TedDriver.net

Satellite Cross Identification

The following page, hosted by Richard Langley at the University of New Brunswick, defines the mapping between the pseudorandom number (PRN), satellite vehicle number (SVN), and the NORAD catalog number (SSC). It also provides information on the launch date, satellite availability date and the decommissioning date for all GPS satellites. Information about the clock in use on each satellite is also available.

http://www2.unb.ca/gge/Resources/GPSConstellationStatus.txt

Analytical Graphics (AGI), in coordination with the Center for Space Standards and Innovation (CSSI) keeps an up-to-date history of the GPS satellites, including a PRN history for all satellites on their FTP site. The table below is a readable version of this file. The file can be accessed here:

ftp://ftp.agi.com/pub/Catalog/Almanacs/SEM/GPSData.txt

Gps Prn Assignments

Rows in bold are currently active GPS satellites. Other rows are GPS satellites that are no longer active. The SVN number for a satellite is always unique, but the PRN for a satellite can be reused. When a GPS satellite is no longer in service, its PRN is given to a new GPS satellite.

Last updated: 7/21/2017 10:32:36 PM
PRNSVNBlockActiveActive startActive stop
132GpsBlockIIAFeb 01, 1993Mar 19, 2008
149GpsBlockIIRMApr 02, 2009May 23, 2010
163GpsBlockIIFActiveJul 23, 2011
213GpsBlockIIApr 07, 1991May 14, 2004
261GpsBlockIIRNov 14, 2004Dec 23, 2007
261GpsBlockIIRActiveDec 26, 2007
311GpsBlockIApr 07, 1991Apr 10, 1994
333GpsBlockIIAApr 10, 1996Aug 04, 2014
369GpsBlockIIFActiveNov 02, 2014
434GpsBlockIIANov 19, 1993Nov 05, 2015
535GpsBlockIIASep 30, 1993Mar 28, 2009
550GpsBlockIIRMActiveAug 23, 2009
63GpsBlockIApr 07, 1991May 31, 1992
636GpsBlockIIAApr 01, 1994Feb 23, 2014
667GpsBlockIIFActiveMay 22, 2014
737GpsBlockIIAMay 30, 1993Dec 22, 2007
748GpsBlockIIRMActiveMar 21, 2008
838GpsBlockIIANov 22, 1997Nov 28, 1997
838GpsBlockIIADec 13, 1997Nov 01, 2014
838GpsBlockIIAJan 10, 2015Mar 28, 2015
872GpsBlockIIFActiveJul 19, 2015
939GpsBlockIIAJul 04, 1993May 21, 2014
968GpsBlockIIFActiveAug 05, 2014
1040GpsBlockIIAAug 11, 1996Jul 18, 2015
1073GpsBlockIIFActiveNov 06, 2015
118GpsBlockIApr 07, 1991May 09, 1993
1146GpsBlockIIRActiveJan 08, 2000
1210GpsBlockIApr 07, 1991Mar 24, 1996
1258GpsBlockIIRMActiveNov 24, 2006
139GpsBlockIApr 07, 1991Apr 24, 1994
1343GpsBlockIIRAug 24, 1997Aug 31, 1997
1343GpsBlockIIRActiveSep 14, 1997
1414GpsBlockIIApr 07, 1991Apr 15, 2000
1441GpsBlockIIRActiveDec 22, 2000
1515GpsBlockIIApr 07, 1991Nov 19, 2006
1555GpsBlockIIRMActiveOct 27, 2007
1616GpsBlockIIApr 07, 1991Oct 05, 2000
1656GpsBlockIIRActiveFeb 07, 2003
1717GpsBlockIIApr 07, 1991Feb 25, 2005
1753GpsBlockIIRMActiveOct 02, 2005
1818GpsBlockIIApr 07, 1991Aug 17, 2000
1854GpsBlockIIRActiveFeb 17, 2001
1919GpsBlockIIApr 07, 1991Sep 13, 2001
1959GpsBlockIIRActiveMar 27, 2004
2020GpsBlockIIApr 07, 1991Oct 06, 1996
2020GpsBlockIINov 10, 1996Dec 08, 1996
2051GpsBlockIIRActiveJun 03, 2000
2121GpsBlockIIApr 07, 1991Jan 29, 2003
2145GpsBlockIIRActiveApr 09, 2003
2222GpsBlockIIAFeb 26, 1993Jun 01, 2003
2222GpsBlockIIAJun 05, 2003Aug 08, 2003
2247GpsBlockIIRActiveDec 28, 2003
2323GpsBlockIIAApr 07, 1991Feb 15, 2004
2360GpsBlockIIRActiveJul 01, 2004
2424GpsBlockIIAJul 25, 1991Sep 14, 2009
2424GpsBlockIIADec 24, 2009Nov 06, 2011
2465GpsBlockIIFActiveOct 09, 2012
2525GpsBlockIIAMar 22, 1992Aug 22, 2009
2525GpsBlockIIASep 15, 2009Dec 20, 2009
2562GpsBlockIIFActiveMay 24, 2010
2626GpsBlockIIAJul 16, 1992Jan 08, 2015
2671GpsBlockIIFActiveMar 29, 2015
2727GpsBlockIIASep 27, 1992Aug 12, 2011
2727GpsBlockIIADec 18, 2011Oct 08, 2012
2766GpsBlockIIFActiveMay 20, 2013
2828GpsBlockIIAApr 26, 1992Aug 17, 1997
2828GpsBlockIIASep 07, 1997Sep 07, 1997
2828GpsBlockIIANov 08, 1997Nov 08, 1997
2844GpsBlockIIRActiveAug 26, 2000
2929GpsBlockIIAJan 03, 1993Oct 25, 2007
2957GpsBlockIIRMActiveDec 25, 2007
3030GpsBlockIIAOct 03, 1996Jul 22, 2011
3035GpsBlockIIAAug 13, 2011May 03, 2013
3064GpsBlockIIFActiveFeb 24, 2014
3131GpsBlockIIAApr 11, 1993Oct 26, 2005
3152GpsBlockIIRMActiveOct 04, 2006
3232GpsBlockIIADec 11, 1992Jan 24, 1993
3223GpsBlockIIAJun 30, 2007Jan 27, 2016
3270GpsBlockIIFActiveFeb 11, 2016

Navigation blog entries

Gps Basics
The basics of how GPS works with some technical content.

How Long Can You Use an Almanac?
GPS position data is contained in almanac files. Learn how long you can use these for analysis.


Selection of my published papers

Operational Considerations for Improved Accuracy with an IOC Galileo Constellation
This paper looks at how the Galileo operators can improve the performance of an initial Galileo constellation by managing their ephemeris and clock errors. Keeping those errors small can help keep initial positioning errors small, even when large DOPs are present.

Long term prediction of GPS accuracy - Understanding the Fundamentals
Topics on prediction methods for GPS and how long GPS errors can be predicted. Starting from an understanding of the elements of prediction, including almanac use and ephemeris and clock errors, I look at the statistics of GPS position error predictions under various scenarios.

Statistical Analysis of Military and Civilian Navigation Error Data Services
This paper examines the difference between ephemeris and clock errors generated using civilian data versus those generated using military data. The different data sources result from civilian GPS receiver and military GPS receiver.