Encyclopedia Astronautica
Navstar



gpsiia.jpg
GPS IIA in assembly
Credit: Hughes
The Navstar GPS (Global Positioning System) program was a joint service effort directed by the United States Department of Defence. Navstar GPS is a space-based radio-positioning system nominally consisting of a 24-satellite constellation that provides navigation and timing information to military and civilian users worldwide. In addition to the satellites, the system consists of a worldwide satellite control network and GPS receiver units that acquire the satellite's signals and translate them into position information. Originally envisioned as primarily a military system, GPS was found to have a wide variety of civilian applications, many of them never conceived by the original system's designers.

By 2000 civilian users greatly outnumbered military users, and the trend increased year-by-year. The very similar Russian GLONASS system used similar frequencies and single receivers could be built to handle signals from both satellites. Concerns about the US control over a system that came to be essential to civilian and military users worldwide led Europe to begin development of their own independent Galileo system in 2002.

GPS is managed by an Interagency GPS Executive Board. The US Air Force is designated as the executive service for system management. The system is operated and controlled by the 50th Space Wing's (Air Force Space Command) 2nd Space Operations Squadron, Schriever Air Force Base, Colorado. The Space and Missile Systems Center's (Air Force Space Command) Navstar GPS Joint Program Office, Los Angeles Air Force Base, California, is the DoD agency for acquiring GPS satellites, ground systems and military user equipment.

Delta II expendable launch vehicles are used to launch the GPS satellites from Cape Canaveral Air Station, FL, into six planes of circular 20,200 km / 12-hour orbits .

GPS provides the following:

  • 24-hour, worldwide service
  • Extremely accurate, three-dimensional location information (providing latitude, longitude, and altitude readings)
  • Extremely accurate velocity information
  • Precise timing services
  • A worldwide common grid that is easily converted to any local grid
  • Continuous real-time information
  • Accessibility to an unlimited number of worldwide users
  • Civilian user support at a slightly less accurate level

The GPS worldwide satellite control system consists of five monitor stations and four ground antennas. The monitor stations use GPS receivers to passively track the navigation signals of all the satellites. Information from the monitor stations is then processed at the master control stations, operated by the 2nd Space Operations Squadron at Schriever Air Force Base, CO., and used to accurately update the satellites' navigation messages. The Master Control Station at Schriever Air Force Base sends updated navigation information to the GPS satellites through ground antennas using an S-band signal. The ground antennas are also used to transmit commands to satellites and to receive the satellites' state-of-the-art telemetry data.

The signals are so accurate that time can be figured to within 100 nanoseconds, velocity can be figured to within a fraction of a km per hour, and location can be figured to within meters.

GPS satellites orbit the earth every 12 hours emitting continuous navigation signals on two different L-band frequencies, L1 and L2.

Fundamental research on timing and navigation technology for Navstar was conducted by the Timation satellite series in the 1960's. There followed four generations of GPS satellites: the Block I, the Block IIA, the Block IIR, and the Block IIF. Block I satellites were used to test the principles of the Global Positioning System, and lessons learned from these 11 satellites were incorporated into later blocks. Block II, IIA and IIR satellites made up the constellation by the turn of the century. A total of 28 II/IIAs were put on contract, with the last four tagged as replacements for earlier satellites reaching the end of their service life. Block IIRs replaced older Block II/IIAs as they wear out. Block IIF fourth generation satellites were planned to begin flying in 2005.

The Joint Program Office Advanced Plans Branch is actively studying the opportunity to improve accuracy, availability, integrity, and survivability to meet emerging military and civil needs through 2030. The next block of satellites, called GPS III, would continue to deliver the new civil signals and improved military codes that were initiated on the GPS IIR-M and IIF programs. The first launch of research and development GPS III satellites was not expected before 2010.

Navstar continues to perform as the world's premier positioning and navigation systems. Endeavors such as mapping, aerial refueling, rendezvous operations, geodetic surveying, and search and rescue operations have all benefited greatly from GPS's accuracy.

Using lessons learned from Operations Desert Shield and Desert Storm, GPS User Equipment is being integrated into nearly all facets of modern warfare. Forward air controllers, pilots, tank drivers, and ground troops all use GPS to help ensure victory on the battlefield. GPS User Equipment consists of the receivers that use the signal from GPS satellites to compute position, time, and velocity primarily for military users. GPS receivers are integrated into every type of system used by the DoD: aircraft, spacecraft, munitions, ground vehicles and ships.

Stand-alone, hand-held receivers for individual use are also widespread among all branches of the Department. These receivers provide real-time situational awareness for the warfighter much more quickly and accurately than previous, conventional methods. GPS-guided munitions showcase this increased capability and are delivered with unprecedented accuracy, thus improving crew survivability while decreasing the number of weapons required to achieve military objectives.

Inherent to the future of military search and rescue is the Combat Survivor Evader Locator (CSEL). The CSEL system is a worldwide architecture of UHF ground stations, Joint Search and Rescue C2 systems and will include 46,000 robust handheld radios. The radios communicate through military, national and civil satellites for use by joint-service aircrews, including special operations. Designed to take the "search" out of "search and rescue," CSEL acquires a precise GPS derived location and communicates directly with rescue forces and, perhaps just as important, communicates to the survivor/evader that rescue is imminent.

As a service to GPS users, the Department of Transportation has established the "Navigation Information Service" (formerly "GPS Information Service") as a point of contact for civil GPS users.

GPS Development

In the late 1950's, scientists at John Hopkins University developed a way to use radio signals originating from a satellite in space to provide accurate position updates to navigation equipment located on the US Navy's ships and submarines. By the mid-1960's, the Air Force initiated a program consisting of several satellites with very accurate clocks onboard that could give off timing signals of their location in space which would accurately determine the position of a vehicle moving on land or in the air. In 1973, the Navy and the Air Force programs combined to form the Navigation Technology Program, which later evolved into the Navstar Global Positioning System (GPS) in operation today.

Navstar GPS became the world's premier position, navigation and timing information service. Civilian users around the globe rely upon Navstar GPS as well. In fact, the system serves millions of civil users with over a 1.4 million handheld and vehicle-mounted GPS receivers having been produced each year since 1997. The rapidly growing GPS market, including equipment and applications, reached $6.2 billion in 2000 and was expected to surpass $50 billion by 2010.

