List of GPS satellites


, 75 Global Positioning System navigation satellites have been launched, 31 of which are operational, 9 in reserve, 3 being tested, 30 have been retired and 2 were lost at launch. The constellation requires a minimum of 24 operational satellites, and the official target count is 33. The GPS receiver needs 4 satellites to work out your position in 3-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.

Satellites

Satellites by launch date

Satellites by block

BlockLaunchedOperationalTesting/
Reserve		UnhealthyRetiredLaunch
Failures		ManufacturerRemarks
Block I11000101Rockwell
Block II900090RockwellOne prototype was never launched
Block IIA19060130Rockwell
Block IIR1390031Lockheed Martin
Block IIRM871000Lockheed Martin
Block IIF12120000Boeing
Block III330000Lockheed Martin
Block IIIF000000Lockheed Martin
Total753170352-

Orbital slots (by SVN)

Refer to for the most up-to-date information.
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.

Cross reference of PRNs to satellite blocks

The following table is for the purpose of making it possible to determine the block associated with a PRN by looking at one column in one table rather than having to search through all rows of three tables. Thus this table can be used to quickly and easily determine the number of satellites in orbit and health associated with each block.
PRN0102030405060708091011121314151617181920212223242526272829303132NA
IIADDR
IIRHHHDHHHHHDH
HHHHHHHR
IIFHHHHHHHHHHHH
IIIHH

Legend:
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

DateRocketLaunch siteSatelliteSVNRemarks
30 September 2020Falcon 9 Block 5CCAFS, SLC-40GPS III-0477Space vehicle manufacturing contract awarded January 2012. Undergoing thermal vacuum testing in December 2018. The Request For Proposal for launch services was published in June 2017, and proposals were due in August 2017. Launch services for SV-04 through SV-06 were to be jointly awarded to the same winning bidder. In March 2018, the Air Force announced it had awarded the contract to SpaceX.
January 2021Falcon 9 Block 5CCAFS, SLC-40GPS III-0578Space vehicle manufacturing contract awarded February 2013. Core mating in progress in December 2018. Launch services for SV-04 through SV-06 were jointly awarded.
2021Falcon 9 Block 5CCAFS, SLC-40 GPS III-0679Space vehicle manufacturing contract awarded February 2013. In September 2018, the space vehicle was integrating harnesses. Launch services for SV-04 through SV-06 were jointly awarded.
2021CCAFS GPS III-0780Space vehicle manufacturing contract awarded February 2013. It was in assembly in December 2018.
2022CCAFS GPS III-0881Space vehicle manufacturing contract awarded February 2013. The satellite was named "Katherine Johnson" in June 2020 following its successful core mate assembly.
2022CCAFS GPS III-0982Space vehicle manufacturing contract awarded September 2016.
2023CCAFS GPS III-1083Space vehicle manufacturing contract awarded September 2016.

Block IIIF

Projected Available For Launch DateRocketTypeLaunch siteSatelliteSVNRemarks
FY2026CCAFS GPS IIIF-01
FY2026CCAFS GPS IIIF-02
FY2026CCAFS GPS IIIF-03
FY2027CCAFS GPS IIIF-04
FY2027CCAFS GPS IIIF-05
FY2027CCAFS GPS IIIF-06
FY2028CCAFS GPS IIIF-07 Technology Insertion Point
FY2028CCAFS GPS IIIF-08
FY2028CCAFS GPS IIIF-09
FY2028CCAFS GPS IIIF-10
FY2029CCAFS GPS IIIF-11
FY2029CCAFS GPS IIIF-12
FY2030CCAFS GPS IIIF-13 Technology Insertion Point
FY2030CCAFS GPS IIIF-14
FY2031CCAFS GPS IIIF-15
FY2031CCAFS GPS IIIF-16
FY2032CCAFS GPS IIIF-17
FY2032CCAFS GPS IIIF-18
FY2033CCAFS GPS IIIF-19 Technology Insertion Point
FY2033CCAFS GPS IIIF-20
FY2034CCAFS GPS IIIF-21
FY2034CCAFS GPS IIIF-22