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Also called ETS N or Kiku 8


Designation 29656 / 06059A
Launch date 18 Dec 2006
Country of origin Japan
Mission Telecommunications, experimental
Geostationary orbit 146°E
Launch vehicle H2A #18

One of the telecom payload developed problems after launch. The main mobility with handheld devices experiment will not be doable.


Begin End Position
L: Dec 2006 May 2010 146°E
May 2010 Jan 2017 146°E, inclined

End of life

Out of service Jan 2017
Cause Sent to junk orbit

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Technical data


Prime contractor  
Platform Mitsubishi (same as ETS 6 & Comets)
Mass at launch 5800 kg
Mass in orbit 2800 kg
Payload mass 1100 kg
Dimension 40 m span
Solar array  
Stabilization 3-axis
DC power 7500 W (after 3 years)
Design lifetime 3 years (satellite bus: 10 years)

Will feature two S-band transponders for mobile phone, digital broadcast and a nagivation system.
The navigation system will have Rubidium atomic clock and a signal generator for S- and Ka-band.

Two Large-Scale Deployable Reflectors will reach 19 x 17 m once deployed (1 m diameter at lift-off).

The giant antenna was to be tested on a piggyback mission on the first H2A launch in early 2000 but as the H2A program is compromised, LDREX was launched on Ariane.

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