The fundamental concept of GPS is to use simultaneous distance measurements from four satellites to compute the position and time of any receiver on or above the Earth's surface. The GPS satellites broadcast signals on two different frequencies so that sophisticated user receivers can correct for distortion effects due to the ionosphere, a layer of the atmosphere several hundred miles above the Earth. It takes between 65 and 85 milliseconds for a signal to travel from a GPS satellite to a receiver on the surface of the Earth. The signals are so accurate that time can be figured to much less than a millionth of a second, velocity can be figured to within a fraction of a km per hour, and location can be figured to within a few meters. Typical horizontal positioning accuracy for military users is 7 to 10 meters. Prior to the mid-1990's a purposely 'degraded signal' was provided for civilian users, limiting their accuracy to 70 to 100 meters. This was eliminated by order of President Clinton as it became obvious that civilian and commercial users had many unimagined uses for precise location and timing information as well.

Each Block II or IIA satellite has two cesium atomic clocks and two rubidium atomic clocks, while each Block IIR has three rubidium atomic clocks. The stability of these clocks is estimated to be approximately 1 second per 300,000 years. Only one clock is in use on each satellite at a time. The others are backups.

The cost to the Air Force in 1973 2000 to develop and procure the GPS satellites (not including military user equipment or launch costs) was approximately $5.6 billion in 'Year 2000' dollars. The approximate annual cost to operate and maintain the constellation, including research and development and procurement of new satellites, is $750 million.

The GPS worldwide satellite network consists of six monitor stations and four ground antenna stations. The monitor stations (located at Ascension Island, Cape Canaveral, Colorado Springs, Diego Garcia, Kwajalein and Hawaii) use specially-designed GPS receivers to passively track the navigation signals of all of the satellites. Data from the monitor stations is continually sent to the GPS Master Control Station (MCS), located at Schriever Air Force Base, Colorado, for processing. The MCS computes precise, updated information on the satellites' orbits and clock status every 15 minutes, 24 hours a day, seven days a week. Updated navigation information is sent from the MCS to the ground antenna stations (located at Ascension Island, Cape Canaveral, Diego Garcia and Kwajalein) and then to the satellites. These "uploads" are done once or twice per day for each satellite. This is sufficient to maintain the high accuracy of the GPS constellation.

By the year 2000 civil users outnumber military users by 100 to 1 and the ratio was increasing. The Compound Annual Growth Rate of the GPS market was growing by approximately 22%.

GPS satellites broadcast on two links to users: L1 and L2. L1 is transmitted at a frequency of 1575.42 MHz, and carries both a Coarse/Acquisition (C/A) ranging code and a Precise (P(Y)) ranging code. L2 is transmitted at a frequency of 1227.6 MHz and carries only the P(Y) code. Only the C/A code on L1 was originally available to all users. The military users have access to both the C/A code on L1 and the P(Y) code on L1 and L2. To access GPS for general use, a civilian user may purchase a hand-held or vehicle-mounted GPS receiver. The civil signal is free to all users worldwide. No subscription, license, fee or registration is required.

The future of plans for GPS included increased power and accuracy, as well as increased civil navigation safety with the addition of a new civil signal on the L2 link and a new civil-only signal on a new link, L5, to be broadcast at 1176.45 MHz. A new military-only signal (M-code) on the L1 and L2 links will be fully operational in 2010. It will have increased power and reduced vulnerability to signal jamming.

More... - Chronology...


Associated Countries
Associated Spacecraft
  • Timation American navigation technology satellite. 2 launches, 1967.05.31 (Timation 1) and 1969.09.30 (Timation 2). More...
  • NTS American navigation technology satellite. 2 launches, 1974.07.14 (NTS 1) and 1977.06.23 (NTS 2). Demonstrated navigation technologies. More...
  • GPS Block 1 American navigation satellite. 11 launches, 1978.02.22 (Navstar 1) to 1985.10.09 (USA 10). GPS Block 1 prototype satellites formed the GPS Demonstration system and were followed by the Block 2 operational system. More...
  • GPS Block 2 and 2A American navigation satellite. 28 launches, 1989.02.14 (USA 35) to 1997.11.06 (USA 134). The Navstar GPS constellation worked in concert with ground receivers to give precise location information to military and civilian users anywhere in the world. More...
  • SEDS American tether technology satellite. 4 launches, 1993.03.30 (SEDS 1) to 1994.03.10 (SEDS 2 Deployer). More...
  • PMG American tether technology satellite. 2 launches, 1993.06.26 (PMG) and (PMG). Plasma Motor Generator More...
  • GPS Block 2R American navigation satellite. 21 launches, 1997.01.17 (USA 132) to 2009-08-17. Launches began in 1997 of 'GPS-IIR' replenishment satellites, produced by General Electric Astrospace (later acquired by Lockheed Missiles & Space). More...

See also
Associated Launch Vehicles
  • Atlas F American intercontinental ballistic missile. Final operational version of Atlas ICBM. Differed in guidance systems. Deployed as missiles from 1961 to 1966. After retirement, the ICBM's were refurbished and used for over thirty years as space launch vehicles. More...
  • Atlas F/SVS American orbital launch vehicle. Atlas F + 1 x Star 37E + 1 x Star 37E upper stages. More...
  • Atlas E/SVS American orbital launch vehicle. Atlas E + 1 x Star 37E + 1 x Star 37E upper stages. More...
  • Atlas E/SGS-2 American orbital launch vehicle. Atlas E + 1 x Star 48 + 1 x Star 48 upper stages. More...
  • Delta 6925 American orbital launch vehicle. Four stage vehicle consisting of 9 x Castor 4A + 1 x EELT Thor/RS-27+ 1 x Delta K + 1 x Star 48B More...
  • Delta 7925 American orbital launch vehicle. Four stage vehicle consisting of 9 x GEM-40 + 1 x EELT Thor/RS-27A + 1 x Delta K + 1 x Star 48B More...
  • Delta 7925-9.5 American orbital launch vehicle. Four stage vehicle consisting of 9 x GEM-40 + 1 x EELT Thor/RS-27A + 1 x Delta K + 1 x Star 48B with 2.9 m (9.5 foot) diameter fairing) More...

Associated Manufacturers and Agencies
  • NRL American manufacturer of rockets and spacecraft. Naval Research Laboratory, Washington, DC, USA. More...
  • USN American agency overseeing development of rockets, spacecraft, and rocket engines. USN Joint Task Force 7, USA. More...
  • USAF American agency overseeing development of rockets and spacecraft. United States Air Force, USA. More...
  • MDAC American manufacturer of spacecraft. McDonnell Douglas Astronautics Co. , USA More...
  • MDSSC American agency. McDonnell Douglas Space Systems Corp, USA. More...
  • Lockheed American manufacturer of rockets, spacecraft, and rocket engines. Lockheed Martin, Sunnyvale, CA, USA. More...

