To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

4,5
Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
Added in 24 Hours
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.
.
Leo
Newton
Brights
Milds

From Wikipedia, the free encyclopedia

USA-206
GPS-IIRM.jpg
Artist's impression of a GPS IIRM satellite in orbit
Mission typeNavigation
OperatorUS Air Force
COSPAR ID2009-043A
SATCAT no.35752
Mission duration10 years (planned)
Spacecraft properties
Spacecraft typeGPS Block IIRM
BusAS-4000
ManufacturerLockheed Martin
Launch mass2,032 kilograms (4,480 lb)
Start of mission
Launch date17 August 2009, 10:35:00 (2009-08-17UTC10:35Z) UTC
RocketDelta II 7925-9.5, D343
Launch siteCape Canaveral SLC-17A
ContractorULA
Orbital parameters
Reference systemGeocentric
RegimeMedium Earth
(Semi-synchronous)
Perigee altitude20,200 kilometres (12,600 mi)
Apogee altitude20,200 kilometres (12,600 mi)
Inclination55 degrees
Period12 hours
 

USA-206,[1] also GPS SVN-50, PRN-05 and NAVSTAR 64 and known before launch as GPS IIR-21, GPS IIRM-8 or GPS IIR-21(M), is an American navigation satellite which forms part of the Navstar Global Positioning System. It was the twenty-first and last Block IIR GPS satellite to be launched, and the eighth to use the modernised IIRM configuration.[2]

GPS IIR-21 was built by Lockheed Martin, based on the AS-4000 satellite bus, with the navigation payload being built by ITT.[2] It was launched by a United Launch Alliance Delta II rocket, using the 7925-9.5 configuration,[3] on 17 August 2009 at 10:35 GMT.[4] It was the last spacecraft to launch from Space Launch Complex 17A at the Cape Canaveral Air Force Station, a launch pad which was first used in August 1957 for test flights of the PGM-17 Thor missile.[5] It is also the final flight of an AS-4000 bus,[6] the final GPS launch on a Delta II, and the final Delta II launch to be overseen by the US Air Force.[3]

Following separation from its carrier rocket, GPS IIR-21 received its USA designation, USA-206. It was deployed into a transfer orbit, from which raised itself to a semi-synchronous medium Earth orbit on 19 August, using an onboard Star 37FM apogee motor. It is a 2,032-kilogram (4,480 lb) satellite,[1] and is expected to operate for at least ten years.[3] Once it had completed on-orbit testing, it began covering Slot 3 of Plane E of the GPS constellation, replacing USA-126, or GPS IIA-26, which was launched in July 1996.[4] It was declared operational on 27 August 2009.[7]

References

  1. ^ a b Krebs, Gunter. "Navstar 2RM". Gunter's Space Page. Retrieved 15 August 2009.
  2. ^ a b "Final LockMart Modernized GPS IIR Satellite Set For Launch". GPS Daily. 11 August 2009. Retrieved 15 August 2009.
  3. ^ a b c "Delta II GPS IIR-21 Mission Booklet" (PDF). United Launch Alliance. Retrieved 5 July 2020.
  4. ^ a b Ray, Justin. "Mission Status Center". Delta Launch Report. Spaceflight Now. Retrieved 15 August 2009.
  5. ^ Ray, Justin (24 March 2009). "Delta 2 rocket delivers another GPS satellite to orbit". Spaceflight Now. Retrieved 13 August 2009.
  6. ^ Krebs, Gunter. "Martin Marietta -> Lockheed Martin: 4000". Gunter's Space Page. Retrieved 15 August 2009.
  7. ^ "Air Force Sets Latest GPS Satellite Operational". Inside GNSS. 27 August 2009. Archived from the original on 6 December 2010. Retrieved 6 September 2009.
This page was last edited on 18 December 2020, at 08:16
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.