| 词条 | OPS 5118 |
| 释义 |
| name = OPS 5118 | image = | image_caption = | insignia = | mission_type = Navigation Technology | operator = US Air Force | COSPAR_ID = 1980-032A[1] | SATCAT = 11783[1] | mission_duration = 5 years (planned) 11 years (achieved) | spacecraft = | spacecraft_type = GPS Block I | manufacturer = Rockwell[3] | launch_mass = {{convert|759|kg}}[3] | dimensions = | power = | launch_date = {{start-date|26 April 1980, 22:00|timezone=yes}} UTC | launch_rocket = {{nowrap|Atlas E/F SGS-1,}} 34F[5] | launch_site = Vandenberg SLC-3E[5] | entered_service = | disposal_type = | deactivated = {{end-date|6 March 1991}} | orbit_epoch = | orbit_reference = Geocentric | orbit_regime = Medium Earth (Semi-synchronous) | orbit_periapsis = {{convert|20006|km}}[7] | orbit_apoapsis = {{convert|20357|km}}[7] | orbit_inclination = 62.8 degrees[7] | orbit_period = 717.94 minutes[7] | apsis = gee }}OPS 5118, also known as Navstar 6, GPS I-6 and GPS SVN-6, was an American navigation satellite launched in 1980 as part of the Global Positioning System development programme. It was the sixth of eleven Block I GPS satellites to be launched.[3] OPS 5118 was launched at 22:00 UTC on 26 April 1980, atop an Atlas E/F carrier rocket with an SGS-1 upper stage. The Atlas used had the serial number 34F, and was originally built as an Atlas F.[2] The launch took place from Space Launch Complex 3E at Vandenberg Air Force Base,[3] and placed OPS 5118 into a transfer orbit. The satellite raised itself into medium Earth orbit using a Star-27 apogee motor.[4] By 27 May 1980, OPS 5118 had been raised to an orbit with a perigee of {{convert|20006|km}}, an apogee of {{convert|20357|km}}, a period of 717.94 minutes, and 62.8 degrees of inclination to the equator.[5] The satellite had a design life of 5 years and a mass of {{convert|758|kg}}.[4] It broadcast the PRN 09 signal in the GPS demonstration constellation, and was retired from service on 6 March 1991. References1. ^1 {{cite web|url=http://nssdc.gsfc.nasa.gov/nmc/spacecraftDisplay.do?id=1980-032A|title=Navstar 6|publisher=US National Space Science Data Center|accessdate=25 June 2012}} {{Portal|Spaceflight}}{{GPS satellites}}{{Orbital launches in 1980}}{{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=12 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=12 July 2012}} 4. ^1 2 3 4 {{cite web|url=http://space.skyrocket.de/doc_sdat/navstar.htm|title=GPS (Navstar)|first=Gunter|last=Krebs|work=Gunter's Space Page|accessdate=12 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=12 July 2012}} 2 : Spacecraft launched in 1980|GPS satellites |
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