Associated Launch Sites
  • Cape Canaveral America's largest launch center, used for all manned launches. Today only six of the 40 launch complexes built here remain in use. Located at or near Cape Canaveral are the Kennedy Space Center on Merritt Island, used by NASA for Saturn V and Space Shuttle launches; Patrick AFB on Cape Canaveral itself, operated the US Department of Defense and handling most other launches; the commercial Spaceport Florida; the air-launched launch vehicle and missile Drop Zone off Mayport, Florida, located at 29.00 N 79.00 W, and an offshore submarine-launched ballistic missile launch area. All of these take advantage of the extensive down-range tracking facilities that once extended from the Cape, through the Caribbean, South Atlantic, and to South Africa and the Indian Ocean. More...
  • Vandenberg Vandenberg Air Force Base is located on the Central Coast of California about 240 km northwest of Los Angeles. It is used for launches of unmanned government and commercial satellites into polar orbit and intercontinental ballistic missile test launches toward the Kwajalein Atoll. More...

Navstar Chronology


1967 May 31 - . 09:30 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2W. LV Family: Delta. Launch Vehicle: Thor Agena D SLV-2. LV Configuration: Thor SLV-2 Agena D 443 / Agena D SS-01B 2704.
  • Timation 1 - . Mass: 700 kg (1,540 lb). Nation: USA. Agency: NRL. Program: Navstar. Class: Technology. Type: Navigation technology satellite. Spacecraft: Timation. USAF Sat Cat: 2847 . COSPAR: 1967-053E. Apogee: 900 km (550 mi). Perigee: 894 km (555 mi). Inclination: 70.0000 deg. Period: 102.90 min. Summary: Navigation experiments leading eventually to Navstar/GPS system. Operated for 74 months..

1969 September 30 - . 13:40 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC1W. LV Family: Delta. Launch Vehicle: Thorad Agena D SLV-2G. LV Configuration: Thorad SLV-2G Agena D 525 / Agena D.
  • Timation 2 - . Mass: 700 kg (1,540 lb). Nation: USA. Agency: NRL. Program: Navstar. Class: Technology. Type: Navigation technology satellite. Spacecraft: Timation. USAF Sat Cat: 4257 . COSPAR: 1969-082C. Apogee: 925 km (574 mi). Perigee: 898 km (557 mi). Inclination: 70.0000 deg. Period: 103.20 min. Summary: Navigation experiments leading eventually to Navstar/GPS system. Operated for 6 years..

1974 July 14 - . 05:17 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3W. LV Family: Atlas. Launch Vehicle: Atlas F/PTS. LV Configuration: Atlas F/PTS 69F.
  • NTS 1 - . Payload: Timation 3 / OPS 7518. Mass: 293 kg (645 lb). Nation: USA. Agency: USAF. Program: Navstar. Class: Technology. Type: Navigation technology satellite. Spacecraft: NTS. USAF Sat Cat: 7369 . COSPAR: 1974-054A. Apogee: 13,774 km (8,558 mi). Perigee: 13,446 km (8,354 mi). Inclination: 125.2000 deg. Period: 468.70 min. Summary: Demonstrated navigation technologies leading eventually to Navstar/GPS system. Operated for 5 years..

1977 June 23 - . 09:16 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3W. LV Family: Atlas. Launch Vehicle: Atlas F. LV Configuration: Atlas F 65F / SGS-1.
  • NTS 2 - . Mass: 431 kg (950 lb). Nation: USA. Agency: USAF; USN. Program: Navstar. Class: Technology. Type: Navigation technology satellite. Spacecraft: NTS. USAF Sat Cat: 10091 . COSPAR: 1977-053A. Apogee: 20,256 km (12,586 mi). Perigee: 20,115 km (12,498 mi). Inclination: 63.9000 deg. Period: 718.10 min. Summary: Navigation Technical Satellite; GPS precursor. Operated 50% satisfactorily -- still operating 25 years later..

1978 February 22 - . 23:44 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3E. LV Family: Atlas. Launch Vehicle: Atlas F/SVS. LV Configuration: Atlas F/SVS 64F.
  • Navstar 1 - . Payload: GPS SVN 1 / OPS 5111. Mass: 759 kg (1,673 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 1. USAF Sat Cat: 10684 . COSPAR: 1978-020A. Apogee: 20,560 km (12,770 mi). Perigee: 20,249 km (12,582 mi). Inclination: 64.5000 deg. Period: 727.00 min. Summary: Also known as Navigational Development Satellite 1. Technology prototype of Navstar satellite..

1978 May 13 - . 10:34 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3E. LV Family: Atlas. Launch Vehicle: Atlas F/SVS. LV Configuration: Atlas F/SVS 49F.
  • Navstar 2 - . Payload: GPS SVN 2 / OPS 5112. Mass: 759 kg (1,673 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 1. USAF Sat Cat: 10893 . COSPAR: 1978-047A. Apogee: 20,653 km (12,833 mi). Perigee: 19,523 km (12,131 mi). Inclination: 63.6000 deg. Period: 714.20 min. Summary: Also known as Navigational Development Satellite 2. Technology prototype of Navstar satellite..

1978 October 7 - . 00:28 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3E. LV Family: Atlas. Launch Vehicle: Atlas F/SVS. LV Configuration: Atlas F/SVS 47F.
  • Navstar 3 - . Payload: GPS SVN 3 / OPS 5113. Mass: 759 kg (1,673 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 1. USAF Sat Cat: 11054 . COSPAR: 1978-093A. Apogee: 20,941 km (13,012 mi). Perigee: 20,706 km (12,866 mi). Inclination: 63.3000 deg. Period: 744.20 min. Summary: Technology prototype of Navstar satellite..

1978 December 11 - . 03:59 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3E. LV Family: Atlas. Launch Vehicle: Atlas F/SVS. LV Configuration: Atlas F/SVS 39F.
  • Navstar 4 - . Payload: GPS SVN 4 / OPS 5114. Mass: 770 kg (1,690 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 1. USAF Sat Cat: 11141 . COSPAR: 1978-112A. Apogee: 21,012 km (13,056 mi). Perigee: 20,750 km (12,890 mi). Inclination: 64.6000 deg. Period: 746.50 min. Summary: Global Positioning System. First pre-opertional Navstar satellite..

1980 February 9 - . 23:08 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3E. LV Family: Atlas. Launch Vehicle: Atlas F/SVS. LV Configuration: Atlas F/SVS 35F.
  • Navstar 5 - . Payload: GPS SVN 5 / OPS 5117. Mass: 770 kg (1,690 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 1. USAF Sat Cat: 11690 . COSPAR: 1980-011A. Apogee: 20,560 km (12,770 mi). Perigee: 19,805 km (12,306 mi). Inclination: 64.9000 deg. Period: 718.00 min. Summary: Global Positioning System..

