USA-64

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USA-64
NamesNavstar 2-09
GPS II-9
GPS SVN-15
Mission type Navigation
Operator U.S. Air Force
COSPAR ID 1990-088A OOjs UI icon edit-ltr-progressive.svg
SATCAT no. 20830
Mission duration7.5 years (planned)
16.5 years (achieved)
Spacecraft properties
Spacecraft GPS II
Spacecraft type GPS Block II [1]
Manufacturer Rockwell International
Launch mass840 kg (1,850 lb) [2]
Dimensions5.3 m (17 ft) of long
Power710 watts
Start of mission
Launch date1 October 1990, 21:56:00 UTC
Rocket Delta II 6925-9.5
(Delta D199) [3]
Launch site Cape Canaveral, LC-17A
Contractor McDonnell Douglas
Entered service31 October 1990
End of mission
Declared17 November 2006
Deactivated14 March 2007
Orbital parameters
Reference system Geocentric orbit [4]
Regime Medium Earth orbit
(Semi-synchronous)
SlotD5 (slot 5 plane D)
Perigee altitude 19,972 km (12,410 mi)
Apogee altitude 20,390 km (12,670 mi)
Inclination 54.9°
Period 717.94 minutes
←  USA-63 (GPS II-8)
USA-66 (GPS II-10) →

USA-64, also known as GPS II-9 and GPS SVN-15, was an American navigation satellite which formed part of the Global Positioning System. It was the last of nine Block II GPS satellites to be launched, which were the first operational GPS satellites to fly. It was also the last Block II satellite to be retired from service.

Contents

Background

Global Positioning System (GPS) was developed by the U.S. Department of Defense to provide all-weather round-the-clock navigation capabilities for military ground, sea, and air forces. Since its implementation, GPS has also become an integral asset in numerous civilian applications and industries around the globe, including recreational used (e.g., boating, aircraft, hiking), corporate vehicle fleet tracking, and surveying. GPS employs 24 spacecraft in 20,200 km circular orbits inclined at 55.0°. These vehicles are placed in 6 orbit planes with four operational satellites in each plane. [2]

GPS Block 2 was the operational system, following the demonstration system composed of Block 1 (Navstar 1 - 11) spacecraft. These spacecraft were 3-axis stabilized, nadir pointing using reaction wheels. Dual solar arrays supplied 710 watts of power. They used S-band (SGLS) communications for control and telemetry and Ultra high frequency (UHF) cross-link between spacecraft. The payload consisted of two L-band navigation signals at 1575.42 MHz (L1) and 1227.60 MHz (L2). Each spacecraft carried 2 rubidium and 2 Cesium clocks and nuclear detonation detection sensors. Built by Rockwell Space Systems for the U.S. Air force, the spacecraft measured 5.3 m across with solar panels deployed and had a design life of 7.5 years. [2]

Launch

USA-64 was launched at 21:56:00 UTC on 1 October 1990, atop a Delta II launch vehicle, flight number D199, flying in the 6925 configuration. [3] The launch took place from Launch Complex 17A (LC-17A) at the Cape Canaveral Air Force Station (CCAFS), [5] and placed USA-64 into a transfer orbit. The satellite raised itself into medium Earth orbit using a Star-37XFP apogee motor. [1]

Mission

On 31 October 1990, USA-64 was in an orbit with a perigee of 19,972 km (12,410 mi), an apogee of 20,390 km (12,670 mi), a period of 717.94 minutes, and 54.9° of inclination to the equator. [4] It operated in slot 5 of plane D of the GPS constellation. [6] The satellite had a mass of 840 kg (1,850 lb), and generated 710 watts of power. [2] It had a design life of 7.5 years, [1] having been added from active service on 17 November 2006 for testing, and ceased operations on 14 March 2007.

Related Research Articles

USA-87, also known as GPS IIA-8, GPS II-17 and GPS SVN-29, was an American navigation satellite which formed part of the Global Positioning System. It was the eighth of nineteen Block IIA GPS satellites to be launched.

USA-54, also known as GPS II-7 and GPS SVN-20, was an American navigation satellite which formed part of the Global Positioning System. It was the seventh of nine Block II GPS satellites to be launched, which were the first operational GPS satellites to fly.

USA-63, also known as GPS II-8 and GPS SVN-21, was an American navigation satellite which formed part of the Global Positioning System. It was the eighth of nine Block II GPS satellites to be launched, which were the first operational GPS satellites to fly.

