Decommissioned from active service using PRN04 in November 2015.91 Reactivated in March 2018 using PRN18.92 Decommissioned from active service using PRN18 in October 2019.93
USA-10010 March 199403:40Delta II 7925-9.5CCAFS, LC-17AIIA159436060495C67,289Retired21 February 20149697
USA-11728 March 199600:21Delta II 7925-9.5CCAFS, LC-17BIIA16983303C56,702Retired2 August 201499
USA-12616 July 199600:50Delta II 7925-9.5CCAFS, LC-17AIIA171004010E67,179Retired11 March 2016101
USA-12812 September 199608:49Delta II 7925-9.5CCAFS, LC-17AIIA181023030B25,425Retired20 July 2011103
GPS IIR-117 January 199716:28Delta II 7925-9.5CCAFS, LC-17AIIR142120N/A104
Failed to reach orbit.
USA-13223 July 199703:43Delta II 7925-9.5105CCAFS, LC-17AIIR24313F610,186Operational106
Longest-serving satellite in GPS history.
USA-1356 November 199700:30Delta II 7925-9.5CCAFS, LC-17AIIA191073808A38,008Retired9 October 2019108
USA-1457 October 199912:51Delta II 7925-9.5109CCAFS, SLC-17AIIR34611D57,706On orbit spare10 November 2020110111
USA-15011 May 200001:48Delta II 7925-9.5112CCAFS, SLC-17AIIR45120E49,163Operational113
USA-15116 July 200009:17Delta II 7925-9.5114CCAFS, SLC-17AIIR5442822B39,097Operational 115116117118119
USA-15410 November 200017:14Delta II 7925-9.5120CCAFS, SLC-17AIIR6411422F57,918Retired25 January 2023121
Retired 9 July 2020. Subsequently reactivated on 20 January 2022 and decommissioned again on 25 January 2023.
USA-15630 January 200107:55Delta II 7925-9.5122CCAFS, SLC-17AIIR75418E46,244On orbit spare5 March 2018123124
USA-16629 January 200318:06Delta II 7925-9.5125CCAFS, SLC-17BIIR85616B18,170Operational126
USA-16831 March 200322:09Delta II 7925-9.5127CCAFS, SLC-17AIIR94521D37,974Retired27 January 2025128
USA-17521 December 200308:05Delta II 7925-9.5129CCAFS, SLC-17AIIR104722E66,604Retired18 January 2022130
USA-17720 March 200417:53Delta II 7925-9.5131CCAFS, SLC-17BIIR115919C57,754Operational132
USA-17823 June 200422:54Delta II 7925-9.5133CCAFS, SLC-17BIIR126023F45,732Retired2 March 2020134135
USA-1806 November 200405:39Delta II 7925-9.5136CCAFS, SLC-17BIIR136102D17,523Operational137
USA-18326 September 200503:37Delta II 7925-9.5138CCAFS, SLC-17AIIRM15317C47,199Operational139
Also known as IIR-14; first to broadcast L2C signal.
USA-19025 September 200618:50Delta II 7925-9.5140CCAFS, SLC-17AIIRM25231A26,835Operational141
Also known as IIR-15.
USA-19217 November 200619:12Delta II 7925-9.5142CCAFS, SLC-17AIIRM35812B46,782Operational143
Also known as IIR-16; first satellite to complete the full operational 31-satellite constellation.
USA-19617 October 200712:23Delta II 7925-9.5144CCAFS, SLC-17AIIRM45515F26,448Operational145
Also known as IIR-17.
USA-19920 December 200720:04Delta II 7925-9.5146CCAFS, SLC-17AIIRM55729C16,384Operational147
Also known as IIR-18.
USA-20115 March 200806:10Delta II 7925-9.5148CCAFS, SLC-17AIIRM64807A46,298Operational149
Also known as IIR-19.
USA-20324 March 200908:34Delta II 7925-9.5150CCAFS, SLC-17AIIRM74901273006NAB6814In Reserve
Also known as IIR-20; broadcasts demonstration L5 signal. Never entered service due to poor quality signal; decommissioned on 6 May 2011 but subsequently reactivated for testing. Broadcast PRN-01 before decommissioning, PRN-27 after reactivation. Shifted to PRN-30 as of 8 May 2013 and to PRN-06 as of 3 April 2014. Currently not assigned a PRN.151
USA-20617 August 200910:35Delta II 7925-9.5CCAFS, SLC-17AIIRM85005E35,778Operational152
Originally scheduled for launch in 1999 as IIR-3 but damaged during processing.153 Also known as IIR-21; L5 services disconnected from J2 port before launch. Final Delta II launch with a United States Air Force payload,154 final launch from SLC-17A, and final Delta II 7925.
USA-21328 May 201003:00Delta IV M+ (4,2)CCAFS, SLC-37BIIF16225B25,494Operational155
First to broadcast operational L5 signal.
USA-23216 July 201106:41Delta IV M+(4,2)CCAFS, SLC-37BIIF26301D24,409Retired10 August 2023156157
USA-2394 October 201212:10Delta IV M+(4,2)CCAFS, SLC-37BIIF36524A14,634Operational158
USA-24215 May 201321:38Atlas V 401CCAFS, SLC-41IIF46627C24,411Operational159
USA-24821 February 201401:59Delta IV M+ (4,2)CCAFS, SLC-37BIIF56430A34,129Operational160
USA-25117 May 201400:03Delta IV M+ (4,2)CCAFS, SLC-37BIIF66706D44,044Operational161
USA-2562 August 201403:23Atlas V 401CCAFS, SLC-41IIF76809F33,967Operational162
USA-25829 October 201417:21Atlas V 401CCAFS, SLC-41IIF86903E13,879Operational163
USA-26025 March 201518:36Delta IV M+ (4,2)CCAFS, SLC-37BIIF97126B53,732Operational164
USA-26215 July 201515:36Atlas V 401CCAFS, SLC-41IIF107208C33,620Operational165
USA-26531 October 201516:13Atlas V 401CCAFS, SLC-41IIF117310E23,512Operational166
USA-2665 February 201613:38Atlas V 401CCAFS, SLC-41IIF127032F13,415Operational 167
USA-289Vespucci16823 December 201813:51Falcon 9 Block 5CCAFS, SLC-40III17404F42,363Operational 169
USA-293Magellan22 August 201913:06Delta IV M+ (4,2)CCAFS, SLC-37BIII27518D62,121Operational 170
USA-304Matthew Henson30 June 202020:10:46Falcon 9 Block 5CCAFS, SLC-40III37623E51,808Operational171
Initially nicknamed Columbus.172173
USA-309Sacagawea5 November 202023:24:23Falcon 9 Block 5CCAFS, SLC-40III47714B61,680Operational174
USA-319Neil Armstrong17 June 2021 16:09175Falcon 9 Block 5176CCSFS, SLC-40177III57811D51,456Operational178
USA-343Amelia Earhart18 January 2023 12:24Falcon 9 Block 5CCSFS, SLC-40III67928A6876Operational179
USA-440Sally Ride17 December 2024 00:52Falcon 9 Block 5CCSFS, SLC-40III78001D2178Operational180181
Originally contracted for launch on United Launch Alliance's Vulcan rocket; re-assigned to a Falcon 9 launch under the name Rapid Response Trailblazer-1 (RRT-1) within 6 months of launch due to Vulcan's unavailability and to demonstrate United States Space Force's ability to undergo responsive satellite mission planning.182
USA-545Katherine Johnson30 May 2025 17:37Falcon 9 Block 5CCSFS, SLC-40III88121E3F13Launched

