View source for UoSAT-12

{{Short description|Amateur radio satellite}}
{{Use dmy dates|date=April 2022}}
{{Infobox spaceflight
| name                  = UoSAT-12
| image                 = 
| image_caption         =

| mission_type          = 
| operator              = [[University of Surrey]]
| website               = 
| COSPAR_ID             = 1999-021A 
| SATCAT                = 25693 
| mission_duration      =

| spacecraft_bus        = 
| manufacturer          = [[Surrey Satellite Technology Ltd|SSTL]]
| dry_mass              = 
| launch_mass           = 
| dimensions            = 
| power                 =

| launch_date           = {{start-date|21 April 1999, 05:00|timezone=yes}}&nbsp;UTC 
| launch_rocket         = [[Dnepr (rocket)|Dnepr]]
| launch_site           = [[Baikonur Cosmodrome|Baikonur]] [[Baikonur Cosmodrome Site 109|109/95]]
| launch_contractor     =

| disposal_type         = 
| deactivated           = 
| last_contact          = <!-- {{end-date|[insert date here]}} -->
| decay_date            = <!-- when craft re-entered the atmosphere -->

| orbit_epoch           = 
| orbit_reference       = [[geocentric orbit|Geocentric]]
| orbit_regime          = [[Sun-synchronous orbit|Sun-synchronous]]
| orbit_periapsis       = 
| orbit_apoapsis        = 
| orbit_inclination     = 
| orbit_period          = 
| apsis                 = gee
}}

'''UoSAT-12''' is a British satellite in [[Low Earth Orbit]]. It is the twelfth satellite in the University of Surrey series and was designed and built by Surrey Satellite Technology Ltd. (SSTL). It was launched into orbit in April 1999 on board a Dnepr rocket from Yasny Russia.<ref name="uosat-12">M. Fouquet and M. Sweeting, [https://archive.today/20121223154334/http://info.ee.surrey.ac.uk/SSC/CSER/UOSAT/papers/iaf96/minieis/minieis.html UoSAT-12 minisatellite for high performance Earth observation at low cost], proceedings of IAF '96.</ref>

==Mission==
UoSAT-12 was an experimental mission used to demonstrate and test a number of new technologies. Imaging cameras and a high-speed 1&nbsp;Mbit/s S-band downlink (the MERLION experiment) were tested. An [[Internet Protocol]] stack was uploaded to the satellite, allowing experiments in extending the Internet to space to be made by [[NASA Goddard Space Flight Center|NASA Goddard]] as part of its Operating Missions as Nodes on the Internet (OMNI) effort.<ref name="hogie">K. Hogie, ''et al.'', [https://dx.doi.org/10.1016/j.comnet.2004.08.005 Using standard Internet Protocols and applications in space], Computer Networks, special issue on Interplanetary Internet, vol. 47 no. 5, pp. 603-650, April 2005.</ref><ref name="hogie2">K. Hogie, ''et al.'', [http://www.csc.com/cscworld/backissues Putting more Internet nodes in space] {{webarchive|url=https://web.archive.org/web/20081116071516/http://www.csc.com/cscworld/backissues/ |date=2008-11-16 }}, CSC World, Computer Sciences Corporation, pp. 21-23, April/June 2006.</ref>

These now-proven technologies were later adopted by SSTL in the design of its [[Disaster Monitoring Constellation]] satellites.

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== References ==
{{Portal|Spaceflight}}
{{reflist}}

{{UoSAT}}
{{Orbital launches in 1999}}

[[Category:University of Surrey]]
[[Category:Amateur radio satellites]]
[[Category:Satellites of the United Kingdom]]
[[Category:Spacecraft launched in 1999]]
[[Category:Satellite Internet access]]
[[Category:Spacecraft launched by Dnepr rockets]]


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