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((Short description|American communications satellite))
((More citations needed|date=January 2014))
((Use American English|date=April 2014))
((Use dmy dates|date=July 2020))
((Infobox spaceflight
| name              = TDRS-8
| image             = TDRS-H at KSC.jpg
| image_caption     = TDRS-H undergoing processing before launch
| insignia          = TDRS H Logo.png

| mission_type      = [[Communications satellite|Communication]]
| operator          = [[NASA]]
| COSPAR_ID         = 2000-034A
| SATCAT            = 26388
| mission_duration  = Planned: 11 years<br/>Elapsed: ((time interval|30 June 2000 12:56|show=ymd|sep=,))

| spacecraft_bus    = [[Boeing 601|BSS-601]]
| manufacturer      = [[Boeing]]
| dry_mass          = 
| launch_mass       = 3197 kg
| dimensions        = 21.0 metres long<br/>13.1 metres wide
| power             = 2300 watts

| launch_date       = ((start-date|30 June 2000, 12:56:00))&nbsp;[[UTC]]
| launch_rocket     = [[Atlas II]]A
| launch_site       = [[Cape Canaveral Air Force Station|Cape Canaveral]], [[Cape Canaveral Launch Complex 36|LC-36A]]
| launch_contractor = [[International Launch Services|ILS]]

| entered_service   =
| disposal_type     = 
| deactivated       = <!-- ((end-date|[insert date here])) -->

| orbit_epoch       = 1 July 2000
| orbit_reference   = [[Geocentric orbit]]
| orbit_regime      = [[Geostationary orbit]]
| orbit_longitude   = 171.0° West (2000-?)<br/>270.8° West
| orbit_slot        = 
| apsis             = gee

| trans_band        = 
| trans_frequency   = 
| trans_bandwidth   = 
| trans_capacity    = 
| trans_coverage    = 
| trans_TWTA        = 
| trans_EIRP        = 
| trans_HPBW        = 
))

'''TDRS-8''', known before launch as '''TDRS-H''', is an American [[communications satellite]], of second generation, which is operated by [[NASA]] as part of the [[Tracking and Data Relay Satellite System]]. It was constructed by [[Boeing]] and is based on the [[Boeing 601|BSS-601]] [[satellite bus]].

==Launch==
[[File:TDRS-H launch.jpg|left|thumb|150px|The launch of TDRS-H]]

Its launch was contracted by [[International Launch Services]], using an [[Atlas II]]A [[launch vehicle]]. The launch occurred on 30 June 2000, at 12:56:00 UTC from [[Cape Canaveral Launch Complex 36|Launch Complex 36A]] at the [[Cape Canaveral Air Force Station]].

It was the first [[Tracking and Data Relay Satellite]], of second generation, to be launched. Due to a malfunction of the [[multiple-access phased array antenna]] the spacecraft did not provide the expected level of performance for eighteen of the communications services that it was to provide. The same problem was found and corrected on the [[TDRS-9]] and [[TDRS-10]] satellites prior to their launches.

==Orbit==
Following its launch, it raised itself into [[geostationary orbit]] by means of its onboard [[R-4D]] [[apogee motor]], and was positioned at 150.0° West for on-orbit testing. After testing was complete, it was moved to 171.0° West from where it provides communications services to spacecraft in Earth orbit, including the [[Space Shuttle]] and [[International Space Station]].

[[File:Location of TDRS.svg|left|thumb|Location of TDRS as of 26 May 2020]]
[[File:Map of TDRS.png|center|thumb|Location of TDRS as of 18 March 2019]]
((Clear))

==See also==
((Portal|Spaceflight))
* [[2000 in spaceflight]]
* [[List of TDRS satellites]] 
((Clear))

==External links==
((reflist))
((refbegin))
* ((cite web |url=http://space.skyrocket.de/doc_sdat/tdrs-8.htm |title=TDRS-8, 9, 10 |publisher=Gunter's Space Page |first=Gunter |last=Krebs |accessdate=3 May 2009))
* ((cite web |url=http://planet4589.org/space/jsr/back/news.427 |title=Issue 427 |publisher=[[Jonathan's Space Report]] |first=Jonathan |last=McDowell |accessdate=3 May 2009 |date=29 May 2000 |archive-date=6 December 2012 |archive-url=https://web.archive.org/web/20121206104811/http://planet4589.org/space/jsr/back/news.427 |url-status=dead ))
* ((cite web |url=http://sat-nd.com/failures/index.html?http://sat-nd.com/failures/tdrs8.html |title=TDRS-8 |work=Failures |publisher=Sat-ND |accessdate=3 May 2009))
* ((cite web |url=http://ipp.nasa.gov/innovation/Innovation_85/R-16937-Web-V8N5/atcomm.html |archive-url=https://web.archive.org/web/20041031073638/http://ipp.nasa.gov/innovation/Innovation_85/R-16937-Web-V8N5/atcomm.html |url-status=dead |archive-date=2004-10-31 |title=Communications Satellite Serves Space Projects |work=Advanced Technologies, Volume 8 Number 5 |publisher=NASA Aerospace Technology Innovation |date=September 2000 |accessdate=3 May 2009))
((refend))

((TDRS))
((Orbital launches in 2000))

((DEFAULTSORT:Tdrs-8))
[[Category:Communications satellites in geostationary orbit]]
[[Category:Satellites using the BSS-601 bus]]
[[Category:Spacecraft launched in 2000]]
[[Category:TDRS satellites]]
[[Category:Spacecraft launched by Atlas rockets]]


((US-spacecraft-stub))

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