USA-206

Artist's impression of a GPS IIRM satellite in orbit

Mission type| Navigation
Operator| US Air Force
COSPAR ID| 2009-043A
SATCAT no.| 35752
Mission duration| 10 years (planned)
Spacecraft properties
Spacecraft type| GPS Block IIRM
Bus| AS-4000
Manufacturer| Lockheed Martin
Launch mass| 2,032 kilograms (4,480 lb)
Start of mission
Launch date| 17 August 2009, 10:35:00 (2009-08-17UTC10:35Z) UTC
Rocket| Delta II 7925-9.5, D343
Launch site| Cape Canaveral SLC-17A
Contractor| ULA
Orbital parameters
Reference system| Geocentric
Regime| Medium Earth
(Semi-synchronous)
Perigee altitude| 20,200 kilometers (12,600 mi)
Apogee altitude| 20,200 kilometers (12,600 mi)
Inclination| 55 degrees
Period| 12 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 that 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 modernized IIRM configuration.[2]

File:310th Space Wing GPS Satellite Launch.jpgLaunch of USA-206

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. ↑ 1.0 1.1 Krebs, Gunter. "Navstar 2RM". Gunter's Space Page. http://space.skyrocket.de/doc_sdat/navstar-2rm.htm.
2. ↑ 2.0 2.1 "Final LockMart Modernized GPS IIR Satellite Set For Launch". GPS Daily. 2009-08-11. http://www.gpsdaily.com/reports/Final_LockMart_Modernized_GPS_IIR_Satellite_Set_For_Launch_999.html.
3. ↑ 3.0 3.1 3.2 "Delta II GPS IIR-21 Mission Booklet". https://www.ulalaunch.com/docs/default-source/news-items/dii_gpsiir21_mob.pdf?sfvrsn=152ff291_2.
4. ↑ 4.0 4.1 Ray, Justin. "Mission Status Center". Delta Launch Report. Spaceflight Now. http://www.spaceflightnow.com/delta/d343/status.html.
5. ↑ Ray, Justin (2009-03-24). "Delta 2 rocket delivers another GPS satellite to orbit". Spaceflight Now. http://spaceflightnow.com/delta/d340/.
6. ↑ Krebs, Gunter. "Martin Marietta -> Lockheed Martin: 4000". Gunter's Space Page. http://space.skyrocket.de/doc_sat/lockheed_4000.htm.
7. ↑ "Air Force Sets Latest GPS Satellite Operational". Inside GNSS. 2009-08-27. http://www.insidegnss.com/node/1641. Retrieved 2009-09-06.

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NAVSTAR Global Positioning System satellites

List of GPS satellites

Block I|

* 1
* 2
* 3
* 4
* 5
* 6
* 7†
* 8
* 9
* 10
* 11

Block II|

* 1
* 2
* 3
* 4
* 5
* 6
* 7
* 8
* 9

Block IIA|

* 1
* 2
* 3
* 4
* 5
* 6
* 7
* 8
* 9
* 10
* 11
* 12
* 13
* 14
* 15
* 16
* 17
* 18
* 19

Block IIR|

* 1†
* 2
* 3
* 4
* 5
* 6
* 7
* 8
* 9
* 10
* 11
* 12
* 13
* 14
* 15
* 16
* 17
* 18
* 19
* 20
* 21

Block IIRM|

* 1
* 2
* 3
* 4
* 5
* 6
* 7
* 8

Block IIF|

* 1
* 2
* 3
* 4
* 5
* 6
* 7
* 8
* 9
* 10
* 11
* 12

Block III|

* 01
* 02
* 03
* 04
* 05
* 06
* 07
* 08
* 09
* 10

Block IIIF|

* 01
* 02
* 03
* 04
* 05
* 06
* 07
* 08
* 09
* 10
* 11
* 12
* 13
* 14
* 15
* 16
* 17
* 18
* 19
* 20
* 21
* 22

Italics indicate future missions. Signs † indicate launch failures.

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Orbital launches in 2009

USA-202 | Ibuki * SDS-1 * Sohla-1 * Raijin * Kagayaki * Hitomi * Kukai * Kiseki | Koronas-Foton | Omid | NOAA-19 | Progress M-66 | Ekspress-AM44 * Ekspress MD1 | Hot Bird 10 * NSS-9 * Spirale-A * Spirale-B | OCO | Telstar 11N | Raduga-1 | Kepler | STS-119 (ITS S6) | GOCE | USA-203 | Soyuz TMA-14 | Eutelsat W2A | USA-204 | Kwangmyŏngsŏng-2 | Compass-G2 | RISAT-2 * ANUSAT | SICRAL 1B | Yaogan 6 | Kosmos 2450 | USA-205 | Progress M-02M | STS-125 | Herschel * Planck | ProtoStar 2 | TacSat-3 * PharmaSat * AeroCube 3 * HawkSat I * CP6 | Meridian 2 | Soyuz TMA-15 | LRO * LCROSS | MEASAT-3a | GOES 14 | Sirius FM-5 | TerreStar-1 | Kosmos 2451 * Kosmos 2452 * Kosmos 2453 | RazakSAT | STS-127 (JEM-EF * AggieSat 2 * BEVO-1 * Castor * Pollux) | Kosmos 2454 * Sterkh No.11L | Progress M-67 | DubaiSat-1 * Deimos-1 * UK-DMC 2 * Nanosat-1B * AprizeSat-3 * AprizeSat-4 | AsiaSat 5 | USA-206 | JCSAT-RA * Optus D3 | STSAT-2A | STS-128 (Leonardo MPLM) | Palapa-D | USA-207 | HTV-1 | Meteor-M No.1 * Universitetsky-Tatyana-2 * Sterkh-2 * UGATUSAT * BLITS * SumbandilaSat * IRIS | Nimiq 5 | Oceansat-2 * BeeSat-1 * UWE-2 * ITU-pSat1 * SwissCube-1 * Rubin 9.1 * Rubin 9.2 | USA-208 * USA-209 | Soyuz TMA-16 | Amazonas-2 * COMSATBw-1 | WorldView-2 | Progress M-03M | USA-210 | Thor 6 * NSS-12 | SMOS * PROBA-2 | Progress M-MIM2 (Poisk) | Shijian 11-01 | STS-129 (ExPRESS-1 * ExPRESS-2) | Kosmos 2455 | Intelsat 14 | Eutelsat W7 | IGS Optical 3 | Intelsat 15 | USA-211 | Yaogan 7 | Kosmos 2456 * Kosmos 2457 * Kosmos 2458 | Yaogan 8 * Xi Wang 1 | Helios IIB | Soyuz TMA-17 | DirecTV-12

Payloads are separated by bullets ( * ), launches by pipes ( | ). Crewed flights are indicated in bold text. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in brackets.

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