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((refimprove|date=July 2012))
((about|the German satellite|the unrelated family of enzymes|TET1||))
((Infobox spaceflight
| name                  = TET-1
| image                 = TET-1 EMCTest.jpg
| image_caption         = TET-1 undergoing testing

| mission_type          = Technology
| operator              = [[German Aerospace Center|DLR]]
| website               = 
| COSPAR_ID             = 2012-039D 
| SATCAT                = 
| mission_duration      =

| spacecraft_bus        = 
| manufacturer          = [[Kayser-Threde|Kayser-Threde GmbH]]
| dry_mass              = 
| launch_mass           = 
| power                 =

| launch_date           = ((start-date|22 July 2012, 06:41|timezone=yes))&nbsp;UTC<ref name="NSF">((cite web|url=http://www.nasaspaceflight.com/2012/07/russian-soyuz-fg-launches-five-satellites/|title=Russian Soyuz-FG successfully launches five satellites|first=Chris|last=Bergin|publisher=NASASpaceflight.com|date=22 July 2012|accessdate=22 July 2012))</ref>
| launch_rocket         = [[Soyuz-FG]]/[[Fregat]]  
| launch_site           = [[Baikonur Cosmodrome|Baikonur]] [[Baikonur Cosmodrome Site 31|31/6]]
| launch_contractor     =

| disposal_type         = 
| deactivated           = 
| last_contact          = 17 November 2022
| decay_date            = 18 November 2022

| orbit_epoch           = 
| orbit_reference       = [[geocentric orbit|Geocentric]]
| orbit_regime          = [[Low Earth orbit|Low Earth]]
| orbit_periapsis       = 
| orbit_apoapsis        = 
| orbit_inclination     = 
| orbit_period          = 
| apsis                 = gee
))
'''TET-1''' (((lang-de|Technologieerprobungsträger 1)), ''Technology Experiment Carrier'') was a [[Miniaturized satellite|microsatellite]] operated by the [[German Space Operations Center]] of the [[German Aerospace Center]]. It was the centre of the OOV (On Orbit Verification) Program, initiated to offer on-orbit verification possibilities to the German industrial and scientific aerospace community.<ref>((cite web |url=https://www.dlr.de/rd/en/desktopdefault.aspx/tabid-2265/3376_read-9781/ |title=Das On-Orbit-Verifikations-Programm |trans-title=The On-Orbit-Verification-Program |website=DLR Portal |publisher=[[German Aerospace Center|DLR]] |access-date=2022-11-24 |language=de))</ref> TET was based on the [[satellite bus]] used for the [[BIRD (satellite)|BIRD]] satellite, which was launched in 2001.<ref>((cite web |url=https://www.ohb-system.de/In-Orbit-Verification.html |title=In-Orbit Verification |website=OHB |publisher=OHB-System AG |access-date=2022-11-23))</ref>

The main contractor for Phase A (feasibility) was [[IABG]]. The final contract for Phases B, C, and D (definition/qualification, and production) and start was given to [[Kayser-Threde|Kayser-Threde GmbH]], a medium-sized aerospace company based in [[Munich]] belonging to the German [[OHB-System]] group. The environmental qualification was successfully conducted in the IABG space simulation centre in Munich.

TET-1 was carried to orbit as a secondary payload on a [[Soyuz-FG]]/[[Fregat]] carrier rocket which was launched from the [[Baikonur Cosmodrome]] on 22 July 2012.<ref name="NSF"/> The primary payload of the launch was the [[Kanopus-V1]] satellite, with the [[BelKA-2]], [[Zond-PP]] and [[exactView-1]] satellites also flying on the same rocket.

After 10 years in orbit, the TET-1 satellite re-entered into the atmosphere on 18 November 2022.<ref>((cite web |url=https://www.dlr.de/content/de/artikel/news/2022/04/20221121_abschied-vom-technologie-erprobungstraeger-tet-1.html |title=Abschied vom Technologie-Erprobungsträger (TET-1) |trans-title=Farewell to the technology test vehicle (TET-1) |date=2022-11-21 |website=DLR Portal |publisher=[[German Aerospace Center|DLR]] |access-date=2022-11-23 |language=de))</ref>

==References==
((reflist))

==External links==
((Portal|Spaceflight))
* [http://www.dlr.de/rd/desktopdefault.aspx/tabid-2274//3396_read-5085/Technologieerprobungsträger TET-1 information on DLR website]
* [https://directory.eoportal.org/web/eoportal/satellite-missions/t/tet-1 TET-1 information on eoPortal website]
* [http://www.kayser-threde.com/tet Kayser-Threde GmbH TET-1 logbook] ((Webarchive|url=https://web.archive.org/web/20101122084828/http://www.kayser-threde.com/tet/ |date=2010-11-22 ))
* [https://www.ohb-system.de/files/images/mediathek/downloads/OHB-System_TET_2018.pdf Brochure "TET - The Small Satellite"] on OHB website

((Orbital launches in 2012))

[[Category:Spacecraft launched in 2012]]
[[Category:Spacecraft which reentered in 2022]]
[[Category:Satellites of Germany]]
[[Category:Spacecraft launched by Soyuz-FG rockets]]

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