USA-38

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USA-38
NamesNavstar 2-02
GPS II-2
GPS SVN-13
Mission type Navigation
Operator U.S. Air Force
COSPAR ID 1989-044A OOjs UI icon edit-ltr-progressive.svg
SATCAT no. 20061
Mission duration7.5 years (planned)
15 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 date10 June 1989, 22:19 UTC
Rocket Delta II 6925-9.5
(Delta D185) [3]
Launch site Cape Canaveral, LC-17A
Contractor McDonnell Douglas
Entered serviceJuly 1989
End of mission
Deactivated12 February 2004
Orbital parameters
Reference system Geocentric orbit
Regime Medium Earth orbit
(Semi-synchronous)
SlotB3 (slot 3 plane B)
Perigee altitude 19,967 km (12,407 mi)
Apogee altitude 20,395 km (12,673 mi)
Inclination 54.5°
Period 717.92 minutes
←  USA-35 (GPS II-1)
USA-42 (GPS II-3) →
 

USA-38, also known as GPS II-2 and GPS SVN-13, was an American navigation satellite which formed part of the Global Positioning System. It was the second of nine Block II GPS satellites to be launched, which were the first operational GPS satellites to be launched.

Contents

Background

It was part of the 21-satellite Global Positioning System (GPS) Block II series that provides precise position data (accurate to within 16 m) to military and civilian users worldwide. Its signals could be received on devices as small as a telephone. The GPS II satellites, built by Rockwell International for the Air Force Space Systems Division, each have a 7.5-year design life. The Air Force intends to launch a GPS II every two to three months until the constellation of 21 operational satellites and three spares is aloft. The GPS Block II joins seven operational Block 1 satellites. [2]

Launch

USA-38 was launched at 22:19 UTC on 10 June 1989, atop a Delta II launch vehicle, flight number D185, flying in the 6925-9.5 configuration. [3] The launch took place from Launch Complex 17A (LC-17A) at the Cape Canaveral Air Force Station (CCAFS), [4] and placed USA-38 into a transfer orbit. The satellite raised itself into medium Earth orbit using a Star-37XFP apogee motor. [1]

Mission

On 11 July 1989, USA-38 was in an orbit with a perigee of 19,967 km (12,407 mi), an apogee of 20,395 km (12,673 mi), a period of 717.92 minutes, and 54.5° of inclination to the equator. [5] It operated in slot 3 of plane B 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] and was deactivated on 12 February 2004.

Related Research Articles

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<span class="mw-page-title-main">USA-132</span> American navigation satellite used for GPS

USA-132, also known as GPS IIR-2 and GPS SVN-43, is an American navigation satellite which forms part of the Global Positioning System. It was the second Block IIR GPS satellite to be launched, out of thirteen in the original configuration, and twenty one overall. GPS IIR-1 failed to achieve orbit, so USA-132 was the first successful Block IIR satellite. It was built by Lockheed Martin, using the AS-4000 satellite bus.

References

  1. 1 2 3 Krebs, Gunter. "GPS-II". Gunter's Space Page. Retrieved 10 July 2012.
  2. 1 2 3 "Display: Navstar 2-02 1989-044A". US National Space Science Data Center. NASA. Retrieved 10 July 2012.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 Report. Retrieved 10 July 2012.
  4. ↑ McDowell, Jonathan. "Launch List". Launch Vehicle Database. Jonathan's Space Report. Retrieved 10 July 2012.
  5. ↑ McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Report. Retrieved 10 July 2012.
  6. ↑ "NAVSTAR GPS - Summary". Space and Tech. Archived from the original on 15 June 2012. Retrieved 10 July 2012.
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