1980 April 26 - . 22:00 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3E. LV Family: Atlas. Launch Vehicle: Atlas F/SVS. LV Configuration: Atlas F/SVS 34F.
  • Navstar 6 - . Payload: GPS SVN 6 / OPS 5118. Mass: 770 kg (1,690 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 1. USAF Sat Cat: 11783 . COSPAR: 1980-032A. Apogee: 20,471 km (12,720 mi). Perigee: 19,387 km (12,046 mi). Inclination: 62.8000 deg. Period: 707.80 min. Summary: Global Positioning System..

1981 December 19 - . 01:10 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3E. LV Family: Atlas. Launch Vehicle: Atlas E/SVS. LV Configuration: Atlas E/SVS 76E. FAILURE: Failure.. Failed Stage: 1.
  • Navstar 7 - . Payload: GPS SVN 7. Mass: 770 kg (1,690 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 1. Decay Date: 1981-12-18 . COSPAR: F811219A. Summary: Global Positioning System..

1983 July 14 - . 10:21 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3W. LV Family: Atlas. Launch Vehicle: Atlas E/SGS-2. LV Configuration: Atlas E/SGS-2 75E.
  • Navstar 8 - . Payload: GPS SVN 8 / OPS 9794. Mass: 770 kg (1,690 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 1. USAF Sat Cat: 14189 . COSPAR: 1983-072A. Apogee: 21,229 km (13,191 mi). Perigee: 20,757 km (12,897 mi). Inclination: 64.2000 deg. Period: 751.10 min. Summary: Global Positioning System..

1984 June 13 - . 11:37 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3W. LV Family: Atlas. Launch Vehicle: Atlas E/SGS-2. LV Configuration: Atlas E/SGS-2 42E.
  • USA 1 - . Payload: GPS SVN 9. Mass: 770 kg (1,690 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 1. USAF Sat Cat: 15039 . COSPAR: 1984-059A. Apogee: 21,194 km (13,169 mi). Perigee: 20,681 km (12,850 mi). Inclination: 64.2000 deg. Period: 748.80 min. Summary: Global Positioning System..

1984 September 8 - . 21:41 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3W. LV Family: Atlas. Launch Vehicle: Atlas E/SGS-2. LV Configuration: Atlas E/SGS-2 14E.
  • USA 5 - . Payload: GPS SVN 10. Mass: 770 kg (1,690 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 1. USAF Sat Cat: 15271 . COSPAR: 1984-097A. Apogee: 21,203 km (13,174 mi). Perigee: 20,612 km (12,807 mi). Inclination: 61.9000 deg. Period: 747.60 min. Summary: Global Positioning System..

1985 October 9 - . 02:53 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC3W. LV Family: Atlas. Launch Vehicle: Atlas E/SGS-2. LV Configuration: Atlas E/SGS-2 55E.
  • USA 10 - . Payload: GPS SVN 11. Mass: 770 kg (1,690 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 1. USAF Sat Cat: 16129 . COSPAR: 1985-093A. Apogee: 21,673 km (13,466 mi). Perigee: 20,765 km (12,902 mi). Inclination: 65.0000 deg. Period: 760.40 min. Summary: Global Positioning System..

1989 February 14 - . 18:30 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Delta. Launch Vehicle: Delta 6925. LV Configuration: Delta 6925 D184.
  • USA 35 - . Payload: GPS 2-1 / GPS SVN 14. Mass: 1,665 kg (3,670 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 19802 . COSPAR: 1989-013A. Apogee: 21,758 km (13,519 mi). Perigee: 21,480 km (13,340 mi). Inclination: 56.6000 deg. Period: 777.00 min. Summary: First launch of second generation / operational Global Positioning System. Placed in Plane E Slot 1 of the constellation. Suffered a shutdown of its onboard reaction wheels on March 26, 2000. Decommissioned on April 14, 2000 and replaced by GPS 2R-4..

1989 June 10 - . 22:19 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Delta. Launch Vehicle: Delta 6925. LV Configuration: Delta 6925 D185.
  • USA 38 - . Payload: GPS 2-2 / GPS SVN 13. Mass: 1,665 kg (3,670 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 20061 . COSPAR: 1989-044A. Apogee: 20,514 km (12,746 mi). Perigee: 19,849 km (12,333 mi). Inclination: 54.8000 deg. Period: 718.00 min. Summary: Global Positioning System. Placed in Plane B Slot 3..

1989 August 18 - . 05:58 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Delta. Launch Vehicle: Delta 6925. LV Configuration: Delta 6925 D186.
  • USA 42 - . Payload: GPS 2-3 / GPS SVN 16. Mass: 1,665 kg (3,670 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 20185 . COSPAR: 1989-064A. Apogee: 21,576 km (13,406 mi). Perigee: 21,509 km (13,365 mi). Inclination: 56.4000 deg. Period: 773.80 min. Summary: Global Positioning System. Retired..

1989 October 21 - . 09:31 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Delta. Launch Vehicle: Delta 6925. LV Configuration: Delta 6925 D188.
  • USA 47 - . Payload: GPS 2-4 / GPS SVN 19. Mass: 1,665 kg (3,670 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 20302 . COSPAR: 1989-085A. Apogee: 21,236 km (13,195 mi). Perigee: 21,190 km (13,160 mi). Inclination: 53.3000 deg. Period: 760.20 min. Summary: Global Positioning System. Placed in Plane A Slot 5..

1989 December 11 - . 18:10 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17B. LV Family: Delta. Launch Vehicle: Delta 6925. LV Configuration: Delta 6925 D190.
  • USA 49 - . Payload: GPS 2-5 / GPS SVN 17. Mass: 1,665 kg (3,670 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 20361 . COSPAR: 1989-097A. Apogee: 20,371 km (12,657 mi). Perigee: 19,992 km (12,422 mi). Inclination: 55.4000 deg. Period: 718.00 min. Summary: Global Positioning System. Placed in Plane D Slot 3..

1990 January 24 - . 22:55 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Delta. Launch Vehicle: Delta 6925. LV Configuration: Delta 6925 D191.
  • USA 50 - . Payload: GPS 2-6 / GPS SVN 18. Mass: 1,665 kg (3,670 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 20452 . COSPAR: 1990-008A. Apogee: 21,226 km (13,189 mi). Perigee: 21,168 km (13,153 mi). Inclination: 55.0000 deg. Period: 759.50 min. Summary: Global Positioning System. Retired..

1990 March 26 - . 02:45 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Delta. Launch Vehicle: Delta 6925. LV Configuration: Delta 6925 D193.
  • USA 54 - . Payload: GPS 2-7 / GPS SVN 20. Mass: 1,665 kg (3,670 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 20533 . COSPAR: 1990-025A. Apogee: 21,156 km (13,145 mi). Perigee: 20,960 km (13,020 mi). Inclination: 53.7000 deg. Period: 753.80 min. Summary: Global Positioning System. Declared unusable on 21 May 1996 at 22:42 following two uncommanded changes in frequency standards..

1990 August 2 - . 05:39 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Delta. Launch Vehicle: Delta 6925. LV Configuration: Delta 6925 D197.
  • USA 63 - . Payload: GPS 2-8 / GPS SVN 21. Mass: 1,665 kg (3,670 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 20724 . COSPAR: 1990-068A. Apogee: 20,468 km (12,718 mi). Perigee: 19,896 km (12,362 mi). Inclination: 54.7000 deg. Period: 718.00 min. Summary: Global Positioning System. Placed in Plane E Slot 2..

1990 October 1 - . 21:56 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Delta. Launch Vehicle: Delta 6925. LV Configuration: Delta 6925 D199.
  • USA 64 - . Payload: GPS 2-9 / GPS SVN 15. Mass: 1,665 kg (3,670 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 20830 . COSPAR: 1990-088A. Apogee: 20,363 km (12,652 mi). Perigee: 20,002 km (12,428 mi). Inclination: 55.4000 deg. Period: 718.00 min. Summary: Global Positioning System. Placed in Plane D Slot 5..

1990 November 26 - . 21:39 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Delta. Launch Vehicle: Delta 7925. LV Configuration: Delta 7925 D201.
  • USA 66 - . Payload: GPS 2A-10 / GPS SVN 23. Mass: 1,816 kg (4,003 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 20959 . COSPAR: 1990-103A. Apogee: 20,384 km (12,666 mi). Perigee: 19,978 km (12,413 mi). Inclination: 54.9000 deg. Period: 717.90 min. Summary: Global Positioning System. Placed in Plane E Slot 5..

1991 July 4 - . 02:32 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Delta. Launch Vehicle: Delta 7925. LV Configuration: Delta 7925 D206.
  • USA 71 - . Payload: GPS 2A-11 / GPS SVN 24. Mass: 1,816 kg (4,003 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 21552 . COSPAR: 1991-047A. Apogee: 20,319 km (12,625 mi). Perigee: 20,043 km (12,454 mi). Inclination: 55.6000 deg. Period: 717.90 min. Summary: Global Positioning System. Placed in Plane D Slot 1..

1992 February 23 - . 22:29 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17B. LV Family: Delta. Launch Vehicle: Delta 7925. LV Configuration: Delta 7925 D207.
  • USA 79 - . Payload: GPS 2A-12 / GPS SVN 25. Mass: 1,816 kg (4,003 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 21890 . COSPAR: 1992-009A. Apogee: 20,332 km (12,633 mi). Perigee: 20,032 km (12,447 mi). Inclination: 54.2000 deg. Period: 718.00 min. Summary: Global Positioning System. Placed in Plane A Slot 2..

1992 April 10 - . 03:20 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17B. LV Family: Delta. Launch Vehicle: Delta 7925. LV Configuration: Delta 7925 D208.
  • USA 80 - . Payload: GPS 2A-13 / GPS SVN 28. Mass: 1,816 kg (4,003 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 21930 . COSPAR: 1992-019A. Apogee: 20,277 km (12,599 mi). Perigee: 20,082 km (12,478 mi). Inclination: 54.5000 deg. Period: 717.90 min. Summary: Global Positioning System. Retired 15 August 1997..

1992 July 7 - . 09:20 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17B. LV Family: Delta. Launch Vehicle: Delta 7925. LV Configuration: Delta 7925 D211.
  • USA 83 - . Payload: GPS 2A-14 / GPS SVN 26. Mass: 1,816 kg (4,003 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 22014 . COSPAR: 1992-039A. Apogee: 20,400 km (12,600 mi). Perigee: 19,962 km (12,403 mi). Inclination: 54.9000 deg. Period: 718.00 min. Summary: Global Positioning System. Placed in Plane F Slot 2..

1992 September 9 - . 08:57 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Delta. Launch Vehicle: Delta 7925. LV Configuration: Delta 7925 D214.
  • USA 84 - . Payload: GPS 2A-15 / GPS SVN 27. Mass: 1,816 kg (4,003 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 22108 . COSPAR: 1992-058A. Apogee: 20,453 km (12,708 mi). Perigee: 19,909 km (12,370 mi). Inclination: 54.5000 deg. Period: 718.00 min. Summary: Global Positioning System. Placed in Plane A Slot 4..

1992 November 22 - . 23:54 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Delta. Launch Vehicle: Delta 7925. LV Configuration: Delta 7925 D216.
  • USA 85 - . Payload: GPS 2A-16 / GPS SVN 32. Mass: 1,816 kg (4,003 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 22231 . COSPAR: 1992-079A. Apogee: 20,325 km (12,629 mi). Perigee: 20,038 km (12,451 mi). Inclination: 55.5000 deg. Period: 718.00 min. Summary: Global Positioning System. Placed in Plane F Slot 4..

1992 December 18 - . 22:16 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17B. LV Family: Delta. Launch Vehicle: Delta 7925. LV Configuration: Delta 7925 D217.
  • USA 87 - . Payload: GPS 2A-17 / GPS SVN 29. Mass: 1,816 kg (4,003 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 22275 . COSPAR: 1992-089A. Apogee: 20,324 km (12,628 mi). Perigee: 20,038 km (12,451 mi). Inclination: 54.7000 deg. Period: 718.00 min. Summary: Global Positioning System. Placed in Plane F Slot 5..

1993 February 3 - . 02:55 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Delta. Launch Vehicle: Delta 7925. LV Configuration: Delta 7925 D218.
  • USA 88 - . Payload: GPS 2A-18 / GPS SVN 22. Mass: 1,816 kg (4,003 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 22446 . COSPAR: 1993-007A. Apogee: 20,359 km (12,650 mi). Perigee: 20,006 km (12,431 mi). Inclination: 54.8000 deg. Period: 718.00 min. Summary: Global Positioning System. Placed in Plane Plane B Slot 1..

1993 March 30 - . 03:09 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Delta. Launch Vehicle: Delta 7925. LV Configuration: Delta 7925 D219.
  • USA 90 - . Payload: GPS 2A-19 / GPS SVN 31. Mass: 1,816 kg (4,003 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 22581 . COSPAR: 1993-017A. Apogee: 20,293 km (12,609 mi). Perigee: 20,072 km (12,472 mi). Inclination: 55.0000 deg. Period: 718.00 min. Summary: Global Positioning System. Placed in Plane C Slot 3..
  • SEDS 1 Deployer - . Payload: SEDS 1 Deployer. Nation: USA. Agency: MDAC. Program: Navstar. Spacecraft: SEDS. Decay Date: 1999-05-05 . USAF Sat Cat: 22583 . COSPAR: 1993-017C. Apogee: 1,292 km (802 mi). Perigee: 305 km (189 mi). Inclination: 36.1000 deg. Period: 100.84 min.

1993 May 13 - . 00:07 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Delta. Launch Vehicle: Delta 7925. LV Configuration: Delta 7925 D220.
  • USA 91 - . Payload: GPS 2A-20 / GPS SVN 37. Mass: 1,816 kg (4,003 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 22657 . COSPAR: 1993-032A. Apogee: 20,345 km (12,641 mi). Perigee: 20,017 km (12,437 mi). Inclination: 55.1000 deg. Period: 718.00 min. Summary: Global Positioning System. Placed in Plane C Slot 4..

1993 June 26 - . 13:27 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Delta. Launch Vehicle: Delta 7925. LV Configuration: Delta 7925 D221.
  • USA 92 - . Payload: GPS 2A-21 / GPS SVN 39. Mass: 1,816 kg (4,003 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 22700 . COSPAR: 1993-042A. Apogee: 20,250 km (12,580 mi). Perigee: 20,112 km (12,496 mi). Inclination: 54.6000 deg. Period: 717.90 min. Summary: Global Positioning System. Placed in Plane A Slot 1..
  • PMG Far End Package - . Nation: USA. Agency: MDSSC. Program: Navstar. Spacecraft: PMG. COSPAR: 1993-042xx.
  • PMG - . Payload: Plasma Motor Generator. Nation: USA. Agency: MDAC. Program: Navstar. Spacecraft: PMG. Decay Date: 1993-08-30 . USAF Sat Cat: 22701 . COSPAR: 1993-042B. Apogee: 677 km (420 mi). Perigee: 185 km (114 mi). Inclination: 25.7000 deg. Period: 93.20 min.

1993 August 30 - . 12:38 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17B. LV Family: Delta. Launch Vehicle: Delta 7925. LV Configuration: Delta 7925 D222.
  • USA 94 - . Payload: GPS 2A-22 / GPS SVN 35. Mass: 1,816 kg (4,003 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 22779 . COSPAR: 1993-054A. Apogee: 20,255 km (12,585 mi). Perigee: 20,110 km (12,490 mi). Inclination: 54.9000 deg. Period: 718.00 min. Summary: Global Positioning System. Placed in Plane B Slot 4..

1993 October 26 - . 17:04 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17B. LV Family: Delta. Launch Vehicle: Delta 7925. LV Configuration: Delta 7925 D223.
  • USA 96 - . Payload: GPS 2A-23 / GPS SVN 34. Mass: 1,816 kg (4,003 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 22877 . COSPAR: 1993-068A. Apogee: 20,260 km (12,580 mi). Perigee: 20,104 km (12,492 mi). Inclination: 55.1000 deg. Period: 718.00 min. Summary: Global Positioning System. Placed in Plane D Slot 4..

1994 March 10 - . 03:40 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Delta. Launch Vehicle: Delta 7925. LV Configuration: Delta 7925 D226.
  • USA 100 - . Payload: GPS 2A-24 / GPS SVN 36. Mass: 1,816 kg (4,003 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 23027 . COSPAR: 1994-016A. Apogee: 20,366 km (12,654 mi). Perigee: 20,000 km (12,000 mi). Inclination: 53.9000 deg. Period: 718.00 min. Summary: Final element of initial GPS constellation. Placed in Plane C Slot 1..
  • SEDS 2 Deployer - . Payload: SEDS 2 Deployer. Nation: USA. Agency: MDAC. Program: Navstar. Spacecraft: SEDS. Decay Date: 1994-05-08 . USAF Sat Cat: 23028 . COSPAR: 1994-016B. Apogee: 341 km (211 mi). Perigee: 340 km (210 mi). Inclination: 32.3000 deg. Period: 91.34 min.
  • SEDS 2 - . Payload: SEDS 2 End Mass. Nation: USA. Agency: MDSSC. Program: Navstar. Spacecraft: SEDS. COSPAR: 1994-016xx.

1996 March 28 - . 00:21 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17B. LV Family: Delta. Launch Vehicle: Delta 7925. LV Configuration: Delta 7925 D234.
  • USA 117 - . Payload: GPS 2A-25 / GPS SVN 33. Mass: 1,816 kg (4,003 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 23833 . COSPAR: 1996-019A. Apogee: 20,257 km (12,587 mi). Perigee: 20,106 km (12,493 mi). Inclination: 54.6000 deg. Period: 718.00 min. Summary: Placed in Plane C Slot 2 of the constellation..

1996 July 16 - . 00:50 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Delta. Launch Vehicle: Delta 7925. LV Configuration: Delta 7925 D237.
  • USA 126 - . Payload: GPS 2A-26 / GPS SVN 40. Mass: 1,816 kg (4,003 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 23953 . COSPAR: 1996-041A. Apogee: 20,237 km (12,574 mi). Perigee: 20,127 km (12,506 mi). Inclination: 55.1000 deg. Period: 717.90 min. Summary: Placed in Plane E Slot 3 of the constellation..

1996 September 12 - . 08:49 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Delta. Launch Vehicle: Delta 7925. LV Configuration: Delta 7925 D238.
  • USA 128 - . Payload: GPS 2A-27 / GPS SVN 30. Mass: 1,816 kg (4,003 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 24320 . COSPAR: 1996-056A. Apogee: 20,320 km (12,620 mi). Perigee: 20,042 km (12,453 mi). Inclination: 54.7000 deg. Period: 718.00 min. Summary: Placed in Plane B Slot 2 of the constellation..

1997 January 17 - . 16:28 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Delta. Launch Vehicle: Delta 7925. LV Configuration: Delta 7925 D241. FAILURE: T+12 sec GEM strap-on number 2 structural failure.. Failed Stage: 0.
  • GPS 42 - . Payload: GPS 2R-1 / GPS SVN 42. Mass: 2,030 kg (4,470 lb). Nation: USA. Agency: MDSSC. Manufacturer: Valley Forge. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2R. COSPAR: F970117A. Summary: Destroyed in launch vehicle failure..

1997 July 23 - . 03:43 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Delta. Launch Vehicle: Delta 7925. LV Configuration: Delta 7925 D245.
  • USA 132 - . Payload: GPS 2R-2 / GPS SVN 43. Mass: 2,030 kg (4,470 lb). Nation: USA. Agency: USAF. Manufacturer: Valley Forge. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2R. USAF Sat Cat: 24876 . COSPAR: 1997-035A. Apogee: 20,235 km (12,573 mi). Perigee: 20,132 km (12,509 mi). Inclination: 55.8000 deg. Period: 718.00 min. Summary: Placed in Plane F Slot 3 of the constellation..

1997 November 6 - . 00:30 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Delta. Launch Vehicle: Delta 7925. LV Configuration: Delta 7925 D249.
  • USA 134 - . Payload: GPS 2A-28 / GPS SVN 38. Mass: 1,816 kg (4,003 lb). Nation: USA. Agency: USAF. Manufacturer: Seal Beach. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2 and 2A. USAF Sat Cat: 25030 . COSPAR: 1997-067A. Apogee: 20,394 km (12,672 mi). Perigee: 19,970 km (12,400 mi). Inclination: 55.0000 deg. Period: 718.00 min. Summary: Final GPS Block 2A satellite. Placed in Plane A Slot 3..

1999 October 7 - . 12:51 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. Launch Pad: SLC17A. LV Family: Delta. Launch Vehicle: Delta 7925-9.5. LV Configuration: Delta 7925-9.5 D275.
  • USA 145 - . Payload: GPS 2R-3 / GPS SVN 46. Mass: 2,030 kg (4,470 lb). Nation: USA. Agency: USAF. Manufacturer: Valley Forge. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2R. USAF Sat Cat: 25933 . COSPAR: 1999-055A. Apogee: 20,202 km (12,552 mi). Perigee: 20,163 km (12,528 mi). Inclination: 52.6000 deg. Period: 718.00 min. Summary: Third GPS Block 2R satellite. SVN 46 replaced SVN 50 which had been damaged by rain on Pad 17 earlier while being prepared for launch earlier in the year. Placed in Plane D Slot 2..

2000 May 11 - . 01:48 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. Launch Pad: SLC17A. LV Family: Delta. Launch Vehicle: Delta 7925-9.5. LV Configuration: Delta 7925-9.5 D278.
  • USA 150 - . Payload: GPS 2R-4 / GPS SVN 51. Mass: 2,030 kg (4,470 lb). Nation: USA. Agency: USAF. Manufacturer: Lockheed. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2R. USAF Sat Cat: 26360 . COSPAR: 2000-025A. Apogee: 20,235 km (12,573 mi). Perigee: 20,127 km (12,506 mi). Inclination: 55.2000 deg. Period: 717.90 min. Summary: Placed into an elliptical transfer orbit. The satellite's Thiokol Star 37 apogee motor was used to circularise the orbit at 20,000 km in Plane E Slot 1 of the constellation, replacing GPS GPS 2-1..

2000 July 16 - . 09:17 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. Launch Pad: SLC17A. LV Family: Delta. Launch Vehicle: Delta 7925-9.5. LV Configuration: Delta 7925-9.5 D279.
  • USA 151 - . Payload: GPS 2R-5 / GPS SVN 44. Mass: 2,032 kg (4,479 lb). Nation: USA. Agency: USAF. Manufacturer: Lockheed. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2R. USAF Sat Cat: 26407 . COSPAR: 2000-040A. Apogee: 20,650 km (12,830 mi). Perigee: 19,715 km (12,250 mi). Inclination: 56.0000 deg. Period: 718.00 min. Summary: Global Positioning satellite, placed in Plane B Slot 5. Launch delayed from June 15 and the June 21..

2000 November 10 - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. Launch Pad: SLC17A. LV Family: Delta. Launch Vehicle: Delta 7925-9.5. LV Configuration: Delta 7925-9.5 D281.
  • USA 154 - . Payload: GPS 2R-6 / GPS SVN 41. Mass: 2,032 kg (4,479 lb). Nation: USA. Agency: USAF. Manufacturer: Lockheed. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2R. USAF Sat Cat: 26605 . COSPAR: 2000-071A. Apogee: 20,244 km (12,579 mi). Perigee: 20,118 km (12,500 mi). Inclination: 55.5000 deg. Period: 717.90 min. The Delta stage 2 entered a 153 x 418 km x 37 deg parking orbit followed by a 172 x 1144 km second orbit; the PAM-D solid upper stage then fired to give SVN 41 a 20457 km apogee. The Thiokol Star 37FM solid kick motor was fired prior to November 13 to place the spacecraft in its final circular 20,000 km orbit. Placed in Plane F Slot 1 of the GPS constellation.

2001 January 30 - . 07:55 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. Launch Pad: SLC17A. LV Family: Delta. Launch Vehicle: Delta 7925-9.5. LV Configuration: Delta 7925-9.5 D283.
  • USA 156 - . Payload: GPS 2R-7 / GPS SVN 54. Mass: 2,032 kg (4,479 lb). Nation: USA. Agency: USAF. Manufacturer: Lockheed. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2R. USAF Sat Cat: 26690 . COSPAR: 2001-004A. Apogee: 20,208 km (12,556 mi). Perigee: 20,157 km (12,524 mi). Inclination: 55.2000 deg. Period: 718.00 min. Summary: GPS Block IIR production no. SV 14. Placed in Plane E Slot 4 of the constellation..

2003 January 29 - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17B. Launch Pad: SLC17B. LV Family: Delta. Launch Vehicle: Delta 7925-9.5. LV Configuration: Delta 7925-9.5 D295.
  • USA 166 - . Payload: GPS 2R-8 / Navstar 51. Mass: 2,032 kg (4,479 lb). Nation: USA. Agency: USAF. Manufacturer: Lockheed. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2R. USAF Sat Cat: 27663 . COSPAR: 2003-005A. Apogee: 20,352 km (12,646 mi). Perigee: 20,163 km (12,528 mi). Inclination: 55.0570 deg. Period: 720.74 min. Summary: Launch delayed from June 11 and August 16, 2001; March 6, April 29, August 11 and November 7, 2002..

2003 March 31 - . 22:09 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. Launch Pad: SLC17A. LV Family: Delta. Launch Vehicle: Delta 7925-9.5. LV Configuration: Delta 7925-9.5 D297.
  • USA 168 - . Payload: GPS 2R-9 / Navstar 52. Mass: 2,032 kg (4,479 lb). Nation: USA. Agency: USAF. Manufacturer: Lockheed. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2R. USAF Sat Cat: 27704 . COSPAR: 2003-010A. Apogee: 20,376 km (12,661 mi). Perigee: 19,985 km (12,418 mi). Inclination: 55.0000 deg. Period: 717.90 min. Summary: Delayed from May 16, July 25, November 14, 2002, and February 6, 2003. Timely replenishment of GPS constellation..

2003 December 21 - . 08:05 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. Launch Pad: SLC17A. LV Family: Delta. Launch Vehicle: Delta 7925. LV Configuration: Delta 7925-9.5 D302.
  • USA 175 - . Payload: GPS 2R-10 / Navstar 53 / GPS SVN 47. Mass: 2,032 kg (4,479 lb). Nation: USA. Agency: USAF. Manufacturer: Lockheed. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2R. USAF Sat Cat: 28129 . COSPAR: 2003-058A. Apogee: 20,328 km (12,631 mi). Perigee: 19,963 km (12,404 mi). Inclination: 55.1000 deg. Period: 716.50 min. Summary: Tenth Navstar Block IIR (R = replenishment) launch..

2004 March 20 - . 17:53 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17B. Launch Pad: SLC17B. LV Family: Delta. Launch Vehicle: Delta 7925-9.5. LV Configuration: Delta 7925-9.5 D303.
  • USA 177 - . Payload: GPS 2R-11 / Navstar 54. Mass: 2,032 kg (4,479 lb). Nation: USA. Agency: USAF. Manufacturer: Lockheed. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2R. USAF Sat Cat: 28190 . COSPAR: 2004-009A. Apogee: 20,268 km (12,593 mi). Perigee: 20,100 km (12,400 mi). Inclination: 55.0000 deg. Period: 718.00 min. Summary: Launch delayed from December 19, 2003, March 8, 2004..

2004 June 23 - . 22:54 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17B. Launch Pad: SLC17B. LV Family: Delta. Launch Vehicle: Delta 7925-9.5. LV Configuration: Delta 7925-9.5 D305.
  • USA 178 - . Payload: GPS 2R-12 / Navstar 55. Mass: 2,032 kg (4,479 lb). Nation: USA. Agency: USAF. Manufacturer: Lockheed. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2R. USAF Sat Cat: 28361 . COSPAR: 2004-023A. Apogee: 20,273 km (12,597 mi). Perigee: 20,090 km (12,480 mi). Inclination: 55.1000 deg. Period: 717.90 min. Summary: Delayed from February 17. Delayed from June 5, 11, 13, 14, 16, 18, 19, 20 and 21. Moved up from July 20..

2004 November 6 - . 05:39 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17B. Launch Pad: SLC17B. LV Family: Delta. Launch Vehicle: Delta 7925-9.5. LV Configuration: Delta 7925-9.5 D308.
  • USA 180 - . Payload: GPS 2R-13 / Navstar 61. Mass: 2,032 kg (4,479 lb). Nation: USA. Agency: USAF. Manufacturer: Lockheed. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2R. USAF Sat Cat: 28474 . COSPAR: 2004-045A. Apogee: 20,413 km (12,684 mi). Perigee: 19,810 km (12,300 mi). Inclination: 54.9000 deg. Period: 715.10 min. Summary: Launch delayed from September 22, October 8, 25 and 30, November 5. Fired its apogee motor at around 02:40 GMT on November 9 to transfer from its initial 159 x 20380 km x 39.1 deg transfer orbit to its operational orbit in the GPS constellation..

2005 September 26 - . 03:37 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. Launch Pad: SLC17A. LV Family: Delta. Launch Vehicle: Delta 7925-9.5. LV Configuration: Delta 7925-9.5 D313.
  • USA 183 - . Payload: GPS 2R-14M / Navstar 57. Mass: 2,032 kg (4,479 lb). Nation: USA. Agency: USAF. Manufacturer: Lockheed. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2R. USAF Sat Cat: 28874 . COSPAR: 2005-038A. Apogee: 20,187 km (12,543 mi). Perigee: 20,006 km (12,431 mi). Inclination: 55.0000 deg. Period: 714.50 min. Delayed from December 2004; February 1, March 17, 2005. Moved up from May 20 2005. Then delayed from May 4, July 29, August 26, September 22, 2005. Became operational at 23:30 GMT on 16 December. First GPS Block IIR-M version, which added extra navigation signals for both civil and military users. The NASA-funded L2C tracking demonstration was managed by JPL and explored the use of a new Civilian code signal (L2C). The data was collected with Trimble NetRS receivers L2C-enabled firmware. The sites were globally distributed: South Africa, Norway, Antarctica, Hawaii, and Alaska.

2006 September 25 - . 18:50 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. Launch Pad: SLC17A. LV Family: Delta. Launch Vehicle: Delta 7925-9.5. LV Configuration: Delta 7925-9.5 D318.
  • USA 190 - . Payload: GPS 2R-15M / Navstar 52. Mass: 2,032 kg (4,479 lb). Nation: USA. Agency: Seal Beach. Manufacturer: Lockheed. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2R. USAF Sat Cat: 29486 . COSPAR: 2006-042A. Apogee: 20,342 km (12,639 mi). Perigee: 20,020 km (12,430 mi). Inclination: 54.9000 deg. Period: 717.90 min. Summary: Second GPS Block IIR-M version, which added extra navigation signals for both civil and military users..

2006 November 17 - . 19:12 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. Launch Pad: SLC17A. LV Family: Delta. Launch Vehicle: Delta 7925-9.5. LV Configuration: Delta 7925-9.5 D321.
  • USA 192 - . Payload: GPS 2R-16M / Navstar 59. Mass: 2,032 kg (4,479 lb). Nation: USA. Agency: USAF. Manufacturer: Lockheed. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2R. USAF Sat Cat: 29601 . COSPAR: 2006-052A. Apogee: 20,367 km (12,655 mi). Range: 55 km (34 mi). Perigee: 20,206 km (12,555 mi). Inclination: 54.9000 deg. Period: 722.20 min. Summary: Set operational at 03:07 GMT on 12 December..

2007 October 17 - . 12:23 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. Launch Pad: SLC17A. LV Family: Delta. Launch Vehicle: Delta 7925. LV Configuration: Delta 7925-9.5 D328.
  • USA 196 - . Payload: GPS 2R-17M / Navstar 55. Mass: 2,032 kg (4,479 lb). Nation: USA. Agency: USAF. Manufacturer: Lockheed. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2R. USAF Sat Cat: 32260 . COSPAR: 2007-047A. Apogee: 20,213 km (12,559 mi). Perigee: 20,149 km (12,519 mi). Inclination: 54.9000 deg. Period: 717.90 min. Summary: Set operational at 22:46 GMT on 31 October..

2007 December 20 - . 20:04 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. Launch Pad: SLC17A. LV Family: Delta. Launch Vehicle: Delta 7925. LV Configuration: Delta 7925-9.5 D331.
  • USA 199 - . Payload: GPS 2R-5M / Navstar 61. Nation: USA. Agency: Martin. Manufacturer: Lockheed. Program: Navstar. Class: Navigation. Type: Navigation satellite. Spacecraft: GPS Block 2R. USAF Sat Cat: 32384 . COSPAR: 2007-062A. Apogee: 20,283 km (12,603 mi). Perigee: 20,082 km (12,478 mi). Inclination: 55.0000 deg. Period: 718.00 min. Summary: Fifth GPS SV with L2C capability..

Home - Browse - Contact
© / Conditions for Use