Editing NOAA-4 (section)

{{Short description|Weather satellite operated by NOAA}}
{{Use mdy dates|date=October 2018}}
{{Infobox spaceflight
| name               = NOAA-4
| image              = NOAA 4 (ITOS G).jpg
| image_caption      = Illustration of the NOAA 4 (ITOS G) satellite
| mission_type       = [[Weather satellite|Weather]]
| operator           = [[NOAA]]{{\}}[[NASA]]
| website            = 
| COSPAR_ID          = 1974-089A<ref>{{cite web|title=NASA/NSSDC NOAA-4 spacecraft details|url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1974-089A|access-date=October 20, 2008}}</ref>
| SATCAT             = 7529
| mission_duration   = 4 years
| spacecraft_bus     = 
| manufacturer       = 
| dry_mass           = 
| launch_mass        = {{convert|339.7|kg|lb}}
| launch_date        = {{start date text|November 15, 1974, 17:11:00|timezone=yes}}&nbsp;UTC<ref name="launchlog">{{cite web|url=http://planet4589.org/space/log/launchlog.txt|title=Launch Log|first=Jonathan|last=McDowell|work=Jonathan's Space Page|access-date=December 8, 2013}}</ref>
| launch_rocket      = [[Delta 2000|Delta 2310]] D104
| launch_site        = [[Vandenberg Air Force Base|Vandenberg]] [[Vandenberg AFB Space Launch Complex 2|SLC-2W]]
| launch_contractor  = 
| entered_service    = 
| disposal_type      = Decommissioned
| deactivated        = {{end date text|November 18, 1978}}
| decay_date         = 
| orbit_epoch        = December 8, 2013, 12:44:30&nbsp;UTC<ref name="n2yo">{{cite web|url=http://www.n2yo.com/satellite/?s=7529|title=NOAA 4 Satellite details 1974-089A NORAD 7529|work=N2YO|date=December 8, 2013|access-date=December 8, 2013}}</ref>
| orbit_reference    = [[geocentric orbit|Geocentric]]
| orbit_regime       = [[Sun-synchronous orbit|Sun-synchronous]]
| orbit_periapsis    = {{convert|1451|km|mi|sp=us}}
| orbit_apoapsis     = {{convert|1465|km|mi|sp=us}}
| orbit_inclination  = 101.46&nbsp;degrees
| orbit_period       = 114.91&nbsp;minutes
| orbit_repeat       = 
| apsis              = gee
| instruments        = VHRR, VTPR, SR
| telescope_name     = 
| telescope_type     = 
| telescope_diameter = 
| telescope_focal_length = 
| telescope_area     = 
| telescope_wavelength = 
| programme          = [[Improved Tiros Operational System|ITOS]]
| previous_mission   = [[NOAA-3]]
| next_mission       = [[NOAA-5]]
}}

'''NOAA-4''', also known as '''ITOS-G''' was a [[weather satellite]] operated by the [[National Oceanic and Atmospheric Administration]] (NOAA).<ref>{{Cite web |title=WMO OSCAR {{!}} Satellite: NOAA-4 |url=https://space.oscar.wmo.int/satellites/view/noaa_4 |access-date=2024-03-20 |website=space.oscar.wmo.int}}</ref> It was part of a series of satellites called ITOS, or improved [[TIROS]].<ref>{{cite encyclopedia|last=Wade|first=Mark|title=ITOS|encyclopedia=Encyclopedia Astronautica|url=http://www.astronautix.com/craft/itos.htm|access-date=October 20, 2008|url-status=dead|archive-url=https://web.archive.org/web/20080913224529/http://www.astronautix.com/craft/itos.htm|archive-date=September 13, 2008}}</ref> 
[[File:TracyLoop.gif|left|thumb|NOAA-4 images of [[cyclone Tracy]]]]
NOAA-4 was launched on a [[Delta rocket]] on November 15, 1974. The launch carried two other satellites: [[AMSAT-OSCAR 7]] and [[Intasat]].<ref name="launchlog" />

It remained operational for 1463 days until it was deactivated by NOAA on November 18, 1978.