| 词条 | Intelsat II F-4 |
| 释义 |
| name = Intelsat II F-4 | image = | image_caption = | mission_type = Communications | operator = Intelsat | website = | COSPAR_ID = 1967-094A[1] | SATCAT = 2969[1] | mission_duration = 3 years planned {{frac|3|1|2}} years achieved | spacecraft_bus = HS-303A | spacecraft_type = Intelsat II | manufacturer = Hughes | dry_mass = | launch_mass = {{convert|162|kg}} | BOL_mass = {{convert|86|kg}} | dimensions = | power = 85 watts | launch_date = {{start-date|September 28, 1967, 00:45:00|timezone=yes}} UTC[2] | launch_rocket = Delta E1 | launch_site = Cape Canaveral LC-17B | launch_contractor = NASA | disposal_type = | deactivated = c. {{end-date|1971}} | orbit_epoch = February 8, 2014, 07:56:55 UTC[3] | orbit_reference = Geocentric | orbit_regime = Geosynchronous | orbit_periapsis = {{convert|35742|km|mi|sp=us}} | orbit_apoapsis = {{convert|35886|km|mi|sp=us}} | orbit_inclination = 6.00 degrees | orbit_period = 23.95 hours | orbit_longitude = 176° east (1967-70) 166° west (1971) | apsis = gee | trans_band = | trans_frequency = | trans_bandwidth = | trans_capacity = | trans_coverage = | trans_TWTA = | trans_EIRP = | trans_HPBW = | programme = Intelsat II | previous_mission = Intelsat II F-3 | next_mission = Intelsat III F-1 (Intelsat III) }}Intelsat II F-4 was a communications satellite operated by Intelsat. Launched in 1967 it was operated in geostationary orbit at a longitude of 176 degrees east and later 166 degrees west.[4] The fourth and last Intelsat II satellite to be launched, Intelsat II F-4 was built by Hughes Aircraft around the HS-303A satellite bus. It carried two transponders, which were powered by body-mounted solar cells generating 85 watts of power.[5] The spacecraft had a mass of {{convert|162|kg|lb}} at launch, decreasing through expenditure of propellant to {{convert|86|kg|lb}} by the beginning of its operational life. Intelsat II F-4 was launched atop a Delta E1 rocket flying from Launch Complex 17B at the Cape Canaveral Air Force Station. The launch took place at 00:45:00 UTC on September 28, 1967, with the spacecraft entering a geosynchronous transfer orbit.[2] It fired an SVM-1 apogee motor to place itself into its operational geostationary orbit. The spacecraft was operated at a longitude of 176° east until 1970, before being moved to 166° west. In total the satellite remained in service for around three and a half years.[4] As of February 8, 2014 the derelict Intelsat II F-4 was in an orbit with a perigee of {{convert|35742|km|mi|sp=us}}, an apogee of {{convert|35886|km|mi|sp=us}}, inclination of 6.00 degrees and an orbital period of 23.95 hours.[3] References1. ^1 {{cite web|url=http://nssdc.gsfc.nasa.gov/nmc/spacecraftDisplay.do?id=1967-094A|title=INTELSAT 2 F-4|publisher=National Space Science Data Center|accessdate=February 8, 2014}} {{Portal|Spaceflight}}{{Intelsat}}{{Orbital launches in 1967}}{{Use mdy dates|date=February 2014}}{{Use American English|date=February 2014}}{{DEFAULTSORT:Intelsat 204}}2. ^1 {{cite web|url=http://planet4589.org/space/log/launchlog.txt|title=Launch Log|first=Jonathan|last=McDowell|work=Jonathan's Space Page|accessdate=February 8, 2014}} 3. ^1 {{cite web|url=http://www.n2yo.com/satellite/?s=2969|title=INTELSAT 2-F4 Satellite details 1967-094A NORAD 2969|work=N2YO|date=February 8, 2014|accessdate=February 8, 2014}} 4. ^1 {{cite web|url=http://www.astronautix.com/craft/intlsat2.htm|title=Intelsat 2|first=Mark|last=Wade|work=Encyclopedia Astronautica|accessdate=February 8, 2014}} 5. ^{{cite web|url=http://space.skyrocket.de/doc_sdat/intelsat-2.htm|title=Intelsat-2|first=Gunter|last=Krebs|work=Gunter's Space Page|accessdate=February 8, 2014}} 3 : Intelsat satellites|Hughes aircraft|Spacecraft launched in 1967 |
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