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|Mission duration||10 years|
|Launch mass||5,800 kilograms (12,800 lb)|
|Start of mission|
|Launch date||18 December 2006, 06:32UTC|
|Launch site||Tanegashima Yoshinobu 1|
|Entered service||9 May 2007|
|End of mission|
|Deactivated||10 January 2017|
|Semi-major axis||42,163.77 kilometres (26,199.35 mi)|
|Perigee||35,769 kilometres (22,226 mi)|
|Apogee||35,816 kilometres (22,255 mi)|
|Argument of perigee||138.47 degrees|
|Epoch||29 October 2013, 19:34:27 UTC|
JAXA Engineering Test Satellite ETS-VIII (Kiku 8) is the eighth technology test satellite in a series which started with ETS-1 in 1975 by NASDA. It was launched with the H-2A on December 18, 2006. ETS-VIII was developed by JAXA in cooperation with NICT and NTT. The aim of ETS-VIII is to enable satellite communications with small terminals. Unlike the Iridium satellites for mobile communication, ETS-VIII is positioned at GEO. However to fulfill the task the satellite must carry two very large antennas. It was the first use of the 204 configuration (four strap-on boosters) of the H-IIA launch vehicle.
- December 20, 2000: Launch of LDREX, a demonstration of the large antenna reflector deployment, aboard Ariane 5. Deployment failed.
- October 14, 2006 Launch of LDREX-2 with the Ariane 5, model antenna deployed successfully.
- December 18, 2006: ETS-VIII was launched aboard H-IIA.
- December 26, 2006 Both antennas were deployed. 
- January 9, 2007 GEO orbit injection. 
- May 9, 2007 The satellite switched to normal operation phase. 
- January 10, 2017: Decommissioned.
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