| 词条 | USA-92 |
| 释义 |
| name = USA-92 | image = | image_caption = | insignia = | mission_type = Navigation | operator = US Air Force | COSPAR_ID = 1993-042A[1] | SATCAT = 22700[1] | mission_duration = 7.5 years (planned)[3] | spacecraft = | spacecraft_type = GPS Block IIA[3] | manufacturer = Rockwell[3] | launch_mass = {{convert|1816|kg}}[3] | dimensions = | power = | launch_date = {{start-date|26 June 1993, 13:27:00|timezone=yes}} UTC | launch_rocket = {{nowrap|Delta II 7925-9.5,}} D221[7] | launch_site = Cape Canaveral LC-17A[7] | entered_service = | disposal_type = Placed in a graveyard orbit | deactivated = {{end-date|19 May 2014, 22:00:00|timezone=yes}} UTC | orbit_slot = | orbit_epoch = | orbit_reference = Geocentric | orbit_regime = Medium Earth (Semi-synchronous) | orbit_periapsis = {{convert|20120|km}}[9] | orbit_apoapsis = {{convert|20244|km}}[9] | orbit_inclination = 54.7 degrees[9] | orbit_period = 717.96 minutes[9] | apsis = gee }} 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-92 was launched at 13:27:00 UTC on 26 June 1993, atop a Delta II carrier rocket, flight number D221, flying in the 7925-9.5 configuration.[2] The launch took place from Launch Complex 17A at the Cape Canaveral Air Force Station,[3] and placed USA-92 into a transfer orbit. The satellite raised itself into medium Earth orbit using a Star-37XFP apogee motor.[4] On 27 July 1993, USA-92 was in an orbit with a perigee of {{convert|20120|km}}, an apogee of {{convert|20244|km}}, a period of 717.96 minutes, and 54.7 degrees of inclination to the equator.[5] It broadcasts the PRN 09 signal, and operates in slot 1 of plane A of the GPS constellation.[6] The satellite has a mass of {{convert|1816|kg}}. It had a design life of 7.5 years;[4] however, it was kept in service for over 20 years before finally decommissioned from service on May 19, 2014.[7] Following decommissioning, it was subsequently placed in a disposal orbit approximately 1000 km above the operational constellation on September 21, 2015.[8] References1. ^1 {{cite web|url=http://nssdc.gsfc.nasa.gov/nmc/spacecraftDisplay.do?id=1993-042A|title=Navstar 2A-12|publisher=US National Space Science Data Center|accessdate=10 July 2012}} {{Portal|Spaceflight}}{{GPS satellites}}{{Orbital launches in 1993}}{{US-spacecraft-stub}}2. ^1 2 {{cite web|url=http://planet4589.org/space/log/launchlog.txt|title=Launch Log|publisher=Jonathan's Space Page|first=Jonathan|last=McDowell|accessdate=10 July 2012}} 3. ^{{cite web|url=http://planet4589.org/space/lvdb/list2.html|title=Launch List|publisher=Jonathan's Space Page|work=Launch Vehicle Database|first=Jonathan|last=McDowell|accessdate=10 July 2012}} 4. ^1 2 3 4 5 {{cite web|url=http://space.skyrocket.de/doc_sdat/navstar-2a.htm|title=GPS-2A (Navstar-2A)|first=Gunter|last=Krebs|work=Gunter's Space Page|accessdate=10 July 2012}} 5. ^1 2 3 4 {{cite web|url=http://planet4589.org/space/log/satcat.txt|title=Satellite Catalog|publisher=Jonathan's Space Page|first=Jonathan|last=McDowell|accessdate=10 July 2012}} 6. ^{{cite web|url=http://www.astronautix.com/project/navstar.htm|title=Navstar|publisher=Encyclopedia Astronautica|first=Mark|last=Wade|accessdate=10 July 2012}} 7. ^{{cite web|url=http://www.navcen.uscg.gov/?Do=gpsShowNanu&num=2014046|title=NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2014046|publisher=United States Coast Guard|accessdate=21 May 2014}} 8. ^{{cite web|url=http://www.schriever.af.mil/news/story_print.asp?id=123459080|title=2 SOPS adapts new disposal approval process|publisher=United States Air Force|accessdate=31 October 2015}}{{Dead link|date=July 2018 |bot=InternetArchiveBot |fix-attempted=no }} 3 : Spacecraft launched in 1993|GPS satellites|USA satellites |
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