Satellites by block

Further information: GPS satellite blocks

BlockLaunchedOperationalTesting/ReserveUnhealthyRetiredLaunchFailuresManufacturerRemarks
Block I11000101Rockwell International
Block II900090Rockwell InternationalOne unlaunched prototype
Block IIA19000190Rockwell International
Block IIR1366001Lockheed Martin
Block IIRM871000Lockheed Martin
Block IIF12110010Boeing
Block III871000Lockheed Martin
Block IIIF000000Lockheed Martin
Total803180392
As of 30 May 2025

Orbital slots (by SVN)

Refer to GPS Constellation Status for the most up-to-date information.

As of 20 February 2025
SlotPlane
ABCDEF
1655657616970
2526266807355
36444725068
4485853675174
571597876
679777543
BlockIIRIIRMIIFIII

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

As of 20 February 2025, 31 of 32 PRNs are in use; PRN 21 is unassigned. Two additional satellites are designated as on-orbit spares.

PRN0102030405060708091011121314151617181920212223242526272829303132--
IIROSOOSOORO
IIRMOOOOOOOS
IIFROOOOOOOOOOO
IIIOOOOOOO
Legend:
  • O – Operational
  • T – Testing in preparation for operation
  • S – On orbit Spare
  • U – Unhealthy and unusable
  • R – Retired

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 IGS ANTEX file[dead link], 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 available by the Bernese GNSS Software.

Planned launches

Block III

Main article: GPS Block III

DateRocketLaunch siteSatelliteSVNRemarks
End of 2025183Vulcan Centaur VC2SCCSFS SLC-41GPS III SV09 Ellison Onizuka82Space vehicle manufacturing contract awarded September 2016.184

Declared "Available for Launch" on 23 Aug 2022.185

2026186Vulcan Centaur VC2SCCSFS, SLC-41GPS III SV10 Hedy Lamarr83Space vehicle manufacturing contract awarded September 2016.187 Component build up stage as of June 2021.188 Component deliveries continuing through May 2022.189

Declared "Available for Launch" on 08 Dec 2022.190

Block IIIF

Main article: GPS Block IIIF

Projected Available For Launch (AFL) DateRocketLaunch siteSatelliteSVNRemarks
Nov 2026191192Vulcan CentaurCCSFS, SLC-41GPS IIIF SV11Construction contract awarded in September 2018. In production. Core mate Feb 2025.
Apr 2027193Vulcan CentaurCCSFS, SLC-41GPS IIIF SV12In production.
Mar 2028194Falcon HeavyKennedy, LC-39AGPS IIIF SV13In production.
Jul 2028195GPS IIIF SV14In production.
Jun 2029196GPS IIIF SV15
Nov 2029197GPS IIIF SV16
Feb 2030198GPS IIIF SV17Technology Insertion Point
Jul 2030199GPS IIIF SV18
Oct 2030200GPS IIIF SV19
Dec 2030201GPS IIIF SV20
Feb 2031202GPS IIIF SV21
Oct 2032203GPS IIIF SV22
FY2030204GPS IIIF SV23Technology Insertion Point
GPS IIIF SV24
FY2031205GPS IIIF SV25
GPS IIIF SV26
FY2032206GPS IIIF SV27
GPS IIIF SV28
FY2033207GPS IIIF SV29Technology Insertion Point
GPS IIIF SV30
FY2034208GPS IIIF SV31
GPS IIIF SV32Launch planned for July 2037209

See also

  • Spaceflight portal

References

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