USA-66, also known as GPS IIA-1, GPS II-10 and GPS SVN-23, was an American navigation satellite which formed part of the Global Positioning System. It was the first of nineteen Block IIA GPS satellites to be launched, and was the oldest GPS satellite still in operation until its decommissioning on 25 January 2016.

USA-71, also known as GPS IIA-2, GPS II-11 and GPS SVN-24, is an American navigation satellite which forms part of the Global Positioning System. It was the second of nineteen Block IIA GPS satellites to be launched.

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USA-80, also known as GPS IIA-4, GPS II-13 and GPS SVN-28, was an American navigation satellite which formed part of the Global Positioning System. It was the fourth of nineteen Block IIA GPS satellites to be launched.

USA-83, also known as GPS IIA-5, GPS II-14 and GPS SVN-26, is an American navigation satellite which forms part of the Global Positioning System. It was the fifth of nineteen Block IIA GPS satellites to be launched.

USA-84, also known as GPS IIA-6, GPS II-15 and GPS SVN-27, is an American navigation satellite which forms part of the Global Positioning System. It was the sixth of nineteen Block IIA GPS satellites to be launched.

USA-85, also known as GPS IIA-7, GPS II-16 and GPS SVN-32, was an American navigation satellite which formed part of the Global Positioning System. It was the seventh of nineteen Block IIA GPS satellites to be launched.

USA-88, also known as GPS IIA-9, GPS II-18 and GPS SVN-22, was an American navigation satellite which formed part of the Global Positioning System. It was the ninth of nineteen Block IIA GPS satellites to be launched.

USA-90, also known as GPS IIA-10, GPS II-19 and GPS SVN-31, was an American navigation satellite which formed part of the Global Positioning System. It was the tenth of nineteen Block IIA GPS satellites to be launched.

USA-91, also known as GPS IIA-11, GPS II-20 and GPS SVN-37, was an American navigation satellite which formed part of the Global Positioning System. It was the eleventh of nineteen Block IIA GPS satellites to be launched.

USA-92, also known as GPS IIA-12, GPS II-21, GPS SVN-39, and NAVSTAR 39, is an American navigation satellite which forms part of the Global Positioning System. It was the twelfth of nineteen Block IIA GPS satellites to be launched.

USA-94, also known as GPS IIA-13, GPS II-22 and GPS SVN-35, was an American navigation satellite which formed part of the Global Positioning System. It was the thirteenth of nineteen Block IIA GPS satellites to be launched.

USA-100, also known as GPS IIA-15, GPS II-24 and GPS SVN-36, is an American navigation satellite which forms part of the Global Positioning System. It was the fifteenth of nineteen Block IIA GPS satellites to be launched.

USA-117, also known as GPS IIA-16, GPS II-25 and GPS SVN-33, is an American navigation satellite which forms part of the Global Positioning System. It was the sixteenth of nineteen Block IIA GPS satellites to be launched.

USA-126, also known as GPS IIA-17, GPS II-26 and GPS SVN-40, is an American navigation satellite which forms part of the Global Positioning System. It was the seventeenth of nineteen Block IIA GPS satellites to be launched.

USA-128, also known as GPS IIA-18, GPS II-27 and GPS SVN-30, is an American navigation satellite which forms part of the Global Positioning System. It was the eighteenth of nineteen Block IIA GPS satellites to be launched.

USA-135, also known as GPS IIA-19, GPS II-28 and GPS SVN-38, is an American navigation satellite which forms part of the Global Positioning System. It was the last of nineteen Block IIA GPS satellites to be launched.

References

  1. 1 2 3 Krebs, Gunter. "GPS-2 (Navstar-2)". Gunter's Space Page. Retrieved 10 July 2012.
  2. 1 2 3 4 "Display: Navstar 2-09 1990-088A". NASA. 14 May 2020. Retrieved 18 December 2020.PD-icon.svg This article incorporates text from this source, which is in the public domain .
  3. 1 2 McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 10 July 2012.
  4. 1 2 McDowell, Jonathan C. "satcat". General Catalog of Artificial Space Objects. Archived from the original on 16 March 2023. Retrieved 4 April 2023.
  5. ↑ McDowell, Jonathan. "Launch List". Launch Vehicle Database. Jonathan's Space Page. Archived from the original on 15 August 2020. Retrieved 10 July 2012.
  6. ↑ Wade, Mark. "Navstar". Encyclopedia Astronautica. Archived from the original on 11 November 2002. Retrieved 10 July 